be21d5daa5
Patch from http://trac.sagemath.org/ticket/12970 . In particular, make sure that MPIR builds correctly in VMs which do not expose all the CPUs capabilities.
3634 lines
109 KiB
Plaintext
3634 lines
109 KiB
Plaintext
dnl GMP specific autoconf macros
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dnl Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software
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dnl Foundation, Inc.
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dnl
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dnl Copyright 2008 William Hart
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dnl
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dnl This file is part of the MPIR Library.
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dnl
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dnl The MPIR Library is free software; you can redistribute it and/or modify
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dnl it under the terms of the GNU Lesser General Public License as published
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dnl by the Free Software Foundation; either version 2.1 of the License, or (at
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dnl your option) any later version.
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dnl
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dnl The MPIR Library is distributed in the hope that it will be useful, but
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dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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dnl License for more details.
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dnl
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dnl You should have received a copy of the GNU Lesser General Public License
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dnl along with the MPIR Library; see the file COPYING.LIB. If not, write to
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dnl the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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dnl MA 02110-1301, USA.
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dnl Some tests use, or must delete, the default compiler output. The
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dnl possible filenames are based on what autoconf looks for, namely
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dnl
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dnl a.out - normal unix style
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dnl b.out - i960 systems, including gcc there
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dnl a.exe - djgpp
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dnl a_out.exe - OpenVMS DEC C called via GNV wrapper (gnv.sourceforge.net)
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dnl conftest.exe - various DOS compilers
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define(IA64_PATTERN,
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[[ia64*-*-* | itanium-*-* | itanium2-*-*]])
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define(POWERPC64_PATTERN,
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[[powerpc64-*-* | powerpc64le-*-* | powerpc620-*-* | powerpc630-*-* | powerpc970-*-* | power[3-9]-*-*]])
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define(X86_PATTERN,
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[[i?86*-*-* | k[5-8]*-*-* | pentium*-*-* | athlon-*-* | viac3*-*-*]])
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define(X86_64_PATTERN,
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[[x86_64-*-* | netburst-*-* | netburstlahf-*-* | k8-*-* | k10-*-* | k102-*-* | k103-*-* | core2-*-* | penryn-*-* | nehalem-*-* | westmere-*-* | sandybridge-*-* | atom-*-* | nano-*-* | bobcat-*-* | bulldozer-*-*]])
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dnl GMP_FAT_SUFFIX(DSTVAR, DIRECTORY)
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dnl ---------------------------------
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dnl Emit code to set shell variable DSTVAR to the suffix for a fat binary
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dnl routine from DIRECTORY. DIRECTORY can be a shell expression like $foo
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dnl etc.
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dnl
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dnl The suffix is directory separators / or \ changed to underscores, and
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dnl if there's more than one directory part, then the first is dropped.
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dnl
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dnl For instance,
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dnl
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dnl x86 -> x86
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dnl x86/k6 -> k6
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dnl x86/k6/mmx -> k6_mmx
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dnl also want to turn x86_64w into x86_64
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define(GMP_FAT_SUFFIX,
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[
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if test "$2" = "x86_64w"; then
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[$1="x86_64"]
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else
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[$1=`echo $2 | sed -e '/\//s:^[^/]*/::' -e 's:[\\/]:_:g'`]
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fi
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])
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dnl GMP_REMOVE_FROM_LIST(listvar,item)
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dnl ----------------------------------
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dnl Emit code to remove any occurance of ITEM from $LISTVAR. ITEM can be a
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dnl shell expression like $foo if desired.
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define(GMP_REMOVE_FROM_LIST,
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[remove_from_list_tmp=
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for remove_from_list_i in $[][$1]; do
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if test $remove_from_list_i = [$2]; then :;
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else
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remove_from_list_tmp="$remove_from_list_tmp $remove_from_list_i"
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fi
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done
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[$1]=$remove_from_list_tmp
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])
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dnl GMP_STRIP_PATH(subdir)
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dnl ----------------------
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dnl Strip entries */subdir from $path and $fat_path.
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define(GMP_STRIP_PATH,
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[GMP_STRIP_PATH_VAR(path, [$1])
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GMP_STRIP_PATH_VAR(fat_path, [$1])
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])
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define(GMP_STRIP_PATH_VAR,
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[tmp_path=
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for i in $[][$1]; do
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case $i in
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*/[$2]) ;;
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*) tmp_path="$tmp_path $i" ;;
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esac
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done
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[$1]="$tmp_path"
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])
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dnl GMP_INCLUDE_GMP_H
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dnl -----------------
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dnl Expand to the right way to #include gmp-h.in. This must be used
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dnl instead of mpir.h, since that file isn't generated until the end of the
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dnl configure.
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dnl
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dnl Dummy values for __GMP_BITS_PER_MP_LIMB and GMP_LIMB_BITS are enough
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dnl for all current configure-time uses of mpir.h.
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define(GMP_INCLUDE_GMP_H,
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[[#define __GMP_WITHIN_CONFIGURE 1 /* ignore template stuff */
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#define GMP_NAIL_BITS $GMP_NAIL_BITS
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#define __GMP_BITS_PER_MP_LIMB 123 /* dummy for GMP_NUMB_BITS etc */
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#define GMP_LIMB_BITS 123
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$DEFN_LONG_LONG_LIMB
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#include "$srcdir/gmp-h.in"]
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])
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dnl GMP_HEADER_GETVAL(NAME,FILE)
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dnl ----------------------------
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dnl Expand at autoconf time to the value of a "#define NAME" from the given
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dnl FILE. The regexps here aren't very rugged, but are enough for gmp.
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dnl /dev/null as a parameter prevents a hang if $2 is accidentally omitted.
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define(GMP_HEADER_GETVAL,
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[patsubst(patsubst(
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esyscmd([grep "^#define $1 " $2 /dev/null 2>/dev/null]),
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[^.*$1[ ]+],[]),
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[[
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]*$],[])])
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dnl GMP_VERSION
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dnl -----------
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dnl The gmp version number, extracted from the #defines in gmp-h.in at
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dnl autoconf time. Two digits like 3.0 if patchlevel <= 0, or three digits
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dnl like 3.0.1 if patchlevel > 0.
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define(GMP_VERSION,
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[GMP_HEADER_GETVAL(__GNU_MP_VERSION,gmp-h.in)[]dnl
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.GMP_HEADER_GETVAL(__GNU_MP_VERSION_MINOR,gmp-h.in)[]dnl
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ifelse(m4_eval(GMP_HEADER_GETVAL(__GNU_MP_VERSION_PATCHLEVEL,gmp-h.in) > 0),1,
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[.GMP_HEADER_GETVAL(__GNU_MP_VERSION_PATCHLEVEL,gmp-h.in)])])
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dnl MPIR_VERSION
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dnl -----------
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dnl The mpir version number, extracted from the #defines in gmp-h.in at
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dnl autoconf time.
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define(MPIR_VERSION,
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[GMP_HEADER_GETVAL(__MPIR_VERSION,gmp-h.in)[]dnl
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.GMP_HEADER_GETVAL(__MPIR_VERSION_MINOR,gmp-h.in)[]dnl
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.GMP_HEADER_GETVAL(__MPIR_VERSION_PATCHLEVEL,gmp-h.in)])
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dnl GMP_SUBST_CHECK_FUNCS(func,...)
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dnl ------------------------------
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dnl Setup an AC_SUBST of HAVE_FUNC_01 for each argument.
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AC_DEFUN([GMP_SUBST_CHECK_FUNCS],
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[m4_if([$1],,,
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[_GMP_SUBST_CHECK_FUNCS(ac_cv_func_[$1],HAVE_[]m4_translit([$1],[a-z],[A-Z])_01)
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GMP_SUBST_CHECK_FUNCS(m4_shift($@))])])
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dnl Called: _GMP_SUBST_CHECK_FUNCS(cachevar,substvar)
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AC_DEFUN([_GMP_SUBST_CHECK_FUNCS],
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[case $[$1] in
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yes) AC_SUBST([$2],1) ;;
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no) [$2]=0 ;;
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esac
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])
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dnl GMP_SUBST_CHECK_HEADERS(foo.h,...)
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dnl ----------------------------------
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dnl Setup an AC_SUBST of HAVE_FOO_H_01 for each argument.
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AC_DEFUN([GMP_SUBST_CHECK_HEADERS],
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[m4_if([$1],,,
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[_GMP_SUBST_CHECK_HEADERS(ac_cv_header_[]m4_translit([$1],[./],[__]),
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HAVE_[]m4_translit([$1],[a-z./],[A-Z__])_01)
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GMP_SUBST_CHECK_HEADERS(m4_shift($@))])])
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dnl Called: _GMP_SUBST_CHECK_HEADERS(cachevar,substvar)
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AC_DEFUN([_GMP_SUBST_CHECK_HEADERS],
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[case $[$1] in
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yes) AC_SUBST([$2],1) ;;
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no) [$2]=0 ;;
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esac
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])
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dnl GMP_COMPARE_GE(A1,B1, A2,B2, ...)
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dnl ---------------------------------
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dnl Compare two version numbers A1.A2.etc and B1.B2.etc. Set
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dnl $gmp_compare_ge to yes or no accoring to the result. The A parts
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dnl should be variables, the B parts fixed numbers. As many parts as
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dnl desired can be included. An empty string in an A part is taken to be
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dnl zero, the B parts should be non-empty and non-zero.
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dnl
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dnl For example,
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dnl
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dnl GMP_COMPARE($major,10, $minor,3, $subminor,1)
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dnl
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dnl would test whether $major.$minor.$subminor is greater than or equal to
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dnl 10.3.1.
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AC_DEFUN([GMP_COMPARE_GE],
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[gmp_compare_ge=no
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GMP_COMPARE_GE_INTERNAL($@)
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])
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AC_DEFUN([GMP_COMPARE_GE_INTERNAL],
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[ifelse(len([$3]),0,
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[if test -n "$1" && test "$1" -ge $2; then
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gmp_compare_ge=yes
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fi],
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[if test -n "$1"; then
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if test "$1" -gt $2; then
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gmp_compare_ge=yes
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else
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if test "$1" -eq $2; then
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GMP_COMPARE_GE_INTERNAL(m4_shift(m4_shift($@)))
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fi
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fi
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fi])
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])
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dnl GMP_PROG_AR
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dnl -----------
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dnl GMP additions to $AR.
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dnl
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dnl A cross-"ar" may be necessary when cross-compiling since the build
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dnl system "ar" might try to interpret the object files to build a symbol
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dnl table index, hence the use of AC_CHECK_TOOL.
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dnl
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dnl A user-selected $AR is always left unchanged. AC_CHECK_TOOL is still
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dnl run to get the "checking" message printed though.
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dnl
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dnl If extra flags are added to AR, then ac_cv_prog_AR and
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dnl ac_cv_prog_ac_ct_AR are set too, since libtool (cvs 2003-03-31 at
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dnl least) will do an AC_CHECK_TOOL and that will AR from one of those two
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dnl cached variables. (ac_cv_prog_AR is used if there's an ac_tool_prefix,
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dnl or ac_cv_prog_ac_ct_AR is used otherwise.) FIXME: This is highly
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dnl dependent on autoconf internals, perhaps it'd work to put our extra
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dnl flags into AR_FLAGS instead.
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dnl
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dnl $AR_FLAGS is set to "cq" rather than leaving it to libtool "cru". The
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dnl latter fails when libtool goes into piecewise mode and is unlucky
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dnl enough to have two same-named objects in separate pieces, as happens
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dnl for instance to random.o (and others) on vax-dec-ultrix4.5. Naturally
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dnl a user-selected $AR_FLAGS is left unchanged.
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dnl
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dnl For reference, $ARFLAGS is used by automake (1.8) for its ".a" archive
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dnl file rules. This doesn't get used by the piecewise linking, so we
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dnl leave it at the default "cru".
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dnl
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dnl FIXME: Libtool 1.5.2 has its own arrangments for "cq", but that version
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dnl is broken in other ways. When we can upgrade, remove the forcible
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dnl AR_FLAGS=cq.
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AC_DEFUN([GMP_PROG_AR],
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[dnl Want to establish $AR before libtool initialization.
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AC_BEFORE([$0],[AC_PROG_LIBTOOL])
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gmp_user_AR=$AR
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AC_CHECK_TOOL(AR, ar, ar)
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if test -z "$gmp_user_AR"; then
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eval arflags=\"\$ar${abi1}_flags\"
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test -n "$arflags" || eval arflags=\"\$ar${abi2}_flags\"
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if test -n "$arflags"; then
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AC_MSG_CHECKING([for extra ar flags])
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AR="$AR $arflags"
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ac_cv_prog_AR="$AR $arflags"
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ac_cv_prog_ac_ct_AR="$AR $arflags"
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AC_MSG_RESULT([$arflags])
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fi
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fi
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if test -z "$AR_FLAGS"; then
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AR_FLAGS=cq
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fi
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])
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dnl GMP_PROG_M4
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dnl -----------
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dnl Find a working m4, either in $PATH or likely locations, and setup $M4
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dnl and an AC_SUBST accordingly. If $M4 is already set then it's a user
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dnl choice and is accepted with no checks. GMP_PROG_M4 is like
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dnl AC_PATH_PROG or AC_CHECK_PROG, but tests each m4 found to see if it's
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dnl good enough.
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dnl
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dnl See mpn/asm-defs.m4 for details on the known bad m4s.
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AC_DEFUN([GMP_PROG_M4],
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[AC_ARG_VAR(M4,[m4 macro processor])
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AC_CACHE_CHECK([for suitable m4],
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gmp_cv_prog_m4,
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[if test -n "$M4"; then
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gmp_cv_prog_m4="$M4"
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else
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cat >conftest.m4 <<\EOF
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dnl Must protect this against being expanded during autoconf m4!
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dnl Dont put "dnl"s in this as autoconf will flag an error for unexpanded
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dnl macros.
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[define(dollarhash,``$][#'')ifelse(dollarhash(x),1,`define(t1,Y)',
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``bad: $][# not supported (SunOS /usr/bin/m4)
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'')ifelse(eval(89),89,`define(t2,Y)',
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`bad: eval() doesnt support 8 or 9 in a constant (OpenBSD 2.6 m4)
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')ifelse(t1`'t2,YY,`good
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')]
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EOF
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dnl ' <- balance the quotes for emacs sh-mode
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echo "trying m4" >&AC_FD_CC
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gmp_tmp_val=`(m4 conftest.m4) 2>&AC_FD_CC`
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echo "$gmp_tmp_val" >&AC_FD_CC
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if test "$gmp_tmp_val" = good; then
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gmp_cv_prog_m4="m4"
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else
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IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS=":"
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dnl $ac_dummy forces splitting on constant user-supplied paths.
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dnl POSIX.2 word splitting is done only on the output of word expansions,
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dnl not every word. This closes a longstanding sh security hole.
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ac_dummy="$PATH:/usr/5bin"
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for ac_dir in $ac_dummy; do
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test -z "$ac_dir" && ac_dir=.
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echo "trying $ac_dir/m4" >&AC_FD_CC
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gmp_tmp_val=`($ac_dir/m4 conftest.m4) 2>&AC_FD_CC`
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echo "$gmp_tmp_val" >&AC_FD_CC
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if test "$gmp_tmp_val" = good; then
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gmp_cv_prog_m4="$ac_dir/m4"
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break
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fi
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done
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IFS="$ac_save_ifs"
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if test -z "$gmp_cv_prog_m4"; then
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AC_MSG_ERROR([No usable m4 in \$PATH or /usr/5bin (see config.log for reasons).])
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fi
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fi
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rm -f conftest.m4
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fi])
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M4="$gmp_cv_prog_m4"
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AC_SUBST(M4)
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])
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dnl GMP_M4_M4WRAP_SPURIOUS
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dnl ----------------------
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dnl Check for spurious output from m4wrap(), as described in mpn/asm-defs.m4.
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dnl
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dnl The following systems have been seen with the problem.
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dnl
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dnl - MacOS X Darwin, its assembler fails.
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dnl - NetBSD 1.4.1 m68k, and gas 1.92.3 there gives a warning and ignores
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dnl the bad last line since it doesn't have a newline.
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dnl - NetBSD 1.4.2 alpha, but its assembler doesn't seem to mind.
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dnl - HP-UX ia64.
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dnl
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dnl Enhancement: Maybe this could be in GMP_PROG_M4, and attempt to prefer
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dnl an m4 with a working m4wrap, if it can be found.
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AC_DEFUN([GMP_M4_M4WRAP_SPURIOUS],
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[AC_REQUIRE([GMP_PROG_M4])
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AC_CACHE_CHECK([if m4wrap produces spurious output],
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gmp_cv_m4_m4wrap_spurious,
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[# hide the d-n-l from autoconf's error checking
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tmp_d_n_l=d""nl
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cat >conftest.m4 <<EOF
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[changequote({,})define(x,)m4wrap({x})$tmp_d_n_l]
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EOF
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echo test input is >&AC_FD_CC
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cat conftest.m4 >&AC_FD_CC
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tmp_chars=`$M4 conftest.m4 | wc -c`
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echo produces $tmp_chars chars output >&AC_FD_CC
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rm -f conftest.m4
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if test $tmp_chars = 0; then
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gmp_cv_m4_m4wrap_spurious=no
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else
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gmp_cv_m4_m4wrap_spurious=yes
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fi
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])
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GMP_DEFINE_RAW(["define(<M4WRAP_SPURIOUS>,<$gmp_cv_m4_m4wrap_spurious>)"])
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])
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dnl GMP_PROG_NM
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dnl -----------
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dnl GMP additions to libtool AC_PROG_NM.
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dnl
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dnl Note that if AC_PROG_NM can't find a working nm it still leaves
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dnl $NM set to "nm", so $NM can't be assumed to actually work.
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dnl
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dnl A user-selected $NM is always left unchanged. AC_PROG_NM is still run
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dnl to get the "checking" message printed though.
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dnl
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dnl Perhaps it'd be worthwhile checking that nm works, by running it on an
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dnl actual object file. For instance on sparcv9 solaris old versions of
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dnl GNU nm don't recognise 64-bit objects. Checking would give a better
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dnl error message than just a failure in later tests like GMP_ASM_W32 etc.
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dnl
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dnl On the other hand it's not really normal autoconf practice to take too
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dnl much trouble over detecting a broken set of tools. And libtool doesn't
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dnl do anything at all for say ranlib or strip. So for now we're inclined
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dnl to just demand that the user provides a coherent environment.
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AC_DEFUN([GMP_PROG_NM],
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[dnl Make sure we're the first to call AC_PROG_NM, so our extra flags are
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dnl used by everyone.
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AC_BEFORE([$0],[AC_PROG_NM])
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gmp_user_NM=$NM
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AC_PROG_NM
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# FIXME: When cross compiling (ie. $ac_tool_prefix not empty), libtool
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# defaults to plain "nm" if a "${ac_tool_prefix}nm" is not found. In this
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# case run it again to try the native "nm", firstly so that likely locations
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# are searched, secondly so that -B or -p are added if necessary for BSD
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# format. This is necessary for instance on OSF with "./configure
|
|
# --build=alphaev5-dec-osf --host=alphaev6-dec-osf".
|
|
#
|
|
if test -z "$gmp_user_NM" && test -n "$ac_tool_prefix" && test "$NM" = nm; then
|
|
$as_unset lt_cv_path_NM
|
|
gmp_save_ac_tool_prefix=$ac_tool_prefix
|
|
ac_tool_prefix=
|
|
NM=
|
|
AC_PROG_NM
|
|
ac_tool_prefix=$gmp_save_ac_tool_prefix
|
|
fi
|
|
|
|
if test -z "$gmp_user_NM"; then
|
|
eval nmflags=\"\$nm${abi1}_flags\"
|
|
test -n "$nmflags" || eval nmflags=\"\$nm${abi2}_flags\"
|
|
if test -n "$nmflags"; then
|
|
AC_MSG_CHECKING([for extra nm flags])
|
|
NM="$NM $nmflags"
|
|
AC_MSG_RESULT([$nmflags])
|
|
fi
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_PROG_CC_WORKS(cc+cflags,[ACTION-IF-WORKS][,ACTION-IF-NOT-WORKS])
|
|
dnl --------------------------------------------------------------------
|
|
dnl Check if cc+cflags can compile and link.
|
|
dnl
|
|
dnl This test is designed to be run repeatedly with different cc+cflags
|
|
dnl selections, so the result is not cached.
|
|
dnl
|
|
dnl For a native build, meaning $cross_compiling == no, we require that the
|
|
dnl generated program will run. This is the same as AC_PROG_CC does in
|
|
dnl _AC_COMPILER_EXEEXT_WORKS, and checking here will ensure we don't pass
|
|
dnl a CC/CFLAGS combination that it rejects.
|
|
dnl
|
|
dnl sparc-*-solaris2.7 can compile ABI=64 but won't run it if the kernel
|
|
dnl was booted in 32-bit mode. The effect of requiring the compiler output
|
|
dnl will run is that a plain native "./configure" falls back on ABI=32, but
|
|
dnl ABI=64 is still available as a cross-compile.
|
|
dnl
|
|
dnl The various specific problems we try to detect are done in separate
|
|
dnl compiles. Although this is probably a bit slower than one test
|
|
dnl program, it makes it easy to indicate the problem in AC_MSG_RESULT,
|
|
dnl hence giving the user a clue about why we rejected the compiler.
|
|
|
|
AC_DEFUN([GMP_PROG_CC_WORKS],
|
|
[AC_MSG_CHECKING([compiler $1])
|
|
gmp_prog_cc_works=yes
|
|
|
|
# first see a simple "main()" works, then go on to other checks
|
|
GMP_PROG_CC_WORKS_PART([$1], [])
|
|
|
|
GMP_PROG_CC_WORKS_PART_MAIN([$1], [gcc-4.3.2 on 64bit is bad , try -O1 or -fno-strict-aliasing for the flags],
|
|
[/* The following aborts with gcc-4.3.2 on a 64bit system which is an unusable compiler */
|
|
#if defined(__GNUC__) && !defined(__INTEL_COMPILER)
|
|
int __attribute__((noinline))
|
|
foo(int i)
|
|
{
|
|
int *p = __builtin_malloc (4 * sizeof(int));
|
|
*p = 0;
|
|
p[i] = 1;
|
|
return *p;
|
|
}
|
|
extern void abort (void);
|
|
int main()
|
|
{
|
|
if (foo(0) != 1)
|
|
abort ();
|
|
return 0;
|
|
}
|
|
#else
|
|
int main(){return 0;}
|
|
#endif
|
|
])
|
|
|
|
GMP_PROG_CC_WORKS_PART([$1], [function pointer return],
|
|
[/* The following provokes an internal error from gcc 2.95.2 -mpowerpc64
|
|
(without -maix64), hence detecting an unusable compiler */
|
|
void *g() { return (void *) 0; }
|
|
void *f() { return g(); }
|
|
])
|
|
|
|
GMP_PROG_CC_WORKS_PART([$1], [cmov instruction],
|
|
[/* The following provokes an invalid instruction syntax from i386 gcc
|
|
-march=pentiumpro on Solaris 2.8. The native sun assembler
|
|
requires a non-standard syntax for cmov which gcc (as of 2.95.2 at
|
|
least) doesn't know. */
|
|
int n;
|
|
int cmov () { return (n >= 0 ? n : 0); }
|
|
])
|
|
|
|
GMP_PROG_CC_WORKS_PART_MAIN([$1], [double -> ulong conversion],
|
|
[/* The following provokes a linker invocation problem with gcc 3.0.3
|
|
on AIX 4.3 under "-maix64 -mpowerpc64 -mcpu=630". The -mcpu=630
|
|
option causes gcc to incorrectly select the 32-bit libgcc.a, not
|
|
the 64-bit one, and consequently it misses out on the __fixunsdfdi
|
|
helper (double -> uint64 conversion).
|
|
This also provokers errors on x86 when AVX instructions are
|
|
generated but not understood by the assembler or processor.*/
|
|
volatile double d;
|
|
volatile unsigned long u;
|
|
int main() { d = 0.1; u = (unsigned long)d; return (int)u; }
|
|
])
|
|
|
|
GMP_PROG_CC_WORKS_PART_MAIN([$1], [double negation],
|
|
[/* The following provokes an error from hppa gcc 2.95 under -mpa-risc-2-0 if
|
|
the assembler doesn't know hppa 2.0 instructions. fneg is a 2.0
|
|
instruction, and a negation like this comes out using it. */
|
|
volatile double d;
|
|
volatile double d2;
|
|
int main() { d = -0.1; d2 = -d; return (int)d2; }
|
|
])
|
|
|
|
GMP_PROG_CC_WORKS_PART_MAIN([$1], [double -> float conversion],
|
|
[/* The following makes gcc 3.3 -march=pentium4 generate an SSE2 xmm insn
|
|
(cvtsd2ss) which will provoke an error if the assembler doesn't recognise
|
|
those instructions. Not sure how much of the gmp code will come out
|
|
wanting sse2, but it's easiest to reject an option we know is bad. */
|
|
volatile double d;
|
|
volatile float f;
|
|
int main() { d = 0.1; f = (float)d; return (int)f; }
|
|
])
|
|
|
|
GMP_PROG_CC_WORKS_PART_MAIN([$1], [unsigned long/double division],
|
|
[/* The following generates a vmovd instruction on Sandy Bridge.
|
|
Check that the assembler knows this instruction. */
|
|
volatile unsigned long a;
|
|
volatile double b;
|
|
int main()
|
|
{ a = 1; b = 3; return (int)(a/b); }
|
|
])
|
|
|
|
# __builtin_alloca is not available everywhere, check it exists before
|
|
# seeing that it works
|
|
GMP_PROG_CC_WORKS_PART_TEST([$1],[__builtin_alloca availability],
|
|
[int k; int foo () { __builtin_alloca (k); }],
|
|
[GMP_PROG_CC_WORKS_PART([$1], [alloca array],
|
|
[/* The following provokes an internal compiler error from Itanium HP-UX cc
|
|
under +O2 or higher. We use this sort of code in mpn/generic/mul_fft.c. */
|
|
int k;
|
|
int foo ()
|
|
{
|
|
int i, **a;
|
|
a = __builtin_alloca (k);
|
|
for (i = 0; i <= k; i++)
|
|
a[i] = __builtin_alloca (1 << i);
|
|
}
|
|
])])
|
|
|
|
GMP_PROG_CC_WORKS_PART([$1], [long long reliability test 1],
|
|
[/* The following provokes a segfault in the compiler on powerpc-apple-darwin.
|
|
Extracted from tests/mpn/t-iord_u.c. Causes Apple's gcc 3.3 build 1640 and
|
|
1666 to segfault with e.g., -O2 -mpowerpc64. */
|
|
|
|
#ifdef __GNUC__
|
|
typedef unsigned long long t1;typedef t1*t2;
|
|
__inline__ t1 e(t2 rp,t2 up,int n,t1 v0)
|
|
{t1 c,x,r;int i;if(v0){c=1;for(i=1;i<n;i++){x=up[i];r=x+1;rp[i]=r;}}return c;}
|
|
f(){static const struct{t1 n;t1 src[9];t1 want[9];}d[]={{1,{0},{1}},};t1 got[9];int i;
|
|
for(i=0;i<1;i++){if(e(got,got,9,d[i].n)==0)h();g(i,d[i].src,d[i].n,got,d[i].want,9);if(d[i].n)h();}}
|
|
h(){}g(){}
|
|
#else
|
|
int dummy;
|
|
#endif
|
|
])
|
|
|
|
GMP_PROG_CC_WORKS_PART([$1], [long long reliability test 2],
|
|
[/* The following provokes an internal compiler error on powerpc-apple-darwin.
|
|
Extracted from mpz/cfdiv_q_2exp.c. Causes Apple's gcc 3.3 build 1640 and
|
|
1666 to get an ICE with -O1 -mpowerpc64. */
|
|
|
|
#ifdef __GNUC__
|
|
f(int u){int i;long long x;x=u?~0:0;if(x)for(i=0;i<9;i++);x&=g();if(x)g();}
|
|
g(){}
|
|
#else
|
|
int dummy;
|
|
#endif
|
|
])
|
|
|
|
GMP_PROG_CC_WORKS_PART_MAIN([$1], [mpn_lshift_com optimization],
|
|
[/* The following is mis-compiled by HP ia-64 cc version
|
|
cc: HP aC++/ANSI C B3910B A.05.55 [Dec 04 2003]
|
|
under "cc +O3", both in +DD32 and +DD64 modes. The mpn_lshift_com gets
|
|
inlined and its return value somehow botched to be 0 instead of 1. This
|
|
arises in the real mpn_lshift_com in mul_fft.c. A lower optimization
|
|
level, like +O2 seems ok. This code needs to be run to show the problem,
|
|
but that's fine, the offending cc is a native-only compiler so we don't
|
|
have to worry about cross compiling. */
|
|
|
|
unsigned long
|
|
lshift_com (rp, up, n, cnt)
|
|
unsigned long *rp;
|
|
unsigned long *up;
|
|
long n;
|
|
unsigned cnt;
|
|
{
|
|
unsigned long retval, high_limb, low_limb;
|
|
unsigned tnc;
|
|
long i;
|
|
tnc = 8 * sizeof (unsigned long) - cnt;
|
|
low_limb = *up++;
|
|
retval = low_limb >> tnc;
|
|
high_limb = low_limb << cnt;
|
|
for (i = n - 1; i != 0; i--)
|
|
{
|
|
low_limb = *up++;
|
|
*rp++ = ~(high_limb | (low_limb >> tnc));
|
|
high_limb = low_limb << cnt;
|
|
}
|
|
return retval;
|
|
}
|
|
int
|
|
main ()
|
|
{
|
|
unsigned long cy, rp[2], up[2];
|
|
up[0] = ~ 0L;
|
|
up[1] = 0;
|
|
cy = lshift_com (rp, up, 2L, 1);
|
|
if (cy != 1L)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
])
|
|
|
|
GMP_PROG_CC_WORKS_PART_MAIN([$1], [mpn_lshift_com optimization 2],
|
|
[/* The following is mis-compiled by Intel ia-64 icc version 1.8 under
|
|
"icc -O3", After several calls, the function writes parial garbage to
|
|
the result vector. Perhaps relates to the chk.a.nc insn. This code needs
|
|
to be run to show the problem, but that's fine, the offending cc is a
|
|
native-only compiler so we don't have to worry about cross compiling. */
|
|
|
|
#include <stdlib.h>
|
|
void
|
|
lshift_com (rp, up, n, cnt)
|
|
unsigned long *rp;
|
|
unsigned long *up;
|
|
long n;
|
|
unsigned cnt;
|
|
{
|
|
unsigned long high_limb, low_limb;
|
|
unsigned tnc;
|
|
long i;
|
|
up += n;
|
|
rp += n;
|
|
tnc = 8 * sizeof (unsigned long) - cnt;
|
|
low_limb = *--up;
|
|
high_limb = low_limb << cnt;
|
|
for (i = n - 1; i != 0; i--)
|
|
{
|
|
low_limb = *--up;
|
|
*--rp = ~(high_limb | (low_limb >> tnc));
|
|
high_limb = low_limb << cnt;
|
|
}
|
|
*--rp = ~high_limb;
|
|
}
|
|
int
|
|
main ()
|
|
{
|
|
unsigned long *r, *r2;
|
|
unsigned long a[88 + 1];
|
|
long i;
|
|
for (i = 0; i < 88 + 1; i++)
|
|
a[i] = ~0L;
|
|
r = malloc (10000 * sizeof (unsigned long));
|
|
r2 = r;
|
|
for (i = 0; i < 528; i += 22)
|
|
{
|
|
lshift_com (r2, a,
|
|
i / (8 * sizeof (unsigned long)) + 1,
|
|
i % (8 * sizeof (unsigned long)));
|
|
r2 += 88 + 1;
|
|
}
|
|
if (r[2048] != 0 || r[2049] != 0 || r[2050] != 0 || r[2051] != 0 ||
|
|
r[2052] != 0 || r[2053] != 0 || r[2054] != 0)
|
|
abort ();
|
|
return 0;
|
|
}
|
|
])
|
|
|
|
|
|
# A certain _GLOBAL_OFFSET_TABLE_ problem in past versions of gas, tickled
|
|
# by recent versions of gcc.
|
|
#
|
|
if test "$gmp_prog_cc_works" = yes; then
|
|
case $host in
|
|
X86_PATTERN)
|
|
# this problem only arises in PIC code, so don't need to test when
|
|
# --disable-shared. We don't necessarily have $enable_shared set to
|
|
# yes at this point, it will still be unset for the default (which is
|
|
# yes); hence the use of "!= no".
|
|
if test "$enable_shared" != no; then
|
|
GMP_PROG_CC_X86_GOT_EAX_EMITTED([$1],
|
|
[GMP_ASM_X86_GOT_EAX_OK([$1],,
|
|
[gmp_prog_cc_works="no, bad gas GOT with eax"])])
|
|
fi
|
|
;;
|
|
esac
|
|
fi
|
|
|
|
AC_MSG_RESULT($gmp_prog_cc_works)
|
|
case $gmp_prog_cc_works in
|
|
yes)
|
|
[$2]
|
|
;;
|
|
*)
|
|
[$3]
|
|
;;
|
|
esac
|
|
])
|
|
|
|
dnl Called: GMP_PROG_CC_WORKS_PART(CC+CFLAGS,FAIL-MESSAGE [,CODE])
|
|
dnl A dummy main() is appended to the CODE given.
|
|
dnl
|
|
AC_DEFUN([GMP_PROG_CC_WORKS_PART],
|
|
[GMP_PROG_CC_WORKS_PART_MAIN([$1],[$2],
|
|
[$3]
|
|
[int main () { return 0; }])
|
|
])
|
|
|
|
dnl Called: GMP_PROG_CC_WORKS_PART_MAIN(CC+CFLAGS,FAIL-MESSAGE,CODE)
|
|
dnl CODE must include a main().
|
|
dnl
|
|
AC_DEFUN([GMP_PROG_CC_WORKS_PART_MAIN],
|
|
[GMP_PROG_CC_WORKS_PART_TEST([$1],[$2],[$3],
|
|
[],
|
|
gmp_prog_cc_works="no[]m4_if([$2],,,[[, ]])[$2]",
|
|
gmp_prog_cc_works="no[]m4_if([$2],,,[[, ]])[$2][[, program does not run]]")
|
|
])
|
|
|
|
dnl Called: GMP_PROG_CC_WORKS_PART_TEST(CC+CFLAGS,TITLE,[CODE],
|
|
dnl [ACTION-GOOD],[ACTION-BAD][ACTION-NORUN])
|
|
dnl
|
|
AC_DEFUN([GMP_PROG_CC_WORKS_PART_TEST],
|
|
[if test "$gmp_prog_cc_works" = yes; then
|
|
# remove anything that might look like compiler output to our "||" expression
|
|
rm -f conftest* a.out b.out a.exe a_out.exe
|
|
cat >conftest.c <<EOF
|
|
[$3]
|
|
EOF
|
|
echo "Test compile: [$2]" >&AC_FD_CC
|
|
gmp_compile="$1 conftest.c >&AC_FD_CC"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
cc_works_part=yes
|
|
if test "$cross_compiling" = no; then
|
|
if AC_TRY_COMMAND([./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest]); then :;
|
|
else
|
|
cc_works_part=norun
|
|
fi
|
|
fi
|
|
else
|
|
cc_works_part=no
|
|
fi
|
|
if test "$cc_works_part" != yes; then
|
|
echo "failed program was:" >&AC_FD_CC
|
|
cat conftest.c >&AC_FD_CC
|
|
fi
|
|
rm -f conftest* a.out b.out a.exe a_out.exe
|
|
case $cc_works_part in
|
|
yes)
|
|
$4
|
|
;;
|
|
no)
|
|
$5
|
|
;;
|
|
norun)
|
|
$6
|
|
;;
|
|
esac
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_PROG_CC_WORKS_LONGLONG(cc+cflags,[ACTION-YES][,ACTION-NO])
|
|
dnl --------------------------------------------------------------
|
|
dnl Check that cc+cflags accepts "long long".
|
|
dnl
|
|
dnl This test is designed to be run repeatedly with different cc+cflags
|
|
dnl selections, so the result is not cached.
|
|
|
|
AC_DEFUN([GMP_PROG_CC_WORKS_LONGLONG],
|
|
[AC_MSG_CHECKING([compiler $1 has long long])
|
|
cat >conftest.c <<EOF
|
|
long long foo;
|
|
long long bar () { return foo; }
|
|
int main () { return 0; }
|
|
EOF
|
|
gmp_prog_cc_works=no
|
|
gmp_compile="$1 -c conftest.c >&AC_FD_CC"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
gmp_prog_cc_works=yes
|
|
else
|
|
echo "failed program was:" >&AC_FD_CC
|
|
cat conftest.c >&AC_FD_CC
|
|
fi
|
|
rm -f conftest* a.out b.out a.exe a_out.exe
|
|
AC_MSG_RESULT($gmp_prog_cc_works)
|
|
if test $gmp_prog_cc_works = yes; then
|
|
ifelse([$2],,:,[$2])
|
|
else
|
|
ifelse([$3],,:,[$3])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_C_TEST_SIZEOF(cc/cflags,test,[ACTION-GOOD][,ACTION-BAD])
|
|
dnl ------------------------------------------------------------
|
|
dnl The given cc/cflags compiler is run to check the size of a type
|
|
dnl specified by the "test" argument. "test" can either be a string, or a
|
|
dnl variable like $foo. The value should be for instance "sizeof-long-4",
|
|
dnl to test that sizeof(long)==4.
|
|
dnl
|
|
dnl This test is designed to be run for different compiler and/or flags
|
|
dnl combinations, so the result is not cached.
|
|
dnl
|
|
dnl The idea for making an array that has a negative size if the desired
|
|
dnl condition test is false comes from autoconf AC_CHECK_SIZEOF. The cast
|
|
dnl to "long" in the array dimension also follows autoconf, apparently it's
|
|
dnl a workaround for a HP compiler bug.
|
|
|
|
AC_DEFUN([GMP_C_TEST_SIZEOF],
|
|
[echo "configure: testlist $2" >&AC_FD_CC
|
|
[gmp_sizeof_type=`echo "$2" | sed 's/sizeof-\([a-z]*\).*/\1/'`]
|
|
[gmp_sizeof_want=`echo "$2" | sed 's/sizeof-[a-z]*-\([0-9]*\).*/\1/'`]
|
|
AC_MSG_CHECKING([compiler $1 has sizeof($gmp_sizeof_type)==$gmp_sizeof_want])
|
|
cat >conftest.c <<EOF
|
|
[int
|
|
main ()
|
|
{
|
|
static int test_array [1 - 2 * (long) (sizeof ($gmp_sizeof_type) != $gmp_sizeof_want)];
|
|
test_array[0] = 0;
|
|
return 0;
|
|
}]
|
|
EOF
|
|
gmp_c_testlist_sizeof=no
|
|
gmp_compile="$1 -c conftest.c >&AC_FD_CC"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
gmp_c_testlist_sizeof=yes
|
|
fi
|
|
rm -f conftest*
|
|
AC_MSG_RESULT($gmp_c_testlist_sizeof)
|
|
if test $gmp_c_testlist_sizeof = yes; then
|
|
ifelse([$3],,:,[$3])
|
|
else
|
|
ifelse([$4],,:,[$4])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_PROG_CC_IS_GNU(CC,[ACTIONS-IF-YES][,ACTIONS-IF-NO])
|
|
dnl -------------------------------------------------------
|
|
dnl Determine whether the given compiler is GNU C.
|
|
dnl
|
|
dnl This test is the same as autoconf _AC_LANG_COMPILER_GNU, but doesn't
|
|
dnl cache the result. The same "ifndef" style test is used, to avoid
|
|
dnl problems with syntax checking cpp's used on NeXT and Apple systems.
|
|
|
|
AC_DEFUN([GMP_PROG_CC_IS_GNU],
|
|
[cat >conftest.c <<EOF
|
|
#if ! defined (__GNUC__) || defined (__INTEL_COMPILER) || defined (__PATHCC__)
|
|
choke me
|
|
#endif
|
|
EOF
|
|
gmp_compile="$1 -c conftest.c >&AC_FD_CC"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
rm -f conftest*
|
|
AC_MSG_CHECKING([whether $1 is gcc])
|
|
AC_MSG_RESULT(yes)
|
|
ifelse([$2],,:,[$2])
|
|
else
|
|
rm -f conftest*
|
|
ifelse([$3],,:,[$3])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_PROG_CC_IS_XLC(CC,[ACTIONS-IF-YES][,ACTIONS-IF-NO])
|
|
dnl -------------------------------------------------------
|
|
dnl Determine whether the given compiler is IBM xlc (on AIX).
|
|
dnl
|
|
dnl There doesn't seem to be a preprocessor symbol to test for this, or if
|
|
dnl there is one then it's well hidden in xlc 3.1 on AIX 4.3, so just grep
|
|
dnl the man page printed when xlc is invoked with no arguments.
|
|
|
|
AC_DEFUN([GMP_PROG_CC_IS_XLC],
|
|
[gmp_command="$1 2>&1 | grep xlc >/dev/null"
|
|
if AC_TRY_EVAL(gmp_command); then
|
|
AC_MSG_CHECKING([whether $1 is xlc])
|
|
AC_MSG_RESULT(yes)
|
|
ifelse([$2],,:,[$2])
|
|
else
|
|
ifelse([$3],,:,[$3])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_PROG_CC_X86_GOT_EAX_EMITTED(CC+CFLAGS, [ACTION-YES] [, ACTION-NO])
|
|
dnl ----------------------------------------------------------------------
|
|
dnl Determine whether CC+CFLAGS emits instructions using %eax with
|
|
dnl _GLOBAL_OFFSET_TABLE_. This test is for use on x86 systems.
|
|
dnl
|
|
dnl Recent versions of gcc will use %eax for the GOT in leaf functions, for
|
|
dnl instance gcc 3.3.3 with -O3. This avoids having to save and restore
|
|
dnl %ebx which otherwise usually holds the GOT, and is what gcc used in the
|
|
dnl past.
|
|
dnl
|
|
dnl %ecx and %edx are also candidates for this sort of optimization, and
|
|
dnl are used under lesser optimization levels, like -O2 in 3.3.3. FIXME:
|
|
dnl It's not quite clear what the conditions for using %eax are, we might
|
|
dnl need more test code to provoke it.
|
|
dnl
|
|
dnl The motivation for this test is that past versions of gas have bugs
|
|
dnl affecting this usage, see GMP_ASM_X86_GOT_EAX_OK.
|
|
dnl
|
|
dnl This test is not specific to gcc, other compilers might emit %eax GOT
|
|
dnl insns like this, though we've not investigated that.
|
|
dnl
|
|
dnl This is for use by compiler probing in GMP_PROG_CC_WORKS, so we doesn't
|
|
dnl cache the result.
|
|
dnl
|
|
dnl -fPIC is hard coded here, because this test is for use before libtool
|
|
dnl has established the pic options. It's right for gcc, but perhaps not
|
|
dnl other compilers.
|
|
|
|
AC_DEFUN([GMP_PROG_CC_X86_GOT_EAX_EMITTED],
|
|
[echo "Testing gcc GOT with eax emitted" >&AC_FD_CC
|
|
cat >conftest.c <<\EOF
|
|
[int foo;
|
|
int bar () { return foo; }
|
|
]EOF
|
|
tmp_got_emitted=no
|
|
gmp_compile="$1 -fPIC -S conftest.c >&AC_FD_CC 2>&1"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
if grep "addl.*_GLOBAL_OFFSET_TABLE_.*eax" conftest.s >/dev/null; then
|
|
tmp_got_emitted=yes
|
|
fi
|
|
fi
|
|
rm -f conftest.*
|
|
echo "Result: $tmp_got_emitted" >&AC_FD_CC
|
|
if test "$tmp_got_emitted" = yes; then
|
|
ifelse([$2],,:,[$2])
|
|
else
|
|
ifelse([$3],,:,[$3])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_HPC_HPPA_2_0(cc,[ACTION-IF-GOOD][,ACTION-IF-BAD])
|
|
dnl ---------------------------------------------------------
|
|
dnl Find out whether a HP compiler is good enough to generate hppa 2.0.
|
|
dnl
|
|
dnl This test might be repeated for different compilers, so the result is
|
|
dnl not cached.
|
|
|
|
AC_DEFUN([GMP_HPC_HPPA_2_0],
|
|
[AC_MSG_CHECKING([whether HP compiler $1 is good for 64-bits])
|
|
# Bad compiler output:
|
|
# ccom: HP92453-01 G.10.32.05 HP C Compiler
|
|
# Good compiler output:
|
|
# ccom: HP92453-01 A.10.32.30 HP C Compiler
|
|
# Let A.10.32.30 or higher be ok.
|
|
echo >conftest.c
|
|
gmp_tmp_vs=`$1 $2 -V -c -o conftest.$OBJEXT conftest.c 2>&1 | grep "^ccom:"`
|
|
echo "Version string: $gmp_tmp_vs" >&AC_FD_CC
|
|
rm conftest*
|
|
gmp_tmp_v1=`echo $gmp_tmp_vs | sed 's/.* .\.\([[0-9]]*\).*/\1/'`
|
|
gmp_tmp_v2=`echo $gmp_tmp_vs | sed 's/.* .\..*\.\(.*\)\..* HP C.*/\1/'`
|
|
gmp_tmp_v3=`echo $gmp_tmp_vs | sed 's/.* .\..*\..*\.\(.*\) HP C.*/\1/'`
|
|
echo "Version number: $gmp_tmp_v1.$gmp_tmp_v2.$gmp_tmp_v3" >&AC_FD_CC
|
|
if test -z "$gmp_tmp_v1"; then
|
|
gmp_hpc_64bit=not-applicable
|
|
else
|
|
GMP_COMPARE_GE($gmp_tmp_v1, 10, $gmp_tmp_v2, 32, $gmp_tmp_v3, 30)
|
|
gmp_hpc_64bit=$gmp_compare_ge
|
|
fi
|
|
AC_MSG_RESULT($gmp_hpc_64bit)
|
|
if test $gmp_hpc_64bit = yes; then
|
|
ifelse([$2],,:,[$2])
|
|
else
|
|
ifelse([$3],,:,[$3])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_GCC_ARM_UMODSI(CC,[ACTIONS-IF-GOOD][,ACTIONS-IF-BAD])
|
|
dnl ---------------------------------------------------------
|
|
dnl gcc 2.95.3 and earlier on arm has a bug in the libgcc __umodsi routine
|
|
dnl making "%" give wrong results for some operands, eg. "0x90000000 % 3".
|
|
dnl We're hoping it'll be fixed in 2.95.4, and we know it'll be fixed in
|
|
dnl gcc 3.
|
|
dnl
|
|
dnl There's only a couple of places gmp cares about this, one is the
|
|
dnl size==1 case in mpn/generic/mode1o.c, and this shows up in
|
|
dnl tests/mpz/t-jac.c as a wrong result from mpz_kronecker_ui.
|
|
|
|
AC_DEFUN([GMP_GCC_ARM_UMODSI],
|
|
[AC_MSG_CHECKING([whether ARM gcc unsigned division works])
|
|
tmp_version=`$1 --version`
|
|
echo "$tmp_version" >&AC_FD_CC
|
|
case $tmp_version in
|
|
[2.95 | 2.95.[123]])
|
|
ifelse([$3],,:,[$3])
|
|
gmp_gcc_arm_umodsi_result=["no, gcc 2.95.[0123]"] ;;
|
|
*)
|
|
ifelse([$2],,:,[$2])
|
|
gmp_gcc_arm_umodsi_result=yes ;;
|
|
esac
|
|
AC_MSG_RESULT([$gmp_gcc_arm_umodsi_result])
|
|
])
|
|
|
|
|
|
dnl GMP_GCC_MIPS_O32(gcc,[actions-yes][,[actions-no]])
|
|
dnl -------------------------------------------------
|
|
dnl Test whether gcc supports o32.
|
|
dnl
|
|
dnl gcc 2.7.2.2 only does o32, and doesn't accept -mabi=32.
|
|
dnl
|
|
dnl gcc 2.95 accepts -mabi=32 but it only works on irix5, on irix6 it gives
|
|
dnl "cc1: The -mabi=32 support does not work yet".
|
|
|
|
AC_DEFUN([GMP_GCC_MIPS_O32],
|
|
[AC_MSG_CHECKING([whether gcc supports o32])
|
|
echo 'int x;' >conftest.c
|
|
echo "$1 -mabi=32 -c conftest.c" >&AC_FD_CC
|
|
if $1 -mabi=32 -c conftest.c >conftest.out 2>&1; then
|
|
result=yes
|
|
else
|
|
cat conftest.out >&AC_FD_CC
|
|
if grep "cc1: Invalid option \`abi=32'" conftest.out >/dev/null; then
|
|
result=yes
|
|
else
|
|
result=no
|
|
fi
|
|
fi
|
|
rm -f conftest.*
|
|
AC_MSG_RESULT($result)
|
|
if test $result = yes; then
|
|
ifelse([$2],,:,[$2])
|
|
else
|
|
ifelse([$3],,:,[$3])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_GCC_NO_CPP_PRECOMP(CCBASE,CC,CFLAGS,[ACTIONS-YES][,ACTIONS-NO])
|
|
dnl -------------------------------------------------------------------
|
|
dnl Check whether -no-cpp-precomp should be used on this compiler, and
|
|
dnl execute the corresponding ACTIONS-YES or ACTIONS-NO.
|
|
dnl
|
|
dnl -no-cpp-precomp is only meant for Apple's hacked version of gcc found
|
|
dnl on powerpc*-*-darwin*, but we can give it a try on any gcc. Normal gcc
|
|
dnl (as of 3.0 at least) only gives a warning, not an actual error, and we
|
|
dnl watch for that and decide against the option in that case, to avoid
|
|
dnl confusing the user.
|
|
|
|
AC_DEFUN([GMP_GCC_NO_CPP_PRECOMP],
|
|
[if test "$ccbase" = gcc; then
|
|
AC_MSG_CHECKING([compiler $2 $3 -no-cpp-precomp])
|
|
result=no
|
|
cat >conftest.c <<EOF
|
|
int main () { return 0; }
|
|
EOF
|
|
gmp_compile="$2 $3 -no-cpp-precomp conftest.c >conftest.out 2>&1"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
if grep "unrecognized option.*-no-cpp-precomp" conftest.out >/dev/null; then : ;
|
|
else
|
|
result=yes
|
|
fi
|
|
fi
|
|
cat conftest.out >&AC_FD_CC
|
|
rm -f conftest* a.out b.out a.exe a_out.exe
|
|
AC_MSG_RESULT($result)
|
|
if test "$result" = yes; then
|
|
ifelse([$4],,:,[$4])
|
|
else
|
|
ifelse([$5],,:,[$5])
|
|
fi
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_GCC_PENTIUM4_SSE2(CC+CFLAGS,[ACTION-IF-YES][,ACTION-IF-NO])
|
|
dnl ---------------------------------------------------------------
|
|
dnl Determine whether gcc CC+CFLAGS is a good enough version for
|
|
dnl -march=pentium4 with sse2.
|
|
dnl
|
|
dnl Gcc 3.2.1 was seen generating incorrect code for raw double -> int
|
|
dnl conversions through a union. We believe the problem is in all 3.1 and
|
|
dnl 3.2 versions, but that it's fixed in 3.3.
|
|
|
|
AC_DEFUN([GMP_GCC_PENTIUM4_SSE2],
|
|
[AC_MSG_CHECKING([whether gcc is good for sse2])
|
|
case `$1 -dumpversion` in
|
|
[3.[012] | 3.[012].*]) result=no ;;
|
|
*) result=yes ;;
|
|
esac
|
|
AC_MSG_RESULT($result)
|
|
if test "$result" = yes; then
|
|
ifelse([$2],,:,[$2])
|
|
else
|
|
ifelse([$3],,:,[$3])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_GCC_WA_MCPU(CC+CFLAGS, NEWFLAG [,ACTION-YES [,ACTION-NO]])
|
|
dnl --------------------------------------------------------------
|
|
dnl Check whether gcc (or gas rather) accepts a flag like "-Wa,-mev67".
|
|
dnl
|
|
dnl Gas doesn't give an error for an unknown cpu, it only prints a warning
|
|
dnl like "Warning: Unknown CPU identifier `ev78'".
|
|
dnl
|
|
dnl This is intended for use on alpha, since only recent versions of gas
|
|
dnl accept -mev67, but there's nothing here that's alpha specific.
|
|
|
|
AC_DEFUN([GMP_GCC_WA_MCPU],
|
|
[AC_MSG_CHECKING([assembler $1 $2])
|
|
result=no
|
|
cat >conftest.c <<EOF
|
|
int main () {}
|
|
EOF
|
|
gmp_compile="$1 $2 -c conftest.c >conftest.out 2>&1"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
if grep "Unknown CPU identifier" conftest.out >/dev/null; then : ;
|
|
else
|
|
result=yes
|
|
fi
|
|
fi
|
|
cat conftest.out >&AC_FD_CC
|
|
rm -f conftest*
|
|
AC_MSG_RESULT($result)
|
|
if test "$result" = yes; then
|
|
ifelse([$3],,:,[$3])
|
|
else
|
|
ifelse([$4],,:,[$4])
|
|
fi
|
|
])
|
|
|
|
dnl GMP_OS_X86_XMM(CC+CFLAGS,[ACTION-IF-YES][,ACTION-IF-NO])
|
|
dnl --------------------------------------------------------
|
|
dnl Determine whether the operating system supports XMM registers.
|
|
dnl
|
|
dnl If build==host then a test program is run, executing an SSE2
|
|
dnl instruction using an XMM register. This will give a SIGILL if the
|
|
dnl system hasn't set the OSFXSR bit in CR4 to say it knows it must use
|
|
dnl fxsave/fxrestor in a context switch (to save xmm registers).
|
|
dnl
|
|
dnl If build!=host, we can fallback on:
|
|
dnl
|
|
dnl - FreeBSD version 4 is the first supporting xmm.
|
|
dnl
|
|
dnl - Linux kernel 2.4 might be the first stable series supporting xmm
|
|
dnl (not sure). But there's no version number in the GNU/Linux
|
|
dnl config tuple to test anyway.
|
|
dnl
|
|
dnl The default is to allow xmm. This might seem rash, but it's likely
|
|
dnl most systems know xmm by now, so this will normally be what's wanted.
|
|
dnl And cross compiling is a bit hairy anyway, so hopefully anyone doing it
|
|
dnl will be smart enough to know what to do.
|
|
dnl
|
|
dnl In the test program, .text and .globl are hard coded because this macro
|
|
dnl is wanted before GMP_ASM_TEXT and GMP_ASM_GLOBL are run. A .byte
|
|
dnl sequence is used (for xorps %xmm0, %xmm0) to make us independent of
|
|
dnl tests for whether the assembler supports sse2/xmm. Obviously we need
|
|
dnl both assembler and OS support, but this means we don't force the order
|
|
dnl in which we test.
|
|
dnl
|
|
dnl FIXME: Maybe we should use $CCAS to assemble, if it's set. (Would
|
|
dnl still want $CC/$CFLAGS for the link.) But this test is used before
|
|
dnl AC_PROG_CC sets $OBJEXT, so we'd need to check for various object file
|
|
dnl suffixes ourselves.
|
|
|
|
AC_DEFUN([GMP_OS_X86_XMM],
|
|
[AC_CACHE_CHECK([whether the operating system supports XMM registers],
|
|
gmp_cv_os_x86_xmm,
|
|
[if test "$build" = "$host"; then
|
|
# remove anything that might look like compiler output to our "||" expression
|
|
rm -f conftest* a.out b.out a.exe a_out.exe
|
|
cat >conftest.s <<EOF
|
|
.text
|
|
main:
|
|
_main:
|
|
.globl main
|
|
.globl _main
|
|
.byte 0x0f, 0x57, 0xc0
|
|
xorl %eax, %eax
|
|
ret
|
|
EOF
|
|
gmp_compile="$1 conftest.s -o conftest >&AC_FD_CC"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
if AC_TRY_COMMAND([./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest]); then
|
|
gmp_cv_os_x86_xmm=yes
|
|
else
|
|
gmp_cv_os_x86_xmm=no
|
|
fi
|
|
else
|
|
AC_MSG_WARN([Oops, cannot compile test program])
|
|
fi
|
|
rm -f conftest*
|
|
fi
|
|
|
|
if test -z "$gmp_cv_os_x86_xmm"; then
|
|
case $host_os in
|
|
[freebsd[123] | freebsd[123].*])
|
|
gmp_cv_os_x86_xmm=no ;;
|
|
freebsd*)
|
|
gmp_cv_os_x86_xmm=yes ;;
|
|
*)
|
|
gmp_cv_os_x86_xmm=probably ;;
|
|
esac
|
|
fi
|
|
])
|
|
|
|
if test "$gmp_cv_os_x86_xmm" = probably; then
|
|
AC_MSG_WARN([Not certain of OS support for xmm when cross compiling.])
|
|
AC_MSG_WARN([Will assume it's ok, expect a SIGILL if this is wrong.])
|
|
fi
|
|
|
|
case $gmp_cv_os_x86_xmm in
|
|
no)
|
|
$3
|
|
;;
|
|
*)
|
|
$2
|
|
;;
|
|
esac
|
|
])
|
|
|
|
dnl GMP_HPPA_LEVEL_20(cc/cflags [, ACTION-GOOD [,ACTION-BAD]])
|
|
dnl ----------------------------------------------------------
|
|
dnl Check that the given cc/cflags accepts HPPA 2.0n assembler code.
|
|
dnl
|
|
dnl Old versions of gas don't know 2.0 instructions. It rejects ".level
|
|
dnl 2.0" for a start, so just test that.
|
|
dnl
|
|
dnl This test is designed to be run for various different compiler and
|
|
dnl flags combinations, and hence doesn't cache its result.
|
|
|
|
AC_DEFUN([GMP_HPPA_LEVEL_20],
|
|
[AC_MSG_CHECKING([$1 assembler knows hppa 2.0])
|
|
result=no
|
|
cat >conftest.s <<EOF
|
|
.level 2.0
|
|
EOF
|
|
gmp_compile="$1 -c conftest.s >&AC_FD_CC 2>&1"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
result=yes
|
|
else
|
|
echo "failed program was" >&AC_FD_CC
|
|
cat conftest.s >&AC_FD_CC
|
|
fi
|
|
rm -f conftest*
|
|
AC_MSG_RESULT($result)
|
|
if test "$result" = yes; then
|
|
ifelse([$2],,:,[$2])
|
|
else
|
|
ifelse([$3],,:,[$3])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_PROG_CXX_WORKS(cxx/cxxflags [, ACTION-YES [,ACTION-NO]])
|
|
dnl ------------------------------------------------------------
|
|
dnl Check whether cxx/cxxflags can compile and link.
|
|
dnl
|
|
dnl This test is designed to be run repeatedly with different cxx/cxxflags
|
|
dnl selections, so the result is not cached.
|
|
dnl
|
|
dnl For a native build, we insist on being able to run the program, so as
|
|
dnl to detect any problems with the standard C++ library. During
|
|
dnl development various systems with broken or incomplete C++ installations
|
|
dnl were seen.
|
|
dnl
|
|
dnl The various features and problems we try to detect are done in separate
|
|
dnl compiles. Although this is probably a bit slower than one test
|
|
dnl program, it makes it easy to indicate the problem in AC_MSG_RESULT,
|
|
dnl hence giving the user a clue about why we rejected the compiler.
|
|
|
|
AC_DEFUN([GMP_PROG_CXX_WORKS],
|
|
[AC_MSG_CHECKING([C++ compiler $1])
|
|
gmp_prog_cxx_works=yes
|
|
|
|
# start with a plain "main()", then go on to further checks
|
|
GMP_PROG_CXX_WORKS_PART([$1], [])
|
|
|
|
GMP_PROG_CXX_WORKS_PART([$1], [namespace],
|
|
[namespace foo { }
|
|
using namespace foo;
|
|
])
|
|
|
|
# GMP requires the standard C++ iostream classes
|
|
GMP_PROG_CXX_WORKS_PART([$1], [std iostream],
|
|
[/* This test rejects g++ 2.7.2 which doesn't have <iostream>, only a
|
|
pre-standard iostream.h. */
|
|
#include <iostream>
|
|
|
|
/* This test rejects OSF 5.1 Compaq C++ in its default pre-standard iostream
|
|
mode, since that mode puts cout in the global namespace, not "std". */
|
|
void someoutput (void) { std::cout << 123; }
|
|
])
|
|
|
|
AC_MSG_RESULT($gmp_prog_cxx_works)
|
|
case $gmp_prog_cxx_works in
|
|
yes)
|
|
[$2]
|
|
;;
|
|
*)
|
|
[$3]
|
|
;;
|
|
esac
|
|
])
|
|
|
|
dnl Called: GMP_PROG_CXX_WORKS_PART(CXX+CXXFLAGS, FAIL-MESSAGE [,CODE])
|
|
dnl
|
|
AC_DEFUN([GMP_PROG_CXX_WORKS_PART],
|
|
[if test "$gmp_prog_cxx_works" = yes; then
|
|
# remove anything that might look like compiler output to our "||" expression
|
|
rm -f conftest* a.out b.out a.exe a_out.exe
|
|
cat >conftest.cc <<EOF
|
|
[$3]
|
|
int main (void) { return 0; }
|
|
EOF
|
|
echo "Test compile: [$2]" >&AC_FD_CC
|
|
gmp_cxxcompile="$1 conftest.cc >&AC_FD_CC"
|
|
if AC_TRY_EVAL(gmp_cxxcompile); then
|
|
if test "$cross_compiling" = no; then
|
|
if AC_TRY_COMMAND([./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest]); then :;
|
|
else
|
|
gmp_prog_cxx_works="no[]m4_if([$2],,,[, ])[$2], program does not run"
|
|
fi
|
|
fi
|
|
else
|
|
gmp_prog_cxx_works="no[]m4_if([$2],,,[, ])[$2]"
|
|
fi
|
|
case $gmp_prog_cxx_works in
|
|
no*)
|
|
echo "failed program was:" >&AC_FD_CC
|
|
cat conftest.cc >&AC_FD_CC
|
|
;;
|
|
esac
|
|
rm -f conftest* a.out b.out a.exe a_out.exe
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_INIT([M4-DEF-FILE])
|
|
dnl -----------------------
|
|
dnl Initializations for GMP config.m4 generation.
|
|
dnl
|
|
dnl FIXME: The generated config.m4 doesn't get recreated by config.status.
|
|
dnl Maybe the relevant "echo"s should go through AC_CONFIG_COMMANDS.
|
|
|
|
AC_DEFUN([GMP_INIT],
|
|
[ifelse([$1], , gmp_configm4=config.m4, gmp_configm4="[$1]")
|
|
gmp_tmpconfigm4=cnfm4.tmp
|
|
gmp_tmpconfigm4i=cnfm4i.tmp
|
|
gmp_tmpconfigm4p=cnfm4p.tmp
|
|
rm -f $gmp_tmpconfigm4 $gmp_tmpconfigm4i $gmp_tmpconfigm4p
|
|
|
|
# CONFIG_TOP_SRCDIR is a path from the mpn builddir to the top srcdir.
|
|
# The pattern here tests for an absolute path the same way as
|
|
# _AC_OUTPUT_FILES in autoconf acgeneral.m4.
|
|
case $srcdir in
|
|
[[\\/]]* | ?:[[\\/]]* ) tmp="$srcdir" ;;
|
|
*) tmp="../$srcdir" ;;
|
|
esac
|
|
echo ["define(<CONFIG_TOP_SRCDIR>,<\`$tmp'>)"] >>$gmp_tmpconfigm4
|
|
|
|
# All CPUs use asm-defs.m4
|
|
echo ["include][(CONFIG_TOP_SRCDIR\`/mpn/asm-defs.m4')"] >>$gmp_tmpconfigm4i
|
|
])
|
|
|
|
|
|
dnl GMP_FINISH
|
|
dnl ----------
|
|
dnl Create config.m4 from its accumulated parts.
|
|
dnl
|
|
dnl __CONFIG_M4_INCLUDED__ is used so that a second or subsequent include
|
|
dnl of config.m4 is harmless.
|
|
dnl
|
|
dnl A separate ifdef on the angle bracket quoted part ensures the quoting
|
|
dnl style there is respected. The basic defines from gmp_tmpconfigm4 are
|
|
dnl fully quoted but are still put under an ifdef in case any have been
|
|
dnl redefined by one of the m4 include files.
|
|
dnl
|
|
dnl Doing a big ifdef within asm-defs.m4 and/or other macro files wouldn't
|
|
dnl work, since it'd interpret parentheses and quotes in dnl comments, and
|
|
dnl having a whole file as a macro argument would overflow the string space
|
|
dnl on BSD m4.
|
|
|
|
AC_DEFUN([GMP_FINISH],
|
|
[AC_REQUIRE([GMP_INIT])
|
|
echo "creating $gmp_configm4"
|
|
echo ["d""nl $gmp_configm4. Generated automatically by configure."] > $gmp_configm4
|
|
if test -f $gmp_tmpconfigm4; then
|
|
echo ["changequote(<,>)"] >> $gmp_configm4
|
|
echo ["ifdef(<__CONFIG_M4_INCLUDED__>,,<"] >> $gmp_configm4
|
|
cat $gmp_tmpconfigm4 >> $gmp_configm4
|
|
echo [">)"] >> $gmp_configm4
|
|
echo ["changequote(\`,')"] >> $gmp_configm4
|
|
rm $gmp_tmpconfigm4
|
|
fi
|
|
echo ["ifdef(\`__CONFIG_M4_INCLUDED__',,\`"] >> $gmp_configm4
|
|
if test -f $gmp_tmpconfigm4i; then
|
|
cat $gmp_tmpconfigm4i >> $gmp_configm4
|
|
rm $gmp_tmpconfigm4i
|
|
fi
|
|
if test -f $gmp_tmpconfigm4p; then
|
|
cat $gmp_tmpconfigm4p >> $gmp_configm4
|
|
rm $gmp_tmpconfigm4p
|
|
fi
|
|
echo ["')"] >> $gmp_configm4
|
|
echo ["define(\`__CONFIG_M4_INCLUDED__')"] >> $gmp_configm4
|
|
])
|
|
|
|
|
|
dnl GMP_INCLUDE_MPN(FILE)
|
|
dnl ---------------------
|
|
dnl Add an include_mpn(`FILE') to config.m4. FILE should be a path
|
|
dnl relative to the mpn source directory, for example
|
|
dnl
|
|
dnl GMP_INCLUDE_MPN(`x86/x86-defs.m4')
|
|
dnl
|
|
|
|
AC_DEFUN([GMP_INCLUDE_MPN],
|
|
[AC_REQUIRE([GMP_INIT])
|
|
echo ["include_mpn(\`$1')"] >> $gmp_tmpconfigm4i
|
|
])
|
|
|
|
|
|
dnl GMP_DEFINE(MACRO, DEFINITION [, LOCATION])
|
|
dnl ------------------------------------------
|
|
dnl Define M4 macro MACRO as DEFINITION in temporary file.
|
|
dnl
|
|
dnl If LOCATION is `POST', the definition will appear after any include()
|
|
dnl directives inserted by GMP_INCLUDE. Mind the quoting! No shell
|
|
dnl variables will get expanded. Don't forget to invoke GMP_FINISH to
|
|
dnl create file config.m4. config.m4 uses `<' and '>' as quote characters
|
|
dnl for all defines.
|
|
|
|
AC_DEFUN([GMP_DEFINE],
|
|
[AC_REQUIRE([GMP_INIT])
|
|
echo ['define(<$1>, <$2>)'] >>ifelse([$3], [POST],
|
|
$gmp_tmpconfigm4p, $gmp_tmpconfigm4)
|
|
])
|
|
|
|
|
|
dnl GMP_DEFINE_RAW(STRING [, LOCATION])
|
|
dnl ------------------------------------
|
|
dnl Put STRING into config.m4 file.
|
|
dnl
|
|
dnl If LOCATION is `POST', the definition will appear after any include()
|
|
dnl directives inserted by GMP_INCLUDE. Don't forget to invoke GMP_FINISH
|
|
dnl to create file config.m4.
|
|
|
|
AC_DEFUN([GMP_DEFINE_RAW],
|
|
[AC_REQUIRE([GMP_INIT])
|
|
echo [$1] >> ifelse([$2], [POST], $gmp_tmpconfigm4p, $gmp_tmpconfigm4)
|
|
])
|
|
|
|
|
|
dnl GMP_TRY_ASSEMBLE(asm-code,[action-success][,action-fail])
|
|
dnl ----------------------------------------------------------
|
|
dnl Attempt to assemble the given code.
|
|
dnl Do "action-success" if this succeeds, "action-fail" if not.
|
|
dnl
|
|
dnl conftest.o and conftest.out are available for inspection in
|
|
dnl "action-success". If either action does a "break" out of a loop then
|
|
dnl an explicit "rm -f conftest*" will be necessary.
|
|
dnl
|
|
dnl This is not unlike AC_TRY_COMPILE, but there's no default includes or
|
|
dnl anything in "asm-code", everything wanted must be given explicitly.
|
|
|
|
AC_DEFUN([GMP_TRY_ASSEMBLE],
|
|
[cat >conftest.s <<EOF
|
|
[$1]
|
|
EOF
|
|
gmp_assemble="$CCAS $CFLAGS $CPPFLAGS conftest.s >conftest.out 2>&1"
|
|
if AC_TRY_EVAL(gmp_assemble); then
|
|
cat conftest.out >&AC_FD_CC
|
|
ifelse([$2],,:,[$2])
|
|
else
|
|
cat conftest.out >&AC_FD_CC
|
|
echo "configure: failed program was:" >&AC_FD_CC
|
|
cat conftest.s >&AC_FD_CC
|
|
ifelse([$3],,:,[$3])
|
|
fi
|
|
rm -f conftest*
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_LABEL_SUFFIX
|
|
dnl --------------------
|
|
dnl : - is usual.
|
|
dnl empty - hppa on HP-UX doesn't use a :, just the label name
|
|
dnl
|
|
dnl Note that it's necessary to test the empty case first, since HP "as"
|
|
dnl will accept "somelabel:", and take it to mean a label with a name that
|
|
dnl happens to end in a colon.
|
|
|
|
AC_DEFUN([GMP_ASM_LABEL_SUFFIX],
|
|
[AC_REQUIRE([GMP_ASM_TEXT])
|
|
AC_CACHE_CHECK([for assembler label suffix],
|
|
gmp_cv_asm_label_suffix,
|
|
[gmp_cv_asm_label_suffix=unknown
|
|
for i in "" ":"; do
|
|
echo "trying $i" >&AC_FD_CC
|
|
GMP_TRY_ASSEMBLE(
|
|
[ $gmp_cv_asm_text
|
|
somelabel$i],
|
|
[gmp_cv_asm_label_suffix=$i
|
|
rm -f conftest*
|
|
break],
|
|
[cat conftest.out >&AC_FD_CC])
|
|
done
|
|
if test "$gmp_cv_asm_label_suffix" = "unknown"; then
|
|
AC_MSG_ERROR([Cannot determine label suffix])
|
|
fi
|
|
])
|
|
echo ["define(<LABEL_SUFFIX>, <$gmp_cv_asm_label_suffix>)"] >> $gmp_tmpconfigm4
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_UNDERSCORE
|
|
dnl ------------------
|
|
dnl Determine whether global symbols need to be prefixed with an underscore.
|
|
dnl The output from "nm" is grepped to see what a typical symbol looks like.
|
|
dnl
|
|
dnl This test used to grep the .o file directly, but that failed with greps
|
|
dnl that don't like binary files (eg. SunOS 4).
|
|
dnl
|
|
dnl This test also used to construct an assembler file with and without an
|
|
dnl underscore and try to link that to a C file, to see which worked.
|
|
dnl Although that's what will happen in the real build we don't really want
|
|
dnl to depend on creating asm files within configure for every possible CPU
|
|
dnl (or at least we don't want to do that more than we have to).
|
|
dnl
|
|
dnl The fallback on no underscore is based on the assumption that the world
|
|
dnl is moving towards non-underscore systems. There should actually be no
|
|
dnl good reason for nm to fail though.
|
|
|
|
AC_DEFUN([GMP_ASM_UNDERSCORE],
|
|
[AC_REQUIRE([GMP_PROG_NM])
|
|
AC_CACHE_CHECK([if globals are prefixed by underscore],
|
|
gmp_cv_asm_underscore,
|
|
[gmp_cv_asm_underscore="unknown"
|
|
cat >conftest.c <<EOF
|
|
int gurkmacka;
|
|
EOF
|
|
gmp_compile="$CC $CFLAGS $CPPFLAGS -c conftest.c >&AC_FD_CC"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
$NM conftest.$OBJEXT >conftest.out
|
|
if grep _gurkmacka conftest.out >/dev/null; then
|
|
gmp_cv_asm_underscore=yes
|
|
elif grep gurkmacka conftest.out >/dev/null; then
|
|
gmp_cv_asm_underscore=no
|
|
else
|
|
echo "configure: $NM doesn't have gurkmacka:" >&AC_FD_CC
|
|
cat conftest.out >&AC_FD_CC
|
|
fi
|
|
else
|
|
echo "configure: failed program was:" >&AC_FD_CC
|
|
cat conftest.c >&AC_FD_CC
|
|
fi
|
|
rm -f conftest*
|
|
])
|
|
case $gmp_cv_asm_underscore in
|
|
yes)
|
|
GMP_DEFINE(GSYM_PREFIX, [_])
|
|
GSYM_FLAG="-D GSYM_PREFIX" ;;
|
|
no)
|
|
GMP_DEFINE(GSYM_PREFIX, [])
|
|
GSYM_FLAG="" ;;
|
|
*)
|
|
AC_MSG_WARN([+----------------------------------------------------------])
|
|
AC_MSG_WARN([| Cannot determine global symbol prefix.])
|
|
AC_MSG_WARN([| $NM output doesn't contain a global data symbol.])
|
|
AC_MSG_WARN([| Will proceed with no underscore.])
|
|
AC_MSG_WARN([| If this is wrong then you'll get link errors referring])
|
|
AC_MSG_WARN([| to ___gmpn_add_n (note three underscores).])
|
|
AC_MSG_WARN([| In this case do a fresh build with an override,])
|
|
AC_MSG_WARN([| ./configure gmp_cv_asm_underscore=yes])
|
|
AC_MSG_WARN([+----------------------------------------------------------])
|
|
GMP_DEFINE(GSYM_PREFIX, [])
|
|
GSYM_FLAG="" ;;
|
|
esac
|
|
AC_SUBST(GSYM_FLAG)
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_ALIGN_LOG
|
|
dnl -----------------
|
|
dnl Is parameter to `.align' logarithmic?
|
|
|
|
AC_DEFUN([GMP_ASM_ALIGN_LOG],
|
|
[AC_REQUIRE([GMP_ASM_GLOBL])
|
|
AC_REQUIRE([GMP_ASM_BYTE])
|
|
AC_REQUIRE([GMP_ASM_DATA])
|
|
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
|
|
AC_REQUIRE([GMP_PROG_NM])
|
|
AC_CACHE_CHECK([if .align assembly directive is logarithmic],
|
|
gmp_cv_asm_align_log,
|
|
[GMP_TRY_ASSEMBLE(
|
|
[ $gmp_cv_asm_data
|
|
.align 4
|
|
$gmp_cv_asm_globl foo
|
|
$gmp_cv_asm_byte 1
|
|
.align 4
|
|
foo$gmp_cv_asm_label_suffix
|
|
$gmp_cv_asm_byte 2],
|
|
[gmp_tmp_val=[`$NM conftest.$OBJEXT | grep foo | \
|
|
sed -e 's;[[][0-9][]]\(.*\);\1;' -e 's;[^1-9]*\([0-9]*\).*;\1;'`]
|
|
if test "$gmp_tmp_val" = "10" || test "$gmp_tmp_val" = "16"; then
|
|
gmp_cv_asm_align_log=yes
|
|
else
|
|
gmp_cv_asm_align_log=no
|
|
fi],
|
|
[AC_MSG_ERROR([cannot assemble alignment test])])])
|
|
|
|
GMP_DEFINE_RAW(["define(<ALIGN_LOGARITHMIC>,<$gmp_cv_asm_align_log>)"])
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_ALIGN_FILL_0x90
|
|
dnl -----------------------
|
|
dnl Determine whether a ",0x90" suffix works on a .align directive.
|
|
dnl This is only meant for use on x86, 0x90 being a "nop".
|
|
dnl
|
|
dnl Old gas, eg. 1.92.3
|
|
dnl Needs ",0x90" or else the fill is 0x00, which can't be executed
|
|
dnl across.
|
|
dnl
|
|
dnl New gas, eg. 2.91
|
|
dnl Generates multi-byte nop fills even when ",0x90" is given.
|
|
dnl
|
|
dnl Solaris 2.6 as
|
|
dnl ",0x90" is not allowed, causes a fatal error.
|
|
dnl
|
|
dnl Solaris 2.8 as
|
|
dnl ",0x90" does nothing, generates a warning that it's being ignored.
|
|
dnl
|
|
dnl SCO OpenServer 5 as
|
|
dnl Second parameter is max bytes to fill, not a fill pattern.
|
|
dnl ",0x90" is an error due to being bigger than the first parameter.
|
|
dnl Multi-byte nop fills are generated in text segments.
|
|
dnl
|
|
dnl Note that both solaris "as"s only care about ",0x90" if they actually
|
|
dnl have to use it to fill something, hence the .byte in the test. It's
|
|
dnl the second .align which provokes the error or warning.
|
|
dnl
|
|
dnl The warning from solaris 2.8 is supressed to stop anyone worrying that
|
|
dnl something might be wrong.
|
|
|
|
AC_DEFUN([GMP_ASM_ALIGN_FILL_0x90],
|
|
[AC_REQUIRE([GMP_ASM_TEXT])
|
|
AC_CACHE_CHECK([if the .align directive accepts an 0x90 fill in .text],
|
|
gmp_cv_asm_align_fill_0x90,
|
|
[GMP_TRY_ASSEMBLE(
|
|
[ $gmp_cv_asm_text
|
|
.align 4, 0x90
|
|
.byte 0
|
|
.align 4, 0x90],
|
|
[if grep "Warning: Fill parameter ignored for executable section" conftest.out >/dev/null; then
|
|
echo "Supressing this warning by omitting 0x90" 1>&AC_FD_CC
|
|
gmp_cv_asm_align_fill_0x90=no
|
|
else
|
|
gmp_cv_asm_align_fill_0x90=yes
|
|
fi],
|
|
[gmp_cv_asm_align_fill_0x90=no])])
|
|
|
|
GMP_DEFINE_RAW(["define(<ALIGN_FILL_0x90>,<$gmp_cv_asm_align_fill_0x90>)"])
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_BYTE
|
|
dnl ------------
|
|
dnl .byte - is usual.
|
|
dnl data1 - required by ia64 (on hpux at least).
|
|
dnl
|
|
dnl This macro is just to support other configure tests, not any actual asm
|
|
dnl code.
|
|
|
|
AC_DEFUN([GMP_ASM_BYTE],
|
|
[AC_REQUIRE([GMP_ASM_TEXT])
|
|
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
|
|
AC_CACHE_CHECK([for assembler byte directive],
|
|
gmp_cv_asm_byte,
|
|
[for i in .byte data1; do
|
|
echo "trying $i" >&AC_FD_CC
|
|
GMP_TRY_ASSEMBLE(
|
|
[ $gmp_cv_asm_data
|
|
$i 0
|
|
],
|
|
[gmp_cv_asm_byte=$i
|
|
rm -f conftest*
|
|
break],
|
|
[cat conftest.out >&AC_FD_CC])
|
|
done
|
|
if test -z "$gmp_cv_asm_byte"; then
|
|
AC_MSG_ERROR([Cannot determine how to emit a data byte])
|
|
fi
|
|
])
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_TEXT
|
|
dnl ------------
|
|
dnl .text - is usual.
|
|
dnl .code - is needed by the hppa on HP-UX (but ia64 HP-UX uses .text)
|
|
dnl .csect .text[PR] - is for AIX.
|
|
|
|
AC_DEFUN([GMP_ASM_TEXT],
|
|
[AC_CACHE_CHECK([how to switch to text section],
|
|
gmp_cv_asm_text,
|
|
[for i in ".text" ".code" [".csect .text[PR]"]; do
|
|
echo "trying $i" >&AC_FD_CC
|
|
GMP_TRY_ASSEMBLE([ $i],
|
|
[gmp_cv_asm_text=$i
|
|
rm -f conftest*
|
|
break])
|
|
done
|
|
if test -z "$gmp_cv_asm_text"; then
|
|
AC_MSG_ERROR([Cannot determine text section directive])
|
|
fi
|
|
])
|
|
echo ["define(<TEXT>, <$gmp_cv_asm_text>)"] >> $gmp_tmpconfigm4
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_DATA
|
|
dnl ------------
|
|
dnl Can we say `.data'?
|
|
|
|
AC_DEFUN([GMP_ASM_DATA],
|
|
[AC_CACHE_CHECK([how to switch to data section],
|
|
gmp_cv_asm_data,
|
|
[case $host in
|
|
*-*-aix*) gmp_cv_asm_data=[".csect .data[RW]"] ;;
|
|
*) gmp_cv_asm_data=".data" ;;
|
|
esac
|
|
])
|
|
echo ["define(<DATA>, <$gmp_cv_asm_data>)"] >> $gmp_tmpconfigm4
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_RODATA
|
|
dnl --------------
|
|
dnl Find out how to switch to the read-only data section.
|
|
dnl
|
|
dnl The compiler output is grepped for the right directive. It's not
|
|
dnl considered wise to just probe for ".section .rodata" or whatever works,
|
|
dnl since arbitrary section names might be accepted, but not necessarily do
|
|
dnl the right thing when they get to the linker.
|
|
dnl
|
|
dnl Only a few asm files use RODATA, so this code is perhaps a bit
|
|
dnl excessive right now, but should find more uses in the future.
|
|
dnl
|
|
dnl FIXME: gcc on aix generates something like ".csect _foo.ro_c[RO],3"
|
|
dnl where foo is the object file. Might need to check for that if we use
|
|
dnl RODATA there.
|
|
|
|
AC_DEFUN([GMP_ASM_RODATA],
|
|
[AC_REQUIRE([GMP_ASM_TEXT])
|
|
AC_REQUIRE([GMP_ASM_DATA])
|
|
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
|
|
AC_REQUIRE([GMP_ASM_UNDERSCORE])
|
|
AC_CACHE_CHECK([how to switch to read-only data section],
|
|
gmp_cv_asm_rodata,
|
|
[
|
|
dnl Default to DATA on CPUs with split code/data caching, and TEXT
|
|
dnl elsewhere. i386 means generic x86, so use DATA on it.
|
|
case $host in
|
|
X86_PATTERN | x86_64-*-*)
|
|
gmp_cv_asm_rodata="$gmp_cv_asm_data" ;;
|
|
*)
|
|
gmp_cv_asm_rodata="$gmp_cv_asm_text" ;;
|
|
esac
|
|
|
|
cat >conftest.c <<EOF
|
|
const int foo = 123;
|
|
EOF
|
|
echo "Test program:" >&AC_FD_CC
|
|
cat conftest.c >&AC_FD_CC
|
|
gmp_compile="$CC $CFLAGS $CPPFLAGS -S conftest.c >&AC_FD_CC"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
echo "Compiler output:" >&AC_FD_CC
|
|
cat conftest.s >&AC_FD_CC
|
|
if test $gmp_cv_asm_underscore = yes; then
|
|
tmp_gsym_prefix=_
|
|
else
|
|
tmp_gsym_prefix=
|
|
fi
|
|
# must see our label
|
|
if grep "^${tmp_gsym_prefix}foo$gmp_cv_asm_label_suffix" conftest.s >/dev/null 2>&AC_FD_CC; then
|
|
# take the last directive before our label (hence skipping segments
|
|
# getting debugging info etc)
|
|
tmp_match=`sed -n ["/^${tmp_gsym_prefix}foo$gmp_cv_asm_label_suffix/q
|
|
/^[. ]*data/p
|
|
/^[. ]*rdata/p
|
|
/^[. ]*text/p
|
|
/^[. ]*section/p
|
|
/^[. ]*csect/p
|
|
/^[. ]*CSECT/p"] conftest.s | sed -n '$p'`
|
|
echo "Match: $tmp_match" >&AC_FD_CC
|
|
if test -n "$tmp_match"; then
|
|
gmp_cv_asm_rodata=$tmp_match
|
|
fi
|
|
else
|
|
echo "Couldn't find label: ^${tmp_gsym_prefix}foo$gmp_cv_asm_label_suffix" >&AC_FD_CC
|
|
fi
|
|
fi
|
|
rm -f conftest*
|
|
])
|
|
echo ["define(<RODATA>, <$gmp_cv_asm_rodata>)"] >> $gmp_tmpconfigm4
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_GLOBL
|
|
dnl -------------
|
|
dnl The assembler directive to mark a label as a global symbol.
|
|
dnl
|
|
dnl ia64 - .global is standard, according to the Intel documentation.
|
|
dnl
|
|
dnl hppa - ".export foo,entry" is demanded by HP hppa "as". ".global" is a
|
|
dnl kind of import.
|
|
dnl
|
|
dnl other - .globl is usual.
|
|
dnl
|
|
dnl "gas" tends to accept .globl everywhere, in addition to .export or
|
|
dnl .global or whatever the system assembler demands.
|
|
|
|
AC_DEFUN([GMP_ASM_GLOBL],
|
|
[AC_REQUIRE([GMP_ASM_TEXT])
|
|
AC_CACHE_CHECK([for assembler global directive],
|
|
gmp_cv_asm_globl,
|
|
[case $host in
|
|
hppa*-*-*) gmp_cv_asm_globl=.export ;;
|
|
IA64_PATTERN) gmp_cv_asm_globl=.global ;;
|
|
*) gmp_cv_asm_globl=.globl ;;
|
|
esac
|
|
])
|
|
echo ["define(<GLOBL>, <$gmp_cv_asm_globl>)"] >> $gmp_tmpconfigm4
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_GLOBL_ATTR
|
|
dnl ------------------
|
|
dnl Do we need something after `GLOBL symbol'?
|
|
|
|
AC_DEFUN([GMP_ASM_GLOBL_ATTR],
|
|
[AC_REQUIRE([GMP_ASM_GLOBL])
|
|
AC_CACHE_CHECK([for assembler global directive attribute],
|
|
gmp_cv_asm_globl_attr,
|
|
[case $gmp_cv_asm_globl in
|
|
.export) gmp_cv_asm_globl_attr=",entry" ;;
|
|
*) gmp_cv_asm_globl_attr="" ;;
|
|
esac
|
|
])
|
|
echo ["define(<GLOBL_ATTR>, <$gmp_cv_asm_globl_attr>)"] >> $gmp_tmpconfigm4
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_TYPE
|
|
dnl ------------
|
|
dnl Can we say ".type", and how?
|
|
dnl
|
|
dnl For i386 GNU/Linux ELF systems, and very likely other ELF systems,
|
|
dnl .type and .size are important on functions in shared libraries. If
|
|
dnl .type is omitted and the mainline program references that function then
|
|
dnl the code will be copied down to the mainline at load time like a piece
|
|
dnl of data. If .size is wrong or missing (it defaults to 4 bytes or some
|
|
dnl such) then incorrect bytes will be copied and a segv is the most likely
|
|
dnl result. In any case such copying is not what's wanted, a .type
|
|
dnl directive will ensure a PLT entry is used.
|
|
dnl
|
|
dnl In GMP the assembler functions are normally only used from within the
|
|
dnl library (since most programs are not interested in the low level
|
|
dnl routines), and in those circumstances a missing .type isn't fatal,
|
|
dnl letting the problem go unnoticed. tests/mpn/t-asmtype.c aims to check
|
|
dnl for it.
|
|
|
|
AC_DEFUN([GMP_ASM_TYPE],
|
|
[AC_CACHE_CHECK([for assembler .type directive],
|
|
gmp_cv_asm_type,
|
|
[gmp_cv_asm_type=
|
|
for gmp_tmp_prefix in @ \# %; do
|
|
GMP_TRY_ASSEMBLE([ .type sym,${gmp_tmp_prefix}function],
|
|
[if grep "\.type pseudo-op used outside of \.def/\.endef ignored" conftest.out >/dev/null; then : ;
|
|
else
|
|
gmp_cv_asm_type=".type \$][1,${gmp_tmp_prefix}\$][2"
|
|
break
|
|
fi])
|
|
done
|
|
rm -f conftest*
|
|
])
|
|
echo ["define(<TYPE>, <$gmp_cv_asm_type>)"] >> $gmp_tmpconfigm4
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_SIZE
|
|
dnl ------------
|
|
dnl Can we say `.size'?
|
|
|
|
AC_DEFUN([GMP_ASM_SIZE],
|
|
[AC_CACHE_CHECK([for assembler .size directive],
|
|
gmp_cv_asm_size,
|
|
[gmp_cv_asm_size=
|
|
GMP_TRY_ASSEMBLE([ .size sym,1],
|
|
[if grep "\.size pseudo-op used outside of \.def/\.endef ignored" conftest.out >/dev/null; then : ;
|
|
else
|
|
gmp_cv_asm_size=".size \$][1,\$][2"
|
|
fi])
|
|
])
|
|
echo ["define(<SIZE>, <$gmp_cv_asm_size>)"] >> $gmp_tmpconfigm4
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_COFF_TYPE
|
|
dnl -----------------
|
|
dnl Determine whether the assembler supports COFF type information.
|
|
dnl
|
|
dnl Currently this is only needed for mingw (and cygwin perhaps) and so is
|
|
dnl run only on the x86s, but it ought to work anywhere.
|
|
dnl
|
|
dnl On MINGW, recent versions of the linker have an automatic import scheme
|
|
dnl for data in a DLL which is referenced by a mainline but without
|
|
dnl __declspec (__dllimport__) on the prototype. It seems functions
|
|
dnl without type information are treated as data, or something, and calls
|
|
dnl to them from the mainline will crash. gcc puts type information on the
|
|
dnl C functions it generates, we need to do the same for assembler
|
|
dnl functions.
|
|
dnl
|
|
dnl This applies only to functions without __declspec(__dllimport__),
|
|
dnl ie. without __GMP_DECLSPEC in the case of libmpir, so it also works just
|
|
dnl to ensure all assembler functions used from outside libmpir have
|
|
dnl __GMP_DECLSPEC on their prototypes. But this isn't an ideal situation,
|
|
dnl since we don't want perfectly valid calls going wrong just because
|
|
dnl there wasn't a prototype in scope.
|
|
dnl
|
|
dnl When an auto-import takes place, the following warning is given by the
|
|
dnl linker. This shouldn't be seen for any functions.
|
|
dnl
|
|
dnl Info: resolving _foo by linking to __imp__foo (auto-import)
|
|
dnl
|
|
dnl
|
|
dnl COFF type directives look like the following
|
|
dnl
|
|
dnl .def _foo
|
|
dnl .scl 2
|
|
dnl .type 32
|
|
dnl .endef
|
|
dnl
|
|
dnl _foo is the symbol with GSYM_PREFIX (_). .scl is the storage class, 2
|
|
dnl for external, 3 for static. .type is the object type, 32 for a
|
|
dnl function.
|
|
dnl
|
|
dnl On an ELF system, this is (correctly) rejected due to .def, .endef and
|
|
dnl .scl being invalid, and .type not having enough arguments.
|
|
|
|
AC_DEFUN([GMP_ASM_COFF_TYPE],
|
|
[AC_REQUIRE([GMP_ASM_TEXT])
|
|
AC_REQUIRE([GMP_ASM_GLOBL])
|
|
AC_REQUIRE([GMP_ASM_GLOBL_ATTR])
|
|
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
|
|
AC_REQUIRE([GMP_ASM_UNDERSCORE])
|
|
AC_CACHE_CHECK([for assembler COFF type directives],
|
|
gmp_cv_asm_x86_coff_type,
|
|
[GMP_TRY_ASSEMBLE(
|
|
[ $gmp_cv_asm_text
|
|
$gmp_cv_asm_globl ${tmp_gsym_prefix}foo$gmp_cv_asm_globl_attr
|
|
.def ${tmp_gsym_prefix}foo
|
|
.scl 2
|
|
.type 32
|
|
.endef
|
|
${tmp_gsym_prefix}foo$gmp_cv_asm_label_suffix
|
|
],
|
|
[gmp_cv_asm_x86_coff_type=yes],
|
|
[gmp_cv_asm_x86_coff_type=no])
|
|
])
|
|
echo ["define(<HAVE_COFF_TYPE>, <$gmp_cv_asm_x86_coff_type>)"] >> $gmp_tmpconfigm4
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_LSYM_PREFIX
|
|
dnl -------------------
|
|
dnl What is the prefix for a local label?
|
|
dnl
|
|
dnl The prefixes tested are,
|
|
dnl
|
|
dnl L - usual for underscore systems
|
|
dnl .L - usual for non-underscore systems
|
|
dnl $ - alpha (gas and OSF system assembler)
|
|
dnl L$ - hppa (gas and HP-UX system assembler)
|
|
dnl
|
|
dnl The default is "L" if the tests fail for any reason. There's a good
|
|
dnl chance this will be adequate, since on most systems labels are local
|
|
dnl anyway unless given a ".globl", and an "L" will avoid clashes with
|
|
dnl other identifers.
|
|
dnl
|
|
dnl For gas, ".L" is normally purely local to the assembler, it doesn't get
|
|
dnl put into the object file at all. This style is preferred, to keep the
|
|
dnl object files nice and clean.
|
|
dnl
|
|
dnl BSD format nm produces a line like
|
|
dnl
|
|
dnl 00000000 t Lgurkmacka
|
|
dnl
|
|
dnl The symbol code is normally "t" for text, but any lower case letter
|
|
dnl indicates a local definition.
|
|
dnl
|
|
dnl Code "n" is for a debugging symbol, OSF "nm -B" gives that as an upper
|
|
dnl case "N" for a local.
|
|
dnl
|
|
dnl HP-UX nm prints an error message (though seems to give a 0 exit) if
|
|
dnl there's no symbols at all in an object file, hence the use of "dummy".
|
|
|
|
AC_DEFUN([GMP_ASM_LSYM_PREFIX],
|
|
[AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
|
|
AC_REQUIRE([GMP_ASM_TEXT])
|
|
AC_REQUIRE([GMP_PROG_NM])
|
|
AC_CACHE_CHECK([for assembler local label prefix],
|
|
gmp_cv_asm_lsym_prefix,
|
|
[gmp_tmp_pre_appears=yes
|
|
for gmp_tmp_pre in L .L $ L$; do
|
|
echo "Trying $gmp_tmp_pre" >&AC_FD_CC
|
|
GMP_TRY_ASSEMBLE(
|
|
[ $gmp_cv_asm_text
|
|
dummy${gmp_cv_asm_label_suffix}
|
|
${gmp_tmp_pre}gurkmacka${gmp_cv_asm_label_suffix}],
|
|
[if $NM conftest.$OBJEXT >conftest.nm 2>&AC_FD_CC; then : ; else
|
|
cat conftest.nm >&AC_FD_CC
|
|
AC_MSG_WARN(["$NM" failure])
|
|
break
|
|
fi
|
|
cat conftest.nm >&AC_FD_CC
|
|
if grep gurkmacka conftest.nm >/dev/null; then : ; else
|
|
# no mention of the symbol, this is good
|
|
echo "$gmp_tmp_pre label doesn't appear in object file at all (good)" >&AC_FD_CC
|
|
gmp_cv_asm_lsym_prefix="$gmp_tmp_pre"
|
|
gmp_tmp_pre_appears=no
|
|
break
|
|
fi
|
|
if grep [' [a-zN] .*gurkmacka'] conftest.nm >/dev/null; then
|
|
# symbol mentioned as a local, use this if nothing better
|
|
echo "$gmp_tmp_pre label is local but still in object file" >&AC_FD_CC
|
|
if test -z "$gmp_cv_asm_lsym_prefix"; then
|
|
gmp_cv_asm_lsym_prefix="$gmp_tmp_pre"
|
|
fi
|
|
else
|
|
echo "$gmp_tmp_pre label is something unknown" >&AC_FD_CC
|
|
fi
|
|
])
|
|
done
|
|
rm -f conftest*
|
|
if test -z "$gmp_cv_asm_lsym_prefix"; then
|
|
gmp_cv_asm_lsym_prefix=L
|
|
AC_MSG_WARN([cannot determine local label, using default $gmp_cv_asm_lsym_prefix])
|
|
fi
|
|
# for development purposes, note whether we got a purely temporary local label
|
|
echo "Local label appears in object files: $gmp_tmp_pre_appears" >&AC_FD_CC
|
|
])
|
|
echo ["define(<LSYM_PREFIX>, <${gmp_cv_asm_lsym_prefix}>)"] >> $gmp_tmpconfigm4
|
|
AC_DEFINE_UNQUOTED(LSYM_PREFIX, "$gmp_cv_asm_lsym_prefix",
|
|
[Assembler local label prefix])
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_W32
|
|
dnl -----------
|
|
dnl How to define a 32-bit word.
|
|
dnl
|
|
dnl FIXME: This test is not right for ia64-*-hpux*. The directive should
|
|
dnl be "data4", but the W32 macro is not currently used by the mpn/ia64 asm
|
|
dnl files.
|
|
|
|
AC_DEFUN([GMP_ASM_W32],
|
|
[AC_REQUIRE([GMP_ASM_DATA])
|
|
AC_REQUIRE([GMP_ASM_BYTE])
|
|
AC_REQUIRE([GMP_ASM_GLOBL])
|
|
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
|
|
AC_REQUIRE([GMP_PROG_NM])
|
|
AC_CACHE_CHECK([how to define a 32-bit word],
|
|
gmp_cv_asm_w32,
|
|
[case $host in
|
|
*-*-hpux*)
|
|
# FIXME: HPUX puts first symbol at 0x40000000, breaking our assumption
|
|
# that it's at 0x0. We'll have to declare another symbol before the
|
|
# .long/.word and look at the distance between the two symbols. The
|
|
# only problem is that the sed expression(s) barfs (on Solaris, for
|
|
# example) for the symbol with value 0. For now, HPUX uses .word.
|
|
gmp_cv_asm_w32=".word"
|
|
;;
|
|
*-*-*)
|
|
gmp_tmp_val=
|
|
for gmp_tmp_op in .long .word data4; do
|
|
GMP_TRY_ASSEMBLE(
|
|
[ $gmp_cv_asm_data
|
|
$gmp_cv_asm_globl foo
|
|
$gmp_tmp_op 0
|
|
foo$gmp_cv_asm_label_suffix
|
|
$gmp_cv_asm_byte 0],
|
|
[gmp_tmp_val=[`$NM conftest.$OBJEXT | grep foo | \
|
|
sed -e 's;[[][0-9][]]\(.*\);\1;' -e 's;[^1-9]*\([0-9]*\).*;\1;'`]
|
|
if test "$gmp_tmp_val" = 4; then
|
|
gmp_cv_asm_w32="$gmp_tmp_op"
|
|
break
|
|
fi])
|
|
done
|
|
rm -f conftest*
|
|
;;
|
|
esac
|
|
if test -z "$gmp_cv_asm_w32"; then
|
|
AC_MSG_ERROR([cannot determine how to define a 32-bit word])
|
|
fi
|
|
])
|
|
echo ["define(<W32>, <$gmp_cv_asm_w32>)"] >> $gmp_tmpconfigm4
|
|
])
|
|
|
|
|
|
dnl GMP_X86_ASM_GOT_UNDERSCORE
|
|
dnl --------------------------
|
|
dnl Determine whether i386 _GLOBAL_OFFSET_TABLE_ needs an additional
|
|
dnl underscore prefix.
|
|
dnl
|
|
dnl SVR4 - the standard is _GLOBAL_OFFSET_TABLE_
|
|
dnl GNU/Linux - follows SVR4
|
|
dnl OpenBSD - an a.out underscore system, uses __GLOBAL_OFFSET_TABLE_
|
|
dnl NetBSD - also an a.out underscore system, but _GLOBAL_OFFSET_TABLE_
|
|
dnl
|
|
dnl The test attempts to link a program using _GLOBAL_OFFSET_TABLE_ or
|
|
dnl __GLOBAL_OFFSET_TABLE_ to see which works.
|
|
dnl
|
|
dnl $lt_prog_compiler_pic is included in the compile because old versions
|
|
dnl of gas wouldn't accept PIC idioms without the right option (-K). This
|
|
dnl is the same as what libtool and mpn/Makeasm.am will do.
|
|
dnl
|
|
dnl $lt_prog_compiler_pic is also included in the link because OpenBSD ld
|
|
dnl won't accept an R_386_GOTPC relocation without the right options. This
|
|
dnl is not what's done by the Makefiles when building executables, but
|
|
dnl let's hope it's ok (it works fine with gcc).
|
|
dnl
|
|
dnl The fallback is no additional underscore, on the basis that this will
|
|
dnl suit SVR4/ELF style systems, which should be much more common than
|
|
dnl a.out systems with shared libraries.
|
|
dnl
|
|
dnl Note that it's not an error for the tests to fail, since for instance
|
|
dnl cygwin, mingw and djgpp don't have a _GLOBAL_OFFSET_TABLE_ scheme at
|
|
dnl all.
|
|
dnl
|
|
dnl Perhaps $CCAS could be asked to do the linking as well as the
|
|
dnl assembling, but in the Makefiles it's only used for assembling, so lets
|
|
dnl keep it that way.
|
|
dnl
|
|
dnl The test here is run even under --disable-shared, so that PIC objects
|
|
dnl can be built and tested by the tune/many.pl development scheme. The
|
|
dnl tests will be reasonably quick and won't give a fatal error, so this
|
|
dnl arrangement is ok. AC_LIBTOOL_PROG_COMPILER_PIC does its
|
|
dnl $lt_prog_compiler_pic setups even for --disable-shared too.
|
|
|
|
AC_DEFUN([GMP_ASM_X86_GOT_UNDERSCORE],
|
|
[AC_REQUIRE([GMP_ASM_TEXT])
|
|
AC_REQUIRE([GMP_ASM_GLOBL])
|
|
AC_REQUIRE([GMP_ASM_GLOBL_ATTR])
|
|
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
|
|
AC_REQUIRE([GMP_ASM_UNDERSCORE])
|
|
AC_REQUIRE([AC_LIBTOOL_PROG_COMPILER_PIC])
|
|
AC_CACHE_CHECK([if _GLOBAL_OFFSET_TABLE_ is prefixed by underscore],
|
|
gmp_cv_asm_x86_got_underscore,
|
|
[gmp_cv_asm_x86_got_underscore="not applicable"
|
|
if test $gmp_cv_asm_underscore = yes; then
|
|
tmp_gsym_prefix=_
|
|
else
|
|
tmp_gsym_prefix=
|
|
fi
|
|
for tmp_underscore in "" "_"; do
|
|
cat >conftest.s <<EOF
|
|
$gmp_cv_asm_text
|
|
$gmp_cv_asm_globl ${tmp_gsym_prefix}main$gmp_cv_asm_globl_attr
|
|
${tmp_gsym_prefix}main$gmp_cv_asm_label_suffix
|
|
addl $ ${tmp_underscore}_GLOBAL_OFFSET_TABLE_, %ebx
|
|
EOF
|
|
gmp_compile="$CCAS $CFLAGS $CPPFLAGS $lt_prog_compiler_pic conftest.s >&AC_FD_CC && $CC $CFLAGS $CPPFLAGS $lt_prog_compiler_pic conftest.$OBJEXT >&AC_FD_CC"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
if test "$tmp_underscore" = "_"; then
|
|
gmp_cv_asm_x86_got_underscore=yes
|
|
else
|
|
gmp_cv_asm_x86_got_underscore=no
|
|
fi
|
|
break
|
|
fi
|
|
done
|
|
rm -f conftest* a.out b.out a.exe a_out.exe
|
|
])
|
|
if test "$gmp_cv_asm_x86_got_underscore" = "yes"; then
|
|
GMP_DEFINE(GOT_GSYM_PREFIX, [_])
|
|
else
|
|
GMP_DEFINE(GOT_GSYM_PREFIX, [])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_X86_GOT_EAX_OK(CC+CFLAGS, [ACTION-YES] [, ACTION-NO])
|
|
dnl -------------------------------------------------------------
|
|
dnl Determine whether _GLOBAL_OFFSET_TABLE_ used with %eax is ok.
|
|
dnl
|
|
dnl An instruction
|
|
dnl
|
|
dnl addl $_GLOBAL_OFFSET_TABLE_, %eax
|
|
dnl
|
|
dnl is incorrectly assembled by gas 2.12 (or thereabouts) and earlier. It
|
|
dnl puts an addend 2 into the R_386_GOTPC relocation, but it should be 1
|
|
dnl for this %eax form being a 1 byte opcode (with other registers it's 2
|
|
dnl opcode bytes). See note about this in mpn/x86/README too.
|
|
dnl
|
|
dnl We assemble this, surrounded by some unlikely byte sequences as
|
|
dnl delimiters, and check for the bad output.
|
|
dnl
|
|
dnl This is for use by compiler probing in GMP_PROG_CC_WORKS, so the result
|
|
dnl is not cached.
|
|
dnl
|
|
dnl This test is not specific to gas, but old gas is the only assembler we
|
|
dnl know of with this problem. The Solaris has been seen coming out ok.
|
|
dnl
|
|
dnl ".text" is hard coded because this macro is wanted before GMP_ASM_TEXT.
|
|
dnl This should be fine, ".text" is normal on x86 systems, and certainly
|
|
dnl will be fine with the offending gas.
|
|
dnl
|
|
dnl If an error occurs when assembling, we consider the assembler ok, since
|
|
dnl the bad output does not occur. This happens for instance on mingw,
|
|
dnl where _GLOBAL_OFFSET_TABLE_ results in a bfd error, since there's no
|
|
dnl GOT etc in PE object files.
|
|
dnl
|
|
dnl This test is used before the object file extension has been determined,
|
|
dnl so we force output to conftest.o. Using -o with -c is not portable,
|
|
dnl but we think all x86 compilers will accept -o with -c, certainly gcc
|
|
dnl does.
|
|
dnl
|
|
dnl -fPIC is hard coded here, because this test is for use before libtool
|
|
dnl has established the pic options. It's right for gcc, but perhaps not
|
|
dnl other compilers.
|
|
|
|
AC_DEFUN([GMP_ASM_X86_GOT_EAX_OK],
|
|
[echo "Testing gas GOT with eax good" >&AC_FD_CC
|
|
cat >conftest.awk <<\EOF
|
|
[BEGIN {
|
|
want[0] = "001"
|
|
want[1] = "043"
|
|
want[2] = "105"
|
|
want[3] = "147"
|
|
want[4] = "211"
|
|
want[5] = "253"
|
|
want[6] = "315"
|
|
want[7] = "357"
|
|
|
|
want[8] = "005"
|
|
want[9] = "002"
|
|
want[10] = "000"
|
|
want[11] = "000"
|
|
want[12] = "000"
|
|
|
|
want[13] = "376"
|
|
want[14] = "334"
|
|
want[15] = "272"
|
|
want[16] = "230"
|
|
want[17] = "166"
|
|
want[18] = "124"
|
|
want[19] = "062"
|
|
want[20] = "020"
|
|
|
|
result = "yes"
|
|
}
|
|
{
|
|
for (f = 2; f <= NF; f++)
|
|
{
|
|
for (i = 0; i < 20; i++)
|
|
got[i] = got[i+1];
|
|
got[20] = $f;
|
|
|
|
found = 1
|
|
for (i = 0; i < 21; i++)
|
|
if (got[i] != want[i])
|
|
{
|
|
found = 0
|
|
break
|
|
}
|
|
if (found)
|
|
{
|
|
result = "no"
|
|
exit
|
|
}
|
|
}
|
|
}
|
|
END {
|
|
print result
|
|
}
|
|
]EOF
|
|
cat >conftest.s <<\EOF
|
|
[ .text
|
|
.byte 1, 35, 69, 103, 137, 171, 205, 239
|
|
addl $_GLOBAL_OFFSET_TABLE_, %eax
|
|
.byte 254, 220, 186, 152, 118, 84, 50, 16
|
|
]EOF
|
|
tmp_got_good=yes
|
|
gmp_compile="$1 -fPIC -o conftest.o -c conftest.s >&AC_FD_CC 2>&1"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
tmp_got_good=`od -b conftest.o | $AWK -f conftest.awk`
|
|
fi
|
|
rm -f conftest.*
|
|
echo "Result: $tmp_got_good" >&AC_FD_CC
|
|
if test "$tmp_got_good" = no; then
|
|
ifelse([$3],,:,[$3])
|
|
else
|
|
ifelse([$2],,:,[$2])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_X86_MMX([ACTION-IF-YES][,ACTION-IF-NO])
|
|
dnl -----------------------------------------------
|
|
dnl Determine whether the assembler supports MMX instructions.
|
|
dnl
|
|
dnl This macro is wanted before GMP_ASM_TEXT, so ".text" is hard coded
|
|
dnl here. ".text" is believed to be correct on all x86 systems. Actually
|
|
dnl ".text" probably isn't needed at all, at least for just checking
|
|
dnl instruction syntax.
|
|
dnl
|
|
dnl "movq %mm0, %mm1" should assemble to "0f 6f c8", but Solaris 2.6 and
|
|
dnl 2.7 wrongly assemble it to "0f 6f c1" (that being the reverse "movq
|
|
dnl %mm1, %mm0"). It seems more trouble than it's worth to work around
|
|
dnl this in the code, so just detect and reject.
|
|
|
|
AC_DEFUN([GMP_ASM_X86_MMX],
|
|
[AC_CACHE_CHECK([if the assembler knows about MMX instructions],
|
|
gmp_cv_asm_x86_mmx,
|
|
[GMP_TRY_ASSEMBLE(
|
|
[ .text
|
|
movq %mm0, %mm1],
|
|
[gmp_cv_asm_x86_mmx=yes
|
|
case $host in
|
|
*-*-solaris*)
|
|
if (dis conftest.$OBJEXT >conftest.out) 2>/dev/null; then
|
|
if grep "0f 6f c1" conftest.out >/dev/null; then
|
|
gmp_cv_asm_x86_mmx=movq-bug
|
|
fi
|
|
else
|
|
AC_MSG_WARN(["dis" not available to check for "as" movq bug])
|
|
fi
|
|
esac],
|
|
[gmp_cv_asm_x86_mmx=no])])
|
|
|
|
case $gmp_cv_asm_x86_mmx in
|
|
movq-bug)
|
|
AC_MSG_WARN([+----------------------------------------------------------])
|
|
AC_MSG_WARN([| WARNING WARNING WARNING])
|
|
AC_MSG_WARN([| Host CPU has MMX code, but the assembler])
|
|
AC_MSG_WARN([| $CCAS $CFLAGS $CPPFLAGS])
|
|
AC_MSG_WARN([| has the Solaris 2.6 and 2.7 bug where register to register])
|
|
AC_MSG_WARN([| movq operands are reversed.])
|
|
AC_MSG_WARN([| Non-MMX replacements will be used.])
|
|
AC_MSG_WARN([| This will be an inferior build.])
|
|
AC_MSG_WARN([+----------------------------------------------------------])
|
|
;;
|
|
no)
|
|
AC_MSG_WARN([+----------------------------------------------------------])
|
|
AC_MSG_WARN([| WARNING WARNING WARNING])
|
|
AC_MSG_WARN([| Host CPU has MMX code, but it can't be assembled by])
|
|
AC_MSG_WARN([| $CCAS $CFLAGS $CPPFLAGS])
|
|
AC_MSG_WARN([| Non-MMX replacements will be used.])
|
|
AC_MSG_WARN([| This will be an inferior build.])
|
|
AC_MSG_WARN([+----------------------------------------------------------])
|
|
;;
|
|
esac
|
|
if test "$gmp_cv_asm_x86_mmx" = yes; then
|
|
ifelse([$1],,:,[$1])
|
|
else
|
|
ifelse([$2],,:,[$2])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_X86_SHLDL_CL
|
|
dnl --------------------
|
|
|
|
AC_DEFUN([GMP_ASM_X86_SHLDL_CL],
|
|
[AC_REQUIRE([GMP_ASM_TEXT])
|
|
AC_CACHE_CHECK([if the assembler takes cl with shldl],
|
|
gmp_cv_asm_x86_shldl_cl,
|
|
[GMP_TRY_ASSEMBLE(
|
|
[ $gmp_cv_asm_text
|
|
shldl %cl, %eax, %ebx],
|
|
gmp_cv_asm_x86_shldl_cl=yes,
|
|
gmp_cv_asm_x86_shldl_cl=no)
|
|
])
|
|
if test "$gmp_cv_asm_x86_shldl_cl" = "yes"; then
|
|
GMP_DEFINE(WANT_SHLDL_CL,1)
|
|
else
|
|
GMP_DEFINE(WANT_SHLDL_CL,0)
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_X86_SSE2([ACTION-IF-YES][,ACTION-IF-NO])
|
|
dnl ------------------------------------------------
|
|
dnl Determine whether the assembler supports SSE2 instructions.
|
|
dnl
|
|
dnl This macro is wanted before GMP_ASM_TEXT, so ".text" is hard coded
|
|
dnl here. ".text" is believed to be correct on all x86 systems, certainly
|
|
dnl it's all GMP_ASM_TEXT gives currently. Actually ".text" probably isn't
|
|
dnl needed at all, at least for just checking instruction syntax.
|
|
|
|
AC_DEFUN([GMP_ASM_X86_SSE2],
|
|
[AC_CACHE_CHECK([if the assembler knows about SSE2 instructions],
|
|
gmp_cv_asm_x86_sse2,
|
|
[GMP_TRY_ASSEMBLE(
|
|
[ .text
|
|
paddq %mm0, %mm1],
|
|
[gmp_cv_asm_x86_sse2=yes],
|
|
[gmp_cv_asm_x86_sse2=no])
|
|
])
|
|
case $gmp_cv_asm_x86_sse2 in
|
|
yes)
|
|
ifelse([$1],,:,[$1])
|
|
;;
|
|
*)
|
|
AC_MSG_WARN([+----------------------------------------------------------])
|
|
AC_MSG_WARN([| WARNING WARNING WARNING])
|
|
AC_MSG_WARN([| Host CPU has SSE2 code, but it can't be assembled by])
|
|
AC_MSG_WARN([| $CCAS $CFLAGS $CPPFLAGS])
|
|
AC_MSG_WARN([| Non-SSE2 replacements will be used.])
|
|
AC_MSG_WARN([| This will be an inferior build.])
|
|
AC_MSG_WARN([+----------------------------------------------------------])
|
|
ifelse([$2],,:,[$2])
|
|
;;
|
|
esac
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_X86_MCOUNT
|
|
dnl ------------------
|
|
dnl Find out how to call mcount for profiling on an x86 system.
|
|
dnl
|
|
dnl A dummy function is compiled and the ".s" output examined. The pattern
|
|
dnl matching might be a bit fragile, but should work at least with gcc on
|
|
dnl sensible systems. Certainly it's better than hard coding a table of
|
|
dnl conventions.
|
|
dnl
|
|
dnl For non-PIC, any ".data" is taken to mean a counter might be passed.
|
|
dnl It's assumed a movl will set it up, and the right register is taken
|
|
dnl from that movl. Any movl involving %esp is ignored (a frame pointer
|
|
dnl setup normally).
|
|
dnl
|
|
dnl For PIC, any ".data" is similarly interpreted, but a GOTOFF identifies
|
|
dnl the line setting up the right register.
|
|
dnl
|
|
dnl In both cases a line with "mcount" identifies the call and that line is
|
|
dnl used literally.
|
|
dnl
|
|
dnl On some systems (eg. FreeBSD 3.5) gcc emits ".data" but doesn't use it,
|
|
dnl so it's not an error to have .data but then not find a register.
|
|
dnl
|
|
dnl Variations in mcount conventions on different x86 systems can be found
|
|
dnl in gcc config/i386. mcount can have a "_" prefix or be .mcount or
|
|
dnl _mcount_ptr, and for PIC it can be called through a GOT entry, or via
|
|
dnl the PLT. If a pointer to a counter is required it's passed in %eax or
|
|
dnl %edx.
|
|
dnl
|
|
dnl Flags to specify PIC are taken from $lt_prog_compiler_pic set by
|
|
dnl AC_PROG_LIBTOOL.
|
|
dnl
|
|
dnl Enhancement: Cache the values determined here. But what's the right way
|
|
dnl to get two variables (mcount_nonpic_reg and mcount_nonpic_call say) set
|
|
dnl from one block of commands?
|
|
|
|
AC_DEFUN([GMP_ASM_X86_MCOUNT],
|
|
[AC_REQUIRE([AC_ENABLE_SHARED])
|
|
AC_REQUIRE([AC_PROG_LIBTOOL])
|
|
AC_MSG_CHECKING([how to call x86 mcount])
|
|
cat >conftest.c <<EOF
|
|
foo(){bar();}
|
|
EOF
|
|
|
|
if test "$enable_static" = yes; then
|
|
gmp_asmout_compile="$CC $CFLAGS $CPPFLAGS -S conftest.c 1>&AC_FD_CC"
|
|
if AC_TRY_EVAL(gmp_asmout_compile); then
|
|
if grep '\.data' conftest.s >/dev/null; then
|
|
mcount_nonpic_reg=`sed -n ['/esp/!s/.*movl.*,\(%[a-z]*\).*$/\1/p'] conftest.s`
|
|
else
|
|
mcount_nonpic_reg=
|
|
fi
|
|
mcount_nonpic_call=`grep 'call.*mcount' conftest.s`
|
|
if test -z "$mcount_nonpic_call"; then
|
|
AC_MSG_ERROR([Cannot find mcount call for non-PIC])
|
|
fi
|
|
else
|
|
AC_MSG_ERROR([Cannot compile test program for non-PIC])
|
|
fi
|
|
fi
|
|
|
|
if test "$enable_shared" = yes; then
|
|
gmp_asmout_compile="$CC $CFLAGS $CPPFLAGS $lt_prog_compiler_pic -S conftest.c 1>&AC_FD_CC"
|
|
if AC_TRY_EVAL(gmp_asmout_compile); then
|
|
if grep '\.data' conftest.s >/dev/null; then
|
|
case $lt_prog_compiler_pic in
|
|
*-DDLL_EXPORT*)
|
|
# Windows DLLs have non-PIC style mcount
|
|
mcount_pic_reg=`sed -n ['/esp/!s/.*movl.*,\(%[a-z]*\).*$/\1/p'] conftest.s`
|
|
;;
|
|
*)
|
|
mcount_pic_reg=`sed -n ['s/.*GOTOFF.*,\(%[a-z]*\).*$/\1/p'] conftest.s`
|
|
;;
|
|
esac
|
|
else
|
|
mcount_pic_reg=
|
|
fi
|
|
mcount_pic_call=`grep 'call.*mcount' conftest.s`
|
|
if test -z "$mcount_pic_call"; then
|
|
AC_MSG_ERROR([Cannot find mcount call for PIC])
|
|
fi
|
|
else
|
|
AC_MSG_ERROR([Cannot compile test program for PIC])
|
|
fi
|
|
fi
|
|
|
|
GMP_DEFINE_RAW(["define(<MCOUNT_NONPIC_REG>, <\`$mcount_nonpic_reg'>)"])
|
|
GMP_DEFINE_RAW(["define(<MCOUNT_NONPIC_CALL>,<\`$mcount_nonpic_call'>)"])
|
|
GMP_DEFINE_RAW(["define(<MCOUNT_PIC_REG>, <\`$mcount_pic_reg'>)"])
|
|
GMP_DEFINE_RAW(["define(<MCOUNT_PIC_CALL>, <\`$mcount_pic_call'>)"])
|
|
|
|
rm -f conftest.*
|
|
AC_MSG_RESULT([determined])
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_IA64_ALIGN_OK
|
|
dnl ---------------------
|
|
dnl Determine whether .align correctly pads with nop instructions in a text
|
|
dnl segment.
|
|
dnl
|
|
dnl gas 2.14 and earlier byte swaps its padding bundle on big endian
|
|
dnl systems, which is incorrect (endianness only changes data). What
|
|
dnl should be "nop.m / nop.f / nop.i" comes out as "break" instructions.
|
|
dnl
|
|
dnl The test here detects the bad case, and assumes anything else is ok
|
|
dnl (there are many sensible nop bundles, so it'd be impractical to try to
|
|
dnl match everything good).
|
|
|
|
AC_DEFUN([GMP_ASM_IA64_ALIGN_OK],
|
|
[AC_CACHE_CHECK([whether assembler .align padding is good],
|
|
gmp_cv_asm_ia64_align_ok,
|
|
[cat >conftest.awk <<\EOF
|
|
[BEGIN {
|
|
want[0] = "011"
|
|
want[1] = "160"
|
|
want[2] = "074"
|
|
want[3] = "040"
|
|
want[4] = "000"
|
|
want[5] = "040"
|
|
want[6] = "020"
|
|
want[7] = "221"
|
|
want[8] = "114"
|
|
want[9] = "000"
|
|
want[10] = "100"
|
|
want[11] = "200"
|
|
want[12] = "122"
|
|
want[13] = "261"
|
|
want[14] = "000"
|
|
want[15] = "200"
|
|
|
|
want[16] = "000"
|
|
want[17] = "004"
|
|
want[18] = "000"
|
|
want[19] = "000"
|
|
want[20] = "000"
|
|
want[21] = "000"
|
|
want[22] = "002"
|
|
want[23] = "000"
|
|
want[24] = "000"
|
|
want[25] = "000"
|
|
want[26] = "000"
|
|
want[27] = "001"
|
|
want[28] = "000"
|
|
want[29] = "000"
|
|
want[30] = "000"
|
|
want[31] = "014"
|
|
|
|
want[32] = "011"
|
|
want[33] = "270"
|
|
want[34] = "140"
|
|
want[35] = "062"
|
|
want[36] = "000"
|
|
want[37] = "040"
|
|
want[38] = "240"
|
|
want[39] = "331"
|
|
want[40] = "160"
|
|
want[41] = "000"
|
|
want[42] = "100"
|
|
want[43] = "240"
|
|
want[44] = "343"
|
|
want[45] = "371"
|
|
want[46] = "000"
|
|
want[47] = "200"
|
|
|
|
result = "yes"
|
|
}
|
|
{
|
|
for (f = 2; f <= NF; f++)
|
|
{
|
|
for (i = 0; i < 47; i++)
|
|
got[i] = got[i+1];
|
|
got[47] = $f;
|
|
|
|
found = 1
|
|
for (i = 0; i < 48; i++)
|
|
if (got[i] != want[i])
|
|
{
|
|
found = 0
|
|
break
|
|
}
|
|
if (found)
|
|
{
|
|
result = "no"
|
|
exit
|
|
}
|
|
}
|
|
}
|
|
END {
|
|
print result
|
|
}
|
|
]EOF
|
|
GMP_TRY_ASSEMBLE(
|
|
[ .text
|
|
.align 32
|
|
{ .mmi; add r14 = r15, r16
|
|
add r17 = r18, r19
|
|
add r20 = r21, r22 ;; }
|
|
.align 32
|
|
{ .mmi; add r23 = r24, r25
|
|
add r26 = r27, r28
|
|
add r29 = r30, r31 ;; }
|
|
],
|
|
[gmp_cv_asm_ia64_align_ok=`od -b conftest.$OBJEXT | $AWK -f conftest.awk`],
|
|
[AC_MSG_WARN([oops, cannot compile test program])
|
|
gmp_cv_asm_ia64_align_ok=yes])
|
|
])
|
|
GMP_DEFINE_RAW(["define(<IA64_ALIGN_OK>, <\`$gmp_cv_asm_ia64_align_ok'>)"])
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_POWERPC_PIC_ALWAYS
|
|
dnl --------------------------
|
|
dnl Determine whether PIC is the default compiler output.
|
|
dnl
|
|
dnl SVR4 style "foo@ha" addressing is interpreted as non-PIC, and anything
|
|
dnl else is assumed to require PIC always (Darwin or AIX). SVR4 is the
|
|
dnl only non-PIC addressing syntax the asm files have at the moment anyway.
|
|
dnl
|
|
dnl Libtool does this by taking "*-*-aix* | *-*-darwin* | *-*-rhapsody*" to
|
|
dnl mean PIC always, but it seems more reliable to grep the compiler
|
|
dnl output.
|
|
dnl
|
|
dnl The next paragraph is untrue for Tiger. Was it ever true? For tiger,
|
|
dnl "cc -fast" makes non-PIC the default (and the binaries do run).
|
|
dnl On Darwin "cc -static" is non-PIC with syntax "ha16(_foo)", but that's
|
|
dnl apparently only for use in the kernel, which we're not attempting to
|
|
dnl target at the moment, so don't look for that.
|
|
|
|
AC_DEFUN([GMP_ASM_POWERPC_PIC_ALWAYS],
|
|
[AC_REQUIRE([AC_PROG_CC])
|
|
AC_CACHE_CHECK([whether compiler output is PIC by default],
|
|
gmp_cv_asm_powerpc_pic,
|
|
[gmp_cv_asm_powerpc_pic=yes
|
|
cat >conftest.c <<EOF
|
|
int foo;
|
|
int *bar() { return &foo; }
|
|
EOF
|
|
echo "Test program:" >&AC_FD_CC
|
|
cat conftest.c >&AC_FD_CC
|
|
gmp_compile="$CC $CFLAGS $CPPFLAGS -S conftest.c >&AC_FD_CC"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
echo "Compiler output:" >&AC_FD_CC
|
|
cat conftest.s >&AC_FD_CC
|
|
if grep 'foo@ha' conftest.s >/dev/null 2>&AC_FD_CC; then
|
|
gmp_cv_asm_powerpc_pic=no
|
|
fi
|
|
if grep 'ha16(_foo)' conftest.s >/dev/null 2>&AC_FD_CC; then
|
|
gmp_cv_asm_powerpc_pic=no
|
|
fi
|
|
fi
|
|
rm -f conftest*
|
|
])
|
|
GMP_DEFINE_RAW(["define(<PIC_ALWAYS>,<$gmp_cv_asm_powerpc_pic>)"])
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_POWERPC_R_REGISTERS
|
|
dnl ---------------------------
|
|
dnl Determine whether the assembler takes powerpc registers with an "r" as
|
|
dnl in "r6", or as plain "6". The latter is standard, but NeXT, Rhapsody,
|
|
dnl and MacOS-X require the "r" forms.
|
|
dnl
|
|
dnl See also mpn/powerpc32/powerpc-defs.m4 which uses the result of this
|
|
dnl test.
|
|
|
|
AC_DEFUN([GMP_ASM_POWERPC_R_REGISTERS],
|
|
[AC_REQUIRE([GMP_ASM_TEXT])
|
|
AC_CACHE_CHECK([if the assembler needs r on registers],
|
|
gmp_cv_asm_powerpc_r_registers,
|
|
[GMP_TRY_ASSEMBLE(
|
|
[ $gmp_cv_asm_text
|
|
mtctr 6],
|
|
[gmp_cv_asm_powerpc_r_registers=no],
|
|
[GMP_TRY_ASSEMBLE(
|
|
[ $gmp_cv_asm_text
|
|
mtctr r6],
|
|
[gmp_cv_asm_powerpc_r_registers=yes],
|
|
[AC_MSG_ERROR([neither "mtctr 6" nor "mtctr r6" works])])])])
|
|
|
|
GMP_DEFINE_RAW(["define(<WANT_R_REGISTERS>,<$gmp_cv_asm_powerpc_r_registers>)"])
|
|
])
|
|
|
|
|
|
dnl GMP_ASM_SPARC_REGISTER
|
|
dnl ----------------------
|
|
dnl Determine whether the assembler accepts the ".register" directive.
|
|
dnl Old versions of solaris "as" don't.
|
|
dnl
|
|
dnl See also mpn/sparc32/sparc-defs.m4 which uses the result of this test.
|
|
|
|
AC_DEFUN([GMP_ASM_SPARC_REGISTER],
|
|
[AC_REQUIRE([GMP_ASM_TEXT])
|
|
AC_CACHE_CHECK([if the assembler accepts ".register"],
|
|
gmp_cv_asm_sparc_register,
|
|
[GMP_TRY_ASSEMBLE(
|
|
[ $gmp_cv_asm_text
|
|
.register %g2,#scratch
|
|
],
|
|
[gmp_cv_asm_sparc_register=yes],
|
|
[gmp_cv_asm_sparc_register=no])])
|
|
|
|
GMP_DEFINE_RAW(["define(<HAVE_REGISTER>,<$gmp_cv_asm_sparc_register>)"])
|
|
])
|
|
|
|
|
|
dnl GMP_C_ATTRIBUTE_CONST
|
|
dnl ---------------------
|
|
|
|
AC_DEFUN([GMP_C_ATTRIBUTE_CONST],
|
|
[AC_CACHE_CHECK([whether gcc __attribute__ ((const)) works],
|
|
gmp_cv_c_attribute_const,
|
|
[AC_TRY_COMPILE([int foo (int x) __attribute__ ((const));], ,
|
|
gmp_cv_c_attribute_const=yes, gmp_cv_c_attribute_const=no)
|
|
])
|
|
if test $gmp_cv_c_attribute_const = yes; then
|
|
AC_DEFINE(HAVE_ATTRIBUTE_CONST, 1,
|
|
[Define to 1 if the compiler accepts gcc style __attribute__ ((const))])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_C_ATTRIBUTE_MALLOC
|
|
dnl ----------------------
|
|
dnl gcc 2.95.x accepts __attribute__ ((malloc)) but with a warning that
|
|
dnl it's ignored. Pretend it doesn't exist in this case, to avoid that
|
|
dnl warning.
|
|
|
|
AC_DEFUN([GMP_C_ATTRIBUTE_MALLOC],
|
|
[AC_CACHE_CHECK([whether gcc __attribute__ ((malloc)) works],
|
|
gmp_cv_c_attribute_malloc,
|
|
[cat >conftest.c <<EOF
|
|
void *foo (int x) __attribute__ ((malloc));
|
|
EOF
|
|
gmp_compile="$CC $CFLAGS $CPPFLAGS -c conftest.c >conftest.out 2>&1"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
if grep "attribute directive ignored" conftest.out >/dev/null; then
|
|
gmp_cv_c_attribute_malloc=no
|
|
else
|
|
gmp_cv_c_attribute_malloc=yes
|
|
fi
|
|
else
|
|
gmp_cv_c_attribute_malloc=no
|
|
fi
|
|
cat conftest.out >&AC_FD_CC
|
|
rm -f conftest*
|
|
])
|
|
if test $gmp_cv_c_attribute_malloc = yes; then
|
|
AC_DEFINE(HAVE_ATTRIBUTE_MALLOC, 1,
|
|
[Define to 1 if the compiler accepts gcc style __attribute__ ((malloc))])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_C_ATTRIBUTE_MODE
|
|
dnl --------------------
|
|
dnl Introduced in gcc 2.2, but perhaps not in all Apple derived versions.
|
|
|
|
AC_DEFUN([GMP_C_ATTRIBUTE_MODE],
|
|
[AC_CACHE_CHECK([whether gcc __attribute__ ((mode (XX))) works],
|
|
gmp_cv_c_attribute_mode,
|
|
[AC_TRY_COMPILE([typedef int SItype __attribute__ ((mode (SI)));], ,
|
|
gmp_cv_c_attribute_mode=yes, gmp_cv_c_attribute_mode=no)
|
|
])
|
|
if test $gmp_cv_c_attribute_mode = yes; then
|
|
AC_DEFINE(HAVE_ATTRIBUTE_MODE, 1,
|
|
[Define to 1 if the compiler accepts gcc style __attribute__ ((mode (XX)))])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_C_ATTRIBUTE_NORETURN
|
|
dnl ------------------------
|
|
|
|
AC_DEFUN([GMP_C_ATTRIBUTE_NORETURN],
|
|
[AC_CACHE_CHECK([whether gcc __attribute__ ((noreturn)) works],
|
|
gmp_cv_c_attribute_noreturn,
|
|
[AC_TRY_COMPILE([void foo (int x) __attribute__ ((noreturn));], ,
|
|
gmp_cv_c_attribute_noreturn=yes, gmp_cv_c_attribute_noreturn=no)
|
|
])
|
|
if test $gmp_cv_c_attribute_noreturn = yes; then
|
|
AC_DEFINE(HAVE_ATTRIBUTE_NORETURN, 1,
|
|
[Define to 1 if the compiler accepts gcc style __attribute__ ((noreturn))])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_C_DOUBLE_FORMAT
|
|
dnl -------------------
|
|
dnl Determine the floating point format.
|
|
dnl
|
|
dnl The object file is grepped, in order to work when cross compiling. A
|
|
dnl start and end sequence is included to avoid false matches, and
|
|
dnl allowance is made for the desired data crossing an "od -b" line
|
|
dnl boundary. The test number is a small integer so it should appear
|
|
dnl exactly, no rounding or truncation etc.
|
|
dnl
|
|
dnl "od -b", incidentally, is supported even by Unix V7, and the awk script
|
|
dnl used doesn't have functions or anything, so even an "old" awk should
|
|
dnl suffice.
|
|
|
|
AC_DEFUN([GMP_C_DOUBLE_FORMAT],
|
|
[AC_REQUIRE([AC_PROG_CC])
|
|
AC_REQUIRE([AC_PROG_AWK])
|
|
AC_CACHE_CHECK([format of `double' floating point],
|
|
gmp_cv_c_double_format,
|
|
[gmp_cv_c_double_format=unknown
|
|
cat >conftest.c <<\EOF
|
|
[struct {
|
|
char before[8];
|
|
double x;
|
|
char after[8];
|
|
} foo = {
|
|
{ '\001', '\043', '\105', '\147', '\211', '\253', '\315', '\357' },
|
|
-123456789.0,
|
|
{ '\376', '\334', '\272', '\230', '\166', '\124', '\062', '\020' },
|
|
};]
|
|
EOF
|
|
gmp_compile="$CC $CFLAGS $CPPFLAGS -c conftest.c >&AC_FD_CC 2>&1"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
cat >conftest.awk <<\EOF
|
|
[
|
|
BEGIN {
|
|
found = 0
|
|
}
|
|
|
|
{
|
|
for (f = 2; f <= NF; f++)
|
|
{
|
|
for (i = 0; i < 23; i++)
|
|
got[i] = got[i+1];
|
|
got[23] = $f;
|
|
|
|
# match the special begin and end sequences
|
|
if (got[0] != "001") continue
|
|
if (got[1] != "043") continue
|
|
if (got[2] != "105") continue
|
|
if (got[3] != "147") continue
|
|
if (got[4] != "211") continue
|
|
if (got[5] != "253") continue
|
|
if (got[6] != "315") continue
|
|
if (got[7] != "357") continue
|
|
if (got[16] != "376") continue
|
|
if (got[17] != "334") continue
|
|
if (got[18] != "272") continue
|
|
if (got[19] != "230") continue
|
|
if (got[20] != "166") continue
|
|
if (got[21] != "124") continue
|
|
if (got[22] != "062") continue
|
|
if (got[23] != "020") continue
|
|
|
|
saw = " (" got[8] " " got[9] " " got[10] " " got[11] " " got[12] " " got[13] " " got[14] " " got[15] ")"
|
|
|
|
if (got[8] == "000" && \
|
|
got[9] == "000" && \
|
|
got[10] == "000" && \
|
|
got[11] == "124" && \
|
|
got[12] == "064" && \
|
|
got[13] == "157" && \
|
|
got[14] == "235" && \
|
|
got[15] == "301")
|
|
{
|
|
print "IEEE little endian"
|
|
found = 1
|
|
exit
|
|
}
|
|
|
|
# Little endian with the two 4-byte halves swapped, as used by ARM
|
|
# when the chip is in little endian mode.
|
|
#
|
|
if (got[8] == "064" && \
|
|
got[9] == "157" && \
|
|
got[10] == "235" && \
|
|
got[11] == "301" && \
|
|
got[12] == "000" && \
|
|
got[13] == "000" && \
|
|
got[14] == "000" && \
|
|
got[15] == "124")
|
|
{
|
|
print "IEEE little endian, swapped halves"
|
|
found = 1
|
|
exit
|
|
}
|
|
|
|
# gcc 2.95.4 on one GNU/Linux ARM system was seen generating 000 in
|
|
# the last byte, whereas 124 is correct. Not sure where the bug
|
|
# actually lies, but a running program didn't seem to get a full
|
|
# mantissa worth of working bits.
|
|
#
|
|
# We match this case explicitly so we can give a nice result message,
|
|
# but we deliberately exclude it from the normal IEEE double setups
|
|
# since it's too broken.
|
|
#
|
|
if (got[8] == "064" && \
|
|
got[9] == "157" && \
|
|
got[10] == "235" && \
|
|
got[11] == "301" && \
|
|
got[12] == "000" && \
|
|
got[13] == "000" && \
|
|
got[14] == "000" && \
|
|
got[15] == "000")
|
|
{
|
|
print "bad ARM software floats"
|
|
found = 1
|
|
exit
|
|
}
|
|
|
|
if (got[8] == "301" && \
|
|
got[9] == "235" && \
|
|
got[10] == "157" && \
|
|
got[11] == "064" && \
|
|
got[12] == "124" && \
|
|
got[13] == "000" && \
|
|
got[14] == "000" && \
|
|
got[15] == "000")
|
|
{
|
|
print "IEEE big endian"
|
|
found = 1
|
|
exit
|
|
}
|
|
|
|
if (got[8] == "353" && \
|
|
got[9] == "315" && \
|
|
got[10] == "242" && \
|
|
got[11] == "171" && \
|
|
got[12] == "000" && \
|
|
got[13] == "240" && \
|
|
got[14] == "000" && \
|
|
got[15] == "000")
|
|
{
|
|
print "VAX D"
|
|
found = 1
|
|
exit
|
|
}
|
|
|
|
if (got[8] == "275" && \
|
|
got[9] == "301" && \
|
|
got[10] == "064" && \
|
|
got[11] == "157" && \
|
|
got[12] == "000" && \
|
|
got[13] == "124" && \
|
|
got[14] == "000" && \
|
|
got[15] == "000")
|
|
{
|
|
print "VAX G"
|
|
found = 1
|
|
exit
|
|
}
|
|
|
|
if (got[8] == "300" && \
|
|
got[9] == "033" && \
|
|
got[10] == "353" && \
|
|
got[11] == "171" && \
|
|
got[12] == "242" && \
|
|
got[13] == "240" && \
|
|
got[14] == "000" && \
|
|
got[15] == "000")
|
|
{
|
|
print "Cray CFP"
|
|
found = 1
|
|
exit
|
|
}
|
|
}
|
|
}
|
|
|
|
END {
|
|
if (! found)
|
|
print "unknown", saw
|
|
}
|
|
]
|
|
EOF
|
|
gmp_cv_c_double_format=`od -b conftest.$OBJEXT | $AWK -f conftest.awk`
|
|
case $gmp_cv_c_double_format in
|
|
unknown*)
|
|
echo "cannot match anything, conftest.$OBJEXT contains" >&AC_FD_CC
|
|
od -b conftest.$OBJEXT >&AC_FD_CC
|
|
;;
|
|
esac
|
|
else
|
|
AC_MSG_WARN([oops, cannot compile test program])
|
|
fi
|
|
rm -f conftest*
|
|
])
|
|
|
|
AH_VERBATIM([HAVE_DOUBLE],
|
|
[/* Define one of the following to 1 for the format of a `double'.
|
|
If your format is not among these choices, or you don't know what it is,
|
|
then leave all undefined.
|
|
IEEE_LITTLE_SWAPPED means little endian, but with the two 4-byte halves
|
|
swapped, as used by ARM CPUs in little endian mode. */
|
|
#undef HAVE_DOUBLE_IEEE_BIG_ENDIAN
|
|
#undef HAVE_DOUBLE_IEEE_LITTLE_ENDIAN
|
|
#undef HAVE_DOUBLE_IEEE_LITTLE_SWAPPED
|
|
#undef HAVE_DOUBLE_VAX_D
|
|
#undef HAVE_DOUBLE_VAX_G
|
|
#undef HAVE_DOUBLE_CRAY_CFP])
|
|
|
|
case $gmp_cv_c_double_format in
|
|
"IEEE big endian")
|
|
AC_DEFINE(HAVE_DOUBLE_IEEE_BIG_ENDIAN, 1)
|
|
GMP_DEFINE_RAW("define_not_for_expansion(\`HAVE_DOUBLE_IEEE_BIG_ENDIAN')", POST)
|
|
;;
|
|
"IEEE little endian")
|
|
AC_DEFINE(HAVE_DOUBLE_IEEE_LITTLE_ENDIAN, 1)
|
|
GMP_DEFINE_RAW("define_not_for_expansion(\`HAVE_DOUBLE_IEEE_LITTLE_ENDIAN')", POST)
|
|
;;
|
|
"IEEE little endian, swapped halves")
|
|
AC_DEFINE(HAVE_DOUBLE_IEEE_LITTLE_SWAPPED, 1) ;;
|
|
"VAX D")
|
|
AC_DEFINE(HAVE_DOUBLE_VAX_D, 1) ;;
|
|
"VAX G")
|
|
AC_DEFINE(HAVE_DOUBLE_VAX_G, 1) ;;
|
|
"Cray CFP")
|
|
AC_DEFINE(HAVE_DOUBLE_CRAY_CFP, 1) ;;
|
|
"bad ARM software floats")
|
|
;;
|
|
unknown*)
|
|
AC_MSG_WARN([Could not determine float format.])
|
|
AC_MSG_WARN([Conversions to and from "double" may be slow.])
|
|
;;
|
|
*)
|
|
AC_MSG_WARN([oops, unrecognised float format: $gmp_cv_c_double_format])
|
|
;;
|
|
esac
|
|
])
|
|
|
|
|
|
dnl GMP_C_STDARG
|
|
dnl ------------
|
|
dnl Test whether to use <stdarg.h> or <varargs.h>.
|
|
dnl
|
|
dnl Notice the AC_DEFINE here is HAVE_STDARG to avoid clashing with
|
|
dnl HAVE_STDARG_H which could arise from AC_CHECK_HEADERS.
|
|
dnl
|
|
dnl This test might be slight overkill, after all there's really only going
|
|
dnl to be ANSI or K&R and the two can be differentiated by AC_PROG_CC_STDC
|
|
dnl or very likely by the setups for _PROTO in mpir.h. On the other hand
|
|
dnl this test is nice and direct, being what we're going to actually use.
|
|
|
|
AC_DEFUN([GMP_C_STDARG],
|
|
[AC_CACHE_CHECK([whether <stdarg.h> exists and works],
|
|
gmp_cv_c_stdarg,
|
|
[AC_TRY_COMPILE(
|
|
[#include <stdarg.h>
|
|
int foo (int x, ...)
|
|
{
|
|
va_list ap;
|
|
int y;
|
|
va_start (ap, x);
|
|
y = va_arg (ap, int);
|
|
va_end (ap);
|
|
return y;
|
|
}],,
|
|
gmp_cv_c_stdarg=yes, gmp_cv_c_stdarg=no)
|
|
])
|
|
if test $gmp_cv_c_stdarg = yes; then
|
|
AC_DEFINE(HAVE_STDARG, 1, [Define to 1 if <stdarg.h> exists and works])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_FUNC_ALLOCA
|
|
dnl ---------------
|
|
dnl Determine whether "alloca" is available. This is AC_FUNC_ALLOCA from
|
|
dnl autoconf, but changed so it doesn't use alloca.c if alloca() isn't
|
|
dnl available, and also to use gmp-impl.h for the conditionals detecting
|
|
dnl compiler builtin alloca's.
|
|
|
|
AC_DEFUN([GMP_FUNC_ALLOCA],
|
|
[AC_REQUIRE([GMP_HEADER_ALLOCA])
|
|
AC_CACHE_CHECK([for alloca (via gmp-impl.h)],
|
|
gmp_cv_func_alloca,
|
|
[AC_TRY_LINK(
|
|
GMP_INCLUDE_GMP_H
|
|
[#include "$srcdir/gmp-impl.h"
|
|
],
|
|
[char *p = (char *) alloca (1);],
|
|
gmp_cv_func_alloca=yes,
|
|
gmp_cv_func_alloca=no)])
|
|
if test $gmp_cv_func_alloca = yes; then
|
|
AC_DEFINE(HAVE_ALLOCA, 1, [Define to 1 if alloca() works (via gmp-impl.h).])
|
|
fi
|
|
])
|
|
|
|
AC_DEFUN([GMP_HEADER_ALLOCA],
|
|
[# The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
|
|
# for constant arguments. Useless!
|
|
AC_CACHE_CHECK([for working alloca.h],
|
|
gmp_cv_header_alloca,
|
|
[AC_TRY_LINK([#include <alloca.h>],
|
|
[char *p = (char *) alloca (2 * sizeof (int));],
|
|
gmp_cv_header_alloca=yes,
|
|
gmp_cv_header_alloca=no)])
|
|
if test $gmp_cv_header_alloca = yes; then
|
|
AC_DEFINE(HAVE_ALLOCA_H, 1,
|
|
[Define to 1 if you have <alloca.h> and it should be used (not on Ultrix).])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_OPTION_ALLOCA
|
|
dnl -----------------
|
|
dnl Decide what to do about --enable-alloca from the user.
|
|
dnl This is a macro so it can require GMP_FUNC_ALLOCA.
|
|
|
|
AC_DEFUN([GMP_OPTION_ALLOCA],
|
|
[AC_REQUIRE([GMP_FUNC_ALLOCA])
|
|
AC_CACHE_CHECK([how to allocate temporary memory],
|
|
gmp_cv_option_alloca,
|
|
[case $enable_alloca in
|
|
yes)
|
|
gmp_cv_option_alloca=alloca
|
|
;;
|
|
no)
|
|
gmp_cv_option_alloca=malloc-reentrant
|
|
;;
|
|
reentrant | notreentrant)
|
|
case $gmp_cv_func_alloca in
|
|
yes) gmp_cv_option_alloca=alloca ;;
|
|
*) gmp_cv_option_alloca=malloc-$enable_alloca ;;
|
|
esac
|
|
;;
|
|
*)
|
|
gmp_cv_option_alloca=$enable_alloca
|
|
;;
|
|
esac
|
|
])
|
|
|
|
AH_VERBATIM([WANT_TMP],
|
|
[/* Define one of these to 1 for the desired temporary memory allocation
|
|
method, per --enable-alloca. */
|
|
#undef WANT_TMP_ALLOCA
|
|
#undef WANT_TMP_REENTRANT
|
|
#undef WANT_TMP_NOTREENTRANT
|
|
#undef WANT_TMP_DEBUG])
|
|
|
|
case $gmp_cv_option_alloca in
|
|
alloca)
|
|
if test $gmp_cv_func_alloca = no; then
|
|
AC_MSG_ERROR([--enable-alloca=alloca specified, but alloca not available])
|
|
fi
|
|
AC_DEFINE(WANT_TMP_ALLOCA)
|
|
TAL_OBJECT=tal-reent$U.lo
|
|
;;
|
|
malloc-reentrant)
|
|
AC_DEFINE(WANT_TMP_REENTRANT)
|
|
TAL_OBJECT=tal-reent$U.lo
|
|
;;
|
|
malloc-notreentrant)
|
|
AC_DEFINE(WANT_TMP_NOTREENTRANT)
|
|
TAL_OBJECT=tal-notreent$U.lo
|
|
;;
|
|
debug)
|
|
AC_DEFINE(WANT_TMP_DEBUG)
|
|
TAL_OBJECT=tal-debug$U.lo
|
|
;;
|
|
*)
|
|
# checks at the start of configure.in should protect us
|
|
AC_MSG_ERROR([unrecognised --enable-alloca=$gmp_cv_option_alloca])
|
|
;;
|
|
esac
|
|
AC_SUBST(TAL_OBJECT)
|
|
])
|
|
|
|
|
|
dnl GMP_FUNC_SSCANF_WRITABLE_INPUT
|
|
dnl ------------------------------
|
|
dnl Determine whether sscanf requires a writable input string.
|
|
dnl
|
|
dnl It might be nicer to run a program to determine this when doing a
|
|
dnl native build, but the systems afflicted are few and far between these
|
|
dnl days, so it seems good enough just to list them.
|
|
|
|
AC_DEFUN([GMP_FUNC_SSCANF_WRITABLE_INPUT],
|
|
[AC_CACHE_CHECK([whether sscanf needs writable input],
|
|
gmp_cv_func_sscanf_writable_input,
|
|
[case $host in
|
|
*-*-hpux9 | *-*-hpux9.*)
|
|
gmp_cv_func_sscanf_writable_input=yes ;;
|
|
*) gmp_cv_func_sscanf_writable_input=no ;;
|
|
esac
|
|
])
|
|
case $gmp_cv_func_sscanf_writable_input in
|
|
yes) AC_DEFINE(SSCANF_WRITABLE_INPUT, 1,
|
|
[Define to 1 if sscanf requires writable inputs]) ;;
|
|
no) ;;
|
|
*) AC_MSG_ERROR([unrecognised \$gmp_cv_func_sscanf_writable_input]) ;;
|
|
esac
|
|
])
|
|
|
|
|
|
dnl GMP_FUNC_VSNPRINTF
|
|
dnl ------------------
|
|
dnl Check whether vsnprintf exists, and works properly.
|
|
dnl
|
|
dnl Systems without vsnprintf include mingw32
|
|
dnl
|
|
dnl Sparc Solaris 2.7 in 64-bit mode doesn't always truncate, making
|
|
dnl vsnprintf like vsprintf, and hence completely useless. On one system a
|
|
dnl literal string is enough to provoke the problem, on another a "%n" was
|
|
dnl needed. There seems to be something weird going on with the optimizer
|
|
dnl or something, since on the first system adding a second check with
|
|
dnl "%n", or even just an initialized local variable, makes it work. In
|
|
dnl any case, without bothering to get to the bottom of this, the two
|
|
dnl program runs in the code below end up successfully detecting the
|
|
dnl problem.
|
|
dnl
|
|
dnl glibc 2.0.x returns either -1 or bufsize-1 for an overflow (both seen,
|
|
dnl not sure which 2.0.x does which), but still puts the correct null
|
|
dnl terminated result into the buffer.
|
|
|
|
AC_DEFUN([GMP_FUNC_VSNPRINTF],
|
|
[AC_REQUIRE([GMP_C_STDARG])
|
|
AC_CHECK_FUNC(vsnprintf,
|
|
[gmp_vsnprintf_exists=yes],
|
|
[gmp_vsnprintf_exists=no])
|
|
if test "$gmp_vsnprintf_exists" = no; then
|
|
gmp_cv_func_vsnprintf=no
|
|
else
|
|
AC_CACHE_CHECK([whether vsnprintf works],
|
|
gmp_cv_func_vsnprintf,
|
|
[gmp_cv_func_vsnprintf=yes
|
|
for i in 'check ("hello world");' 'int n; check ("%nhello world", &n);'; do
|
|
AC_TRY_RUN([
|
|
#include <string.h> /* for strcmp */
|
|
#include <stdio.h> /* for vsnprintf */
|
|
|
|
#if HAVE_STDARG
|
|
#include <stdarg.h>
|
|
#else
|
|
#include <varargs.h>
|
|
#endif
|
|
|
|
int
|
|
#if HAVE_STDARG
|
|
check (const char *fmt, ...)
|
|
#else
|
|
check (va_alist)
|
|
va_dcl
|
|
#endif
|
|
{
|
|
static char buf[128];
|
|
va_list ap;
|
|
int ret;
|
|
|
|
#if HAVE_STDARG
|
|
va_start (ap, fmt);
|
|
#else
|
|
char *fmt;
|
|
va_start (ap);
|
|
fmt = va_arg (ap, char *);
|
|
#endif
|
|
|
|
ret = vsnprintf (buf, 4, fmt, ap);
|
|
|
|
if (strcmp (buf, "hel") != 0)
|
|
exit (1);
|
|
|
|
/* allowed return values */
|
|
if (ret != -1 && ret != 3 && ret != 11)
|
|
exit (2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
main ()
|
|
{
|
|
$i
|
|
exit (0);
|
|
}
|
|
],
|
|
[:],
|
|
[gmp_cv_func_vsnprintf=no; break],
|
|
[gmp_cv_func_vsnprintf=probably; break])
|
|
done
|
|
])
|
|
if test "$gmp_cv_func_vsnprintf" = probably; then
|
|
AC_MSG_WARN([cannot check for properly working vsnprintf when cross compiling, will assume it's ok])
|
|
fi
|
|
if test "$gmp_cv_func_vsnprintf" != no; then
|
|
AC_DEFINE(HAVE_VSNPRINTF,1,
|
|
[Define to 1 if you have the `vsnprintf' function and it works properly.])
|
|
fi
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_H_ANSI
|
|
dnl ----------
|
|
dnl Check whether mpir.h recognises the compiler as ANSI capable.
|
|
|
|
AC_DEFUN([GMP_H_ANSI],
|
|
[AC_REQUIRE([AC_PROG_CC_STDC])
|
|
case $ac_cv_prog_cc_stdc in
|
|
no)
|
|
;;
|
|
*)
|
|
AC_TRY_COMPILE(
|
|
GMP_INCLUDE_GMP_H
|
|
[#if ! __GMP_HAVE_PROTOTYPES
|
|
die die die
|
|
#endif
|
|
],,,
|
|
[AC_MSG_WARN([mpir.h doesnt recognise compiler as ANSI, prototypes and "const" will be unavailable])])
|
|
;;
|
|
esac
|
|
])
|
|
|
|
|
|
dnl GMP_H_EXTERN_INLINE
|
|
dnl -------------------
|
|
dnl If the compiler has an "inline" of some sort, check whether the
|
|
dnl #ifdef's in mpir.h recognise it.
|
|
|
|
AC_DEFUN([GMP_H_EXTERN_INLINE],
|
|
[AC_REQUIRE([AC_C_INLINE])
|
|
case $ac_cv_c_inline in
|
|
no) ;;
|
|
*)
|
|
AC_TRY_COMPILE(
|
|
[#define __GMP_WITHIN_CONFIGURE_INLINE 1
|
|
]GMP_INCLUDE_GMP_H[
|
|
#ifndef __GMP_EXTERN_INLINE
|
|
die die die
|
|
#endif
|
|
],,,
|
|
[case $ac_cv_c_inline in
|
|
yes) tmp_inline=inline ;;
|
|
*) tmp_inline=$ac_cv_c_inline ;;
|
|
esac
|
|
AC_MSG_WARN([mpir.h doesnt recognise compiler "$tmp_inline", inlines will be unavailable])])
|
|
;;
|
|
esac
|
|
])
|
|
|
|
|
|
dnl GMP_H_HAVE_FILE
|
|
dnl ---------------
|
|
dnl Check whether the #ifdef's in mpir.h recognise when stdio.h has been
|
|
dnl included to get FILE.
|
|
|
|
AC_DEFUN([GMP_H_HAVE_FILE],
|
|
[AC_TRY_COMPILE(
|
|
[#include <stdio.h>]
|
|
GMP_INCLUDE_GMP_H
|
|
[#if ! _GMP_H_HAVE_FILE
|
|
die die die
|
|
#endif
|
|
],,,
|
|
[AC_MSG_WARN([mpir.h doesnt recognise <stdio.h>, FILE prototypes will be unavailable])])
|
|
])
|
|
|
|
|
|
dnl GMP_PROG_CC_FOR_BUILD
|
|
dnl ---------------------
|
|
dnl Establish CC_FOR_BUILD, a C compiler for the build system.
|
|
dnl
|
|
dnl If CC_FOR_BUILD is set then it's expected to work, likewise the old
|
|
dnl style HOST_CC, otherwise some likely candidates are tried, the same as
|
|
dnl configfsf.guess.
|
|
|
|
AC_DEFUN([GMP_PROG_CC_FOR_BUILD],
|
|
[AC_REQUIRE([AC_PROG_CC])
|
|
if test -n "$CC_FOR_BUILD"; then
|
|
GMP_PROG_CC_FOR_BUILD_WORKS($CC_FOR_BUILD,,
|
|
[AC_MSG_ERROR([Specified CC_FOR_BUILD doesn't seem to work])])
|
|
elif test -n "$HOST_CC"; then
|
|
GMP_PROG_CC_FOR_BUILD_WORKS($HOST_CC,
|
|
[CC_FOR_BUILD=$HOST_CC],
|
|
[AC_MSG_ERROR([Specified HOST_CC doesn't seem to work])])
|
|
else
|
|
for i in "$CC" "$CC $CFLAGS $CPPFLAGS" cc gcc c89 c99; do
|
|
GMP_PROG_CC_FOR_BUILD_WORKS($i,
|
|
[CC_FOR_BUILD=$i
|
|
break])
|
|
done
|
|
if test -z "$CC_FOR_BUILD"; then
|
|
AC_MSG_ERROR([Cannot find a build system compiler])
|
|
fi
|
|
fi
|
|
|
|
AC_ARG_VAR(CC_FOR_BUILD,[build system C compiler])
|
|
AC_SUBST(CC_FOR_BUILD)
|
|
])
|
|
|
|
|
|
dnl GMP_PROG_CC_FOR_BUILD_WORKS(cc/cflags[,[action-if-good][,action-if-bad]])
|
|
dnl -------------------------------------------------------------------------
|
|
dnl See if the given cc/cflags works on the build system.
|
|
dnl
|
|
dnl It seems easiest to just use the default compiler output, rather than
|
|
dnl figuring out the .exe or whatever at this stage.
|
|
|
|
AC_DEFUN([GMP_PROG_CC_FOR_BUILD_WORKS],
|
|
[AC_MSG_CHECKING([build system compiler $1])
|
|
# remove anything that might look like compiler output to our "||" expression
|
|
rm -f conftest* a.out b.out a.exe a_out.exe
|
|
cat >conftest.c <<EOF
|
|
int
|
|
main ()
|
|
{
|
|
exit(0);
|
|
}
|
|
EOF
|
|
gmp_compile="$1 conftest.c"
|
|
cc_for_build_works=no
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
if (./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest) >&AC_FD_CC 2>&1; then
|
|
cc_for_build_works=yes
|
|
fi
|
|
fi
|
|
rm -f conftest* a.out b.out a.exe a_out.exe
|
|
AC_MSG_RESULT($cc_for_build_works)
|
|
if test "$cc_for_build_works" = yes; then
|
|
ifelse([$2],,:,[$2])
|
|
else
|
|
ifelse([$3],,:,[$3])
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_PROG_CPP_FOR_BUILD
|
|
dnl ---------------------
|
|
dnl Establish CPP_FOR_BUILD, the build system C preprocessor.
|
|
dnl The choices tried here are the same as AC_PROG_CPP, but with
|
|
dnl CC_FOR_BUILD.
|
|
|
|
AC_DEFUN([GMP_PROG_CPP_FOR_BUILD],
|
|
[AC_REQUIRE([GMP_PROG_CC_FOR_BUILD])
|
|
AC_MSG_CHECKING([for build system preprocessor])
|
|
if test -z "$CPP_FOR_BUILD"; then
|
|
AC_CACHE_VAL(gmp_cv_prog_cpp_for_build,
|
|
[cat >conftest.c <<EOF
|
|
#define FOO BAR
|
|
EOF
|
|
for i in "$CC_FOR_BUILD -E" "$CC_FOR_BUILD -E -traditional-cpp" "/lib/cpp"; do
|
|
gmp_compile="$i conftest.c"
|
|
if AC_TRY_EVAL(gmp_compile) >&AC_FD_CC 2>&1; then
|
|
gmp_cv_prog_cpp_for_build=$i
|
|
break
|
|
fi
|
|
done
|
|
rm -f conftest* a.out b.out a.exe a_out.exe
|
|
if test -z "$gmp_cv_prog_cpp_for_build"; then
|
|
AC_MSG_ERROR([Cannot find build system C preprocessor.])
|
|
fi
|
|
])
|
|
CPP_FOR_BUILD=$gmp_cv_prog_cpp_for_build
|
|
fi
|
|
AC_MSG_RESULT([$CPP_FOR_BUILD])
|
|
|
|
AC_ARG_VAR(CPP_FOR_BUILD,[build system C preprocessor])
|
|
AC_SUBST(CPP_FOR_BUILD)
|
|
])
|
|
|
|
|
|
dnl GMP_PROG_EXEEXT_FOR_BUILD
|
|
dnl -------------------------
|
|
dnl Determine EXEEXT_FOR_BUILD, the build system executable suffix.
|
|
dnl
|
|
dnl The idea is to find what "-o conftest$foo" will make it possible to run
|
|
dnl the program with ./conftest. On Unix-like systems this is of course
|
|
dnl nothing, for DOS it's ".exe", or for a strange RISC OS foreign file
|
|
dnl system cross compile it can be ",ff8" apparently. Not sure if the
|
|
dnl latter actually applies to a build-system executable, maybe it doesn't,
|
|
dnl but it won't hurt to try.
|
|
|
|
AC_DEFUN([GMP_PROG_EXEEXT_FOR_BUILD],
|
|
[AC_REQUIRE([GMP_PROG_CC_FOR_BUILD])
|
|
AC_CACHE_CHECK([for build system executable suffix],
|
|
gmp_cv_prog_exeext_for_build,
|
|
[cat >conftest.c <<EOF
|
|
int
|
|
main ()
|
|
{
|
|
exit (0);
|
|
}
|
|
EOF
|
|
for i in .exe ,ff8 ""; do
|
|
gmp_compile="$CC_FOR_BUILD conftest.c -o conftest$i"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
if (./conftest) 2>&AC_FD_CC; then
|
|
gmp_cv_prog_exeext_for_build=$i
|
|
break
|
|
fi
|
|
fi
|
|
done
|
|
rm -f conftest*
|
|
if test "${gmp_cv_prog_exeext_for_build+set}" != set; then
|
|
AC_MSG_ERROR([Cannot determine executable suffix])
|
|
fi
|
|
])
|
|
AC_SUBST(EXEEXT_FOR_BUILD,$gmp_cv_prog_exeext_for_build)
|
|
])
|
|
|
|
|
|
dnl GMP_C_FOR_BUILD_ANSI
|
|
dnl --------------------
|
|
dnl Determine whether CC_FOR_BUILD is ANSI, and establish U_FOR_BUILD
|
|
dnl accordingly.
|
|
|
|
AC_DEFUN([GMP_C_FOR_BUILD_ANSI],
|
|
[AC_REQUIRE([GMP_PROG_CC_FOR_BUILD])
|
|
AC_CACHE_CHECK([whether build system compiler is ANSI],
|
|
gmp_cv_c_for_build_ansi,
|
|
[cat >conftest.c <<EOF
|
|
int
|
|
main (int argc, char *argv[])
|
|
{
|
|
exit(0);
|
|
}
|
|
EOF
|
|
gmp_compile="$CC_FOR_BUILD conftest.c"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
gmp_cv_c_for_build_ansi=yes
|
|
else
|
|
gmp_cv_c_for_build_ansi=no
|
|
fi
|
|
rm -f conftest* a.out b.out a.exe a_out.exe
|
|
])
|
|
if test "$gmp_cv_c_for_build_ansi" = yes; then
|
|
U_FOR_BUILD=
|
|
else
|
|
AC_SUBST(U_FOR_BUILD,_)
|
|
fi
|
|
])
|
|
|
|
|
|
dnl GMP_CHECK_LIBM_FOR_BUILD
|
|
dnl ------------------------
|
|
dnl Establish LIBM_FOR_BUILD as -lm, if that seems to work.
|
|
dnl
|
|
dnl Libtool AC_CHECK_LIBM also uses -lmw on *-ncr-sysv4.3*, if it works.
|
|
dnl Don't know what that does, lets assume it's not needed just for log().
|
|
|
|
AC_DEFUN([GMP_CHECK_LIBM_FOR_BUILD],
|
|
[AC_REQUIRE([GMP_PROG_CC_FOR_BUILD])
|
|
AC_CACHE_CHECK([for build system compiler math library],
|
|
gmp_cv_check_libm_for_build,
|
|
[cat >conftest.c <<EOF
|
|
int
|
|
main ()
|
|
{
|
|
exit(0);
|
|
}
|
|
double d;
|
|
double
|
|
foo ()
|
|
{
|
|
return log (d);
|
|
}
|
|
EOF
|
|
gmp_compile="$CC_FOR_BUILD conftest.c -lm"
|
|
if AC_TRY_EVAL(gmp_compile); then
|
|
gmp_cv_check_libm_for_build=-lm
|
|
else
|
|
gmp_cv_check_libm_for_build=no
|
|
fi
|
|
rm -f conftest* a.out b.out a.exe a_out.exe
|
|
])
|
|
case $gmp_cv_check_libm_for_build in
|
|
yes) AC_SUBST(LIBM_FOR_BUILD,-lm) ;;
|
|
no) LIBM_FOR_BUILD= ;;
|
|
*) LIBM_FOR_BUILD=$gmp_cv_check_libm_for_build ;;
|
|
esac
|
|
])
|