[libpng16] Updated configure.ac from autoupdate: added --enable-werror option.
Also some layout regularization and removal of introduced tab characters (replaced with 3-character indentation). Obsolete macros identified by autoupdate have been removed; the replacements are all in 2.59 so the pre-req hasn't been changed. --enable-werror checks for support for -Werror (or the given argument) in the compiler. This mimics the gcc configure option by allowing -Werror to be turned on safely; without the option the tests written in configure itself fail compilation because they cause compiler warnings.
This commit is contained in:
John Bowler
Glenn Randers-Pehrson
parent
8fb6c6a9b3
commit
1eb2c48458
9
ANNOUNCE
9
ANNOUNCE
@ -123,6 +123,15 @@ Version 1.6.0beta07 [January 25, 2012]
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compiler issues slightly different warnings from those issued by the
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current vesions of GCC. This eliminates those warnings by
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adding/removing casts and small code rewrites.
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Updated configure.ac from autoupdate: added --enable-werror option.
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Also some layout regularization and removal of introduced tab characters
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(replaced with 3-character indentation). Obsolete macros identified by
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autoupdate have been removed; the replacements are all in 2.59 so
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the pre-req hasn't been changed. --enable-werror checks for support
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for -Werror (or the given argument) in the compiler. This mimics the
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gcc configure option by allowing -Werror to be turned on safely; without
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the option the tests written in configure itself fail compilation because
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they cause compiler warnings.
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Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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(subscription required; visit
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9
CHANGES
9
CHANGES
@ -3874,6 +3874,15 @@ Version 1.6.0beta07 [January 25, 2012]
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compiler issues slightly different warnings from those issued by the
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current vesions of GCC. This eliminates those warnings by
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adding/removing casts and small code rewrites.
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Updated configure.ac from autoupdate: added --enable-werror option.
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Also some layout regularization and removal of introduced tab characters
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(replaced with 3-character indentation). Obsolete macros identified by
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autoupdate have been removed; the replacements are all in 2.59 so
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the pre-req hasn't been changed. --enable-werror checks for support
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for -Werror (or the given argument) in the compiler. This mimics the
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gcc configure option by allowing -Werror to be turned on safely; without
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the option the tests written in configure itself fail compilation because
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they cause compiler warnings.
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Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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(subscription required; visit
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@ -94,6 +94,12 @@ CLEANFILES= *.tf? pngout.png libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc \
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MAINTAINERCLEANFILES = Makefile.in aclocal.m4 config.guess config.h.in \
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config.sub configure depcomp install-sh ltmain.sh missing
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# PNG_COPTS give extra options for the C compiler to be used on all compilation
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# steps (unless targe_CFLAGS is specified; that will take precedence over
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# AM_CFLAGS)
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PNG_COPTS = @PNG_COPTS@
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AM_CFLAGS = ${PNG_COPTS}
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# DFNCPP is normally just CPP - the C preprocessor - but on Solaris and maybe
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# other operating systems (NeXT?) the C preprocessor selected by configure
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# checks input tokens for validity - effectively it performs part of the ANSI-C
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64
configure.ac
64
configure.ac
@ -14,7 +14,7 @@ dnl Makefile.am to upgrade the package name.
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dnl This is here to prevent earlier autoconf from being used, it
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dnl should not be necessary to regenerate configure if the time
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dnl stamps are correct
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AC_PREREQ(2.59)
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AC_PREREQ([2.59])
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dnl Version number stuff here:
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@ -31,13 +31,13 @@ PNGLIB_RELEASE=0
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dnl End of version number stuff
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AC_CONFIG_SRCDIR([pngget.c])
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AM_CONFIG_HEADER(config.h)
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AC_CONFIG_HEADERS([config.h])
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# Checks for programs.
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AC_LANG([C])
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AC_PROG_CC
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AM_PROG_AS
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AC_PROG_LD
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LT_PATH_LD
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AC_PROG_CPP
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AC_CHECK_TOOL(SED, sed, :)
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AC_CHECK_TOOL(AWK, awk, :)
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@ -51,16 +51,18 @@ LT_INIT([win32-dll])
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# check this:
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AC_REQUIRE_CPP
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AC_MSG_CHECKING([for a C preprocessor that does not parse its input])
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AC_TRY_CPP([1.5.0 16BIT],
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AC_PREPROC_IFELSE([AC_LANG_SOURCE([[1.1.1 16BIT]])],
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[DFNCPP="$CPP"],
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[ DFNCPP=""
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sav_CPP="$CPP"
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for CPP in "${CC-cc} -E" "${CC-cc} -E -traditional-cpp" "/lib/cpp" "cpp"; do
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AC_TRY_CPP([1.5.0 16BIT],
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for CPP in "${CC-cc} -E" "${CC-cc} -E -traditional-cpp" "/lib/cpp" "cpp"
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do
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AC_PREPROC_IFELSE([AC_LANG_SOURCE([[1.1.1 16BIT]])],
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[DFNCPP="$CPP"]
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[break],,)
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done
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CPP="$sav_CPP"])
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CPP="$sav_CPP"
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])
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if test -n "$DFNCPP"; then
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AC_MSG_RESULT([$DFNCPP])
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AC_SUBST(DFNCPP)
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@ -68,6 +70,31 @@ else
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AC_MSG_FAILURE([not found], 1)
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fi
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# -Werror cannot be passed to GCC in CFLAGS because configure will fail (it
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# checks the compiler with a program that generates a warning), add the
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# following option to deal with this
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AC_ARG_VAR(PNG_COPTS,
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[additional flags for the C compiler, use this for options that would]
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[cause configure itself to fail])
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AC_ARG_ENABLE(werror,
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AS_HELP_STRING([[[--enable-werror[=OPT]]]],
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[Pass -Werror or the given argument to the compiler if it is supported]),
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[test "$enable_werror" = "yes" && enable_werror="-Werror"
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if test "$enable_werror" != "no"; then
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sav_CFLAGS="$CFLAGS"
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CFLAGS="$enable_werror $CFLAGS"
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AC_MSG_CHECKING([if the compiler allows $enable_werror])
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AC_COMPILE_IFELSE(
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[AC_LANG_SOURCE([
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[int main(int argc, char **argv){]
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[return argv[argc-1][0];]
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[}]])],
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AC_MSG_RESULT(yes)
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PNG_COPTS="$PNG_COPTS $enable_werror",
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AC_MSG_RESULT(no))
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CFLAGS="$sav_CFLAGS"
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fi],)
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# Checks for header files.
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AC_HEADER_STDC
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AC_CHECK_HEADERS([malloc.h stdlib.h string.h strings.h])
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@ -80,16 +107,15 @@ AC_C_RESTRICT
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# Checks for library functions.
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AC_FUNC_STRTOD
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AC_CHECK_FUNCS([memset], , AC_ERROR([memset not found in libc]))
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AC_CHECK_FUNCS([pow], , AC_CHECK_LIB(m, pow, , AC_ERROR([cannot find pow])) )
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AC_CHECK_FUNCS([memset], , AC_MSG_ERROR(memset not found in libc))
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AC_CHECK_FUNCS([pow], , AC_CHECK_LIB(m, pow, , AC_MSG_ERROR(cannot find pow)) )
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AC_ARG_WITH(zlib-prefix,
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AC_HELP_STRING([--with-zlib-prefix],
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AS_HELP_STRING([[[--with-zlib-prefix]]],
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[prefix that may have been used in installed zlib]),
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[ZPREFIX=${withval}],
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[ZPREFIX='z_'])
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AC_CHECK_LIB(z, zlibVersion, ,
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AC_CHECK_LIB(z, ${ZPREFIX}zlibVersion, ,
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AC_ERROR([zlib not installed])))
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AC_CHECK_LIB(z, ${ZPREFIX}zlibVersion, , AC_MSG_ERROR(zlib not installed)))
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# The following is for pngvalid, to ensure it catches FP errors even on
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# platforms that don't enable FP exceptions, the function appears in the math
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@ -157,22 +183,22 @@ AC_SUBST(PNGLIB_RELEASE)
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# Additional arguments (and substitutions)
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# Allow the pkg-config directory to be set
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AC_ARG_WITH(pkgconfigdir,
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AC_HELP_STRING([--with-pkgconfigdir],
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AS_HELP_STRING([[[--with-pkgconfigdir]]],
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[Use the specified pkgconfig dir (default is libdir/pkgconfig)]),
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[pkgconfigdir=${withval}],
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[pkgconfigdir='${libdir}/pkgconfig'])
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AC_SUBST([pkgconfigdir])
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AC_MSG_NOTICE([pkgconfig directory is ${pkgconfigdir}])
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AC_MSG_NOTICE([[pkgconfig directory is ${pkgconfigdir}]])
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# Make the *-config binary config scripts optional
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AC_ARG_WITH(binconfigs,
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AC_HELP_STRING([--with-binconfigs],
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AS_HELP_STRING([[[--with-binconfigs]]],
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[Generate shell libpng-config scripts as well as pkg-config data]
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[@<:@default=yes@:>@]),
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[if test "${withval}" = no; then
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binconfigs=
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AC_MSG_NOTICE([libpng-config scripts will not be built])
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AC_MSG_NOTICE([[libpng-config scripts will not be built]])
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else
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binconfigs='${binconfigs}'
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fi],
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@ -185,13 +211,15 @@ AC_SUBST([binconfigs])
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AC_SUBST([AM_CCASFLAGS], [-Wa,--noexecstack])
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AC_ARG_ENABLE([arm-neon],
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AC_HELP_STRING([--enable-arm-neon], [Enable ARM NEON optimizations]),
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[if test "${enableval}" = yes; then
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AS_HELP_STRING([[[--enable-arm-neon]]], [Enable ARM NEON optimizations]),
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[if test "${enableval}" = "yes"; then
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AC_DEFINE([PNG_ARM_NEON], [1], [Enable ARM NEON optimizations])
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AC_DEFINE([PNG_ALIGNED_MEMORY_SUPPORTED], [1], [Align row buffers])
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fi])
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AM_CONDITIONAL([PNG_ARM_NEON], [test "${enable_arm_neon:-no}" = yes])
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AC_MSG_NOTICE([[Extra options for compiler: $PNG_COPTS]])
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# Config files, substituting as above
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AC_CONFIG_FILES([Makefile libpng.pc:libpng.pc.in])
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AC_CONFIG_FILES([libpng-config:libpng-config.in],
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