18dd07e3e6
pnglibconf.h, allowing more of the decisions to be made internally
(pngpriv.h) during the compile. Without this, symbol prefixing is broken
under certain circumstances on ARM platforms. Now only the API parts of
the optimizations ('check' vs 'api') are exposed in the public header files
except that the new setting PNG_ARM_NEON_OPT documents how libpng makes the
decision about whether or not to use the optimizations.
286 lines
9.3 KiB
Plaintext
286 lines
9.3 KiB
Plaintext
# configure.ac
|
|
|
|
dnl Process this file with autoconf to produce a configure script.
|
|
dnl
|
|
dnl Minor upgrades (compatible ABI): increment the package version
|
|
dnl (third field in two places below) and set the PNGLIB_RELEASE
|
|
dnl variable.
|
|
dnl
|
|
dnl Major upgrades (incompatible ABI): increment the package major
|
|
dnl version (second field, or first if desired), set the minor
|
|
dnl to 0, set PNGLIB_MAJOR below *and* follow the instructions in
|
|
dnl Makefile.am to upgrade the package name.
|
|
|
|
dnl This is here to prevent earlier autoconf from being used, it
|
|
dnl should not be necessary to regenerate configure if the time
|
|
dnl stamps are correct
|
|
AC_PREREQ([2.68])
|
|
|
|
dnl Version number stuff here:
|
|
|
|
AC_INIT([libpng],[1.6.3beta07],[png-mng-implement@lists.sourceforge.net])
|
|
AC_CONFIG_MACRO_DIR([scripts])
|
|
|
|
# libpng does not follow GNU file name conventions (hence 'foreign')
|
|
# color-tests requires automake 1.11 or later
|
|
# silent-rules requires automake 1.11 or later
|
|
# dist-xz requires automake 1.11 or later
|
|
# 1.12.2 fixes a security issue in 1.11.2 and 1.12.1
|
|
# 1.13 is required for parallel tests
|
|
AM_INIT_AUTOMAKE([1.13 foreign dist-xz color-tests silent-rules])
|
|
# The following line causes --disable-maintainer-mode to be the default to
|
|
# configure, this is necessary because libpng distributions cannot rely on the
|
|
# time stamps of the autotools generated files being correct
|
|
AM_MAINTAINER_MODE
|
|
|
|
dnl configure.ac and Makefile.am expect automake 1.11.2 or a compatible later
|
|
dnl version; aclocal.m4 will generate a failure if you use a prior version of
|
|
dnl automake, so the following is not necessary (and is not defined anyway):
|
|
dnl AM_PREREQ([1.11.2])
|
|
dnl stop configure from automagically running automake
|
|
|
|
PNGLIB_VERSION=1.6.3beta07
|
|
PNGLIB_MAJOR=1
|
|
PNGLIB_MINOR=6
|
|
PNGLIB_RELEASE=3
|
|
|
|
dnl End of version number stuff
|
|
|
|
AC_CONFIG_SRCDIR([pngget.c])
|
|
AC_CONFIG_HEADERS([config.h])
|
|
|
|
# Checks for programs.
|
|
AC_LANG([C])
|
|
AC_PROG_CC
|
|
AM_PROG_AS
|
|
LT_PATH_LD
|
|
AC_PROG_CPP
|
|
AC_PROG_AWK
|
|
AC_PROG_INSTALL
|
|
AC_PROG_LN_S
|
|
AC_PROG_MAKE_SET
|
|
|
|
dnl libtool/libtoolize; version 2.4.2 is the tested version, this or any
|
|
dnl compatible later version may be used
|
|
LT_INIT([win32-dll])
|
|
LT_PREREQ([2.4.2])
|
|
|
|
# Some awks crash when confronted with pnglibconf.dfa, do a test run now
|
|
# to make sure this doesn't happen
|
|
AC_MSG_CHECKING([that AWK works])
|
|
if ${AWK} -f ${srcdir}/scripts/options.awk out="/dev/null" version=search\
|
|
${srcdir}/pngconf.h ${srcdir}/scripts/pnglibconf.dfa\
|
|
${srcdir}/pngusr.dfa 1>&2
|
|
then
|
|
AC_MSG_RESULT([ok])
|
|
else
|
|
AC_MSG_FAILURE([failed], 1)
|
|
fi
|
|
|
|
# This is a remnant of the old cc -E validation, where it may have been
|
|
# necessary to use a different preprocessor for .dfn files
|
|
DFNCPP="$CPP"
|
|
AC_SUBST(DFNCPP)
|
|
|
|
# -Werror cannot be passed to GCC in CFLAGS because configure will fail (it
|
|
# checks the compiler with a program that generates a warning), add the
|
|
# following option to deal with this
|
|
AC_ARG_VAR(PNG_COPTS,
|
|
[additional flags for the C compiler, use this for options that would]
|
|
[cause configure itself to fail])
|
|
AC_ARG_ENABLE(werror,
|
|
AS_HELP_STRING([[[--enable-werror[=OPT]]]],
|
|
[Pass -Werror or the given argument to the compiler if it is supported]),
|
|
[test "$enable_werror" = "yes" && enable_werror="-Werror"
|
|
if test "$enable_werror" != "no"; then
|
|
sav_CFLAGS="$CFLAGS"
|
|
CFLAGS="$enable_werror $CFLAGS"
|
|
AC_MSG_CHECKING([if the compiler allows $enable_werror])
|
|
AC_COMPILE_IFELSE(
|
|
[AC_LANG_SOURCE([
|
|
[int main(int argc, char **argv){]
|
|
[return argv[argc-1][0];]
|
|
[}]])],
|
|
AC_MSG_RESULT(yes)
|
|
PNG_COPTS="$PNG_COPTS $enable_werror",
|
|
AC_MSG_RESULT(no))
|
|
CFLAGS="$sav_CFLAGS"
|
|
fi],)
|
|
|
|
# Checks for header files.
|
|
AC_HEADER_STDC
|
|
|
|
# Checks for typedefs, structures, and compiler characteristics.
|
|
AC_C_CONST
|
|
AC_TYPE_SIZE_T
|
|
AC_STRUCT_TM
|
|
AC_C_RESTRICT
|
|
|
|
# Checks for library functions.
|
|
AC_FUNC_STRTOD
|
|
AC_CHECK_FUNCS([memset], , AC_MSG_ERROR(memset not found in libc))
|
|
AC_CHECK_FUNCS([pow], , AC_CHECK_LIB(m, pow, , AC_MSG_ERROR(cannot find pow)) )
|
|
AC_ARG_WITH(zlib-prefix,
|
|
AS_HELP_STRING([[[--with-zlib-prefix]]],
|
|
[prefix that may have been used in installed zlib]),
|
|
[ZPREFIX=${withval}],
|
|
[ZPREFIX='z_'])
|
|
AC_CHECK_LIB(z, zlibVersion, ,
|
|
AC_CHECK_LIB(z, ${ZPREFIX}zlibVersion, , AC_MSG_ERROR(zlib not installed)))
|
|
|
|
# The following is for pngvalid, to ensure it catches FP errors even on
|
|
# platforms that don't enable FP exceptions, the function appears in the math
|
|
# library (typically), it's not an error if it is not found.
|
|
AC_CHECK_LIB([m], [feenableexcept])
|
|
AC_CHECK_FUNCS([feenableexcept])
|
|
|
|
AC_MSG_CHECKING([if using Solaris linker])
|
|
SLD=`$LD --version 2>&1 | grep Solaris`
|
|
if test "$SLD"; then
|
|
have_solaris_ld=yes
|
|
AC_MSG_RESULT(yes)
|
|
else
|
|
have_solaris_ld=no
|
|
AC_MSG_RESULT(no)
|
|
fi
|
|
AM_CONDITIONAL(HAVE_SOLARIS_LD, test "$have_solaris_ld" = "yes")
|
|
|
|
AC_MSG_CHECKING([if libraries can be versioned])
|
|
# Special case for PE/COFF platforms: ld reports
|
|
# support for version-script, but doesn't actually
|
|
# DO anything with it.
|
|
case $host in
|
|
*cygwin* | *mingw32* | *interix* )
|
|
have_ld_version_script=no
|
|
AC_MSG_RESULT(no)
|
|
;;
|
|
* )
|
|
|
|
if test "$have_solaris_ld" = "yes"; then
|
|
GLD=`$LD --help < /dev/null 2>&1 | grep 'M mapfile'`
|
|
else
|
|
GLD=`$LD --help < /dev/null 2>/dev/null | grep version-script`
|
|
fi
|
|
|
|
if test "$GLD"; then
|
|
have_ld_version_script=yes
|
|
AC_MSG_RESULT(yes)
|
|
else
|
|
have_ld_version_script=no
|
|
AC_MSG_RESULT(no)
|
|
AC_MSG_WARN(*** You have not enabled versioned symbols.)
|
|
fi
|
|
;;
|
|
esac
|
|
|
|
AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")
|
|
|
|
if test "$have_ld_version_script" = "yes"; then
|
|
AC_MSG_CHECKING([for symbol prefix])
|
|
SYMBOL_PREFIX=`echo "PREFIX=__USER_LABEL_PREFIX__" \
|
|
| ${CPP-${CC-gcc} -E} - 2>&1 \
|
|
| ${EGREP-grep} "^PREFIX=" \
|
|
| ${SED-sed} -e "s:^PREFIX=::" -e "s:__USER_LABEL_PREFIX__::"`
|
|
AC_SUBST(SYMBOL_PREFIX)
|
|
AC_MSG_RESULT($SYMBOL_PREFIX)
|
|
fi
|
|
|
|
# Substitutions for .in files
|
|
AC_SUBST(PNGLIB_VERSION)
|
|
AC_SUBST(PNGLIB_MAJOR)
|
|
AC_SUBST(PNGLIB_MINOR)
|
|
AC_SUBST(PNGLIB_RELEASE)
|
|
|
|
# Additional arguments (and substitutions)
|
|
# Allow the pkg-config directory to be set
|
|
AC_ARG_WITH(pkgconfigdir,
|
|
AS_HELP_STRING([[[--with-pkgconfigdir]]],
|
|
[Use the specified pkgconfig dir (default is libdir/pkgconfig)]),
|
|
[pkgconfigdir=${withval}],
|
|
[pkgconfigdir='${libdir}/pkgconfig'])
|
|
|
|
AC_SUBST([pkgconfigdir])
|
|
AC_MSG_NOTICE([[pkgconfig directory is ${pkgconfigdir}]])
|
|
|
|
# Make the *-config binary config scripts optional
|
|
AC_ARG_WITH(binconfigs,
|
|
AS_HELP_STRING([[[--with-binconfigs]]],
|
|
[Generate shell libpng-config scripts as well as pkg-config data]
|
|
[@<:@default=yes@:>@]),
|
|
[if test "${withval}" = no; then
|
|
binconfigs=
|
|
AC_MSG_NOTICE([[libpng-config scripts will not be built]])
|
|
else
|
|
binconfigs='${binconfigs}'
|
|
fi],
|
|
[binconfigs='${binconfigs}'])
|
|
AC_SUBST([binconfigs])
|
|
|
|
# Support for prefixes to the API function names; this will generate defines
|
|
# at the start of the build to rename exported library functions
|
|
AC_ARG_WITH(libpng-prefix,
|
|
AS_HELP_STRING([[[--with-libpng-prefix]]],
|
|
[prefix libpng exported function (API) names with the given value]),
|
|
[if test "${withval:-no}" != "no"; then
|
|
AC_SUBST([PNG_PREFIX], [${withval}])
|
|
fi])
|
|
AM_CONDITIONAL([DO_PNG_PREFIX], [test "${with_libpng_prefix:-no}" != "no"])
|
|
|
|
# HOST SPECIFIC OPTIONS
|
|
# =====================
|
|
#
|
|
# ARM
|
|
# ===
|
|
#
|
|
# ARM NEON (SIMD) support.
|
|
|
|
AC_ARG_ENABLE([arm-neon],
|
|
AS_HELP_STRING([[[--enable-arm-neon]]],
|
|
[Enable ARM NEON optimizations: =no/off, check, api, yes/on:]
|
|
[no/off: disable the optimizations; check: use internal checking code]
|
|
[(deprecated and poorly supported); api: disable by default, enable by]
|
|
[a call to png_set_option; yes/on: turn on unconditionally.]
|
|
[If not specified: determined by the compiler.]),
|
|
[case "$enableval" in
|
|
no|off)
|
|
# disable the default enabling on __ARM_NEON__ systems:
|
|
AC_DEFINE([PNG_ARM_NEON_OPT], [0],
|
|
[Disable ARM Neon optimizations])
|
|
# Prevent inclusion of the assembler files below:
|
|
enable_arm_neon=no;;
|
|
check)
|
|
AC_DEFINE([PNG_ARM_NEON_CHECK_SUPPORTED], [],
|
|
[Check for ARM Neon support at run-time]);;
|
|
api)
|
|
AC_DEFINE([PNG_ARM_NEON_API_SUPPORTED], [],
|
|
[Turn on ARM Neon optimizations at run-time]);;
|
|
yes|on)
|
|
AC_DEFINE([PNG_ARM_NEON_OPT], [2],
|
|
[Enable ARM Neon optimizations])
|
|
AC_MSG_WARN([--enable-arm-neon: please specify 'check' or 'api', if]
|
|
[you want the optimizations unconditionally pass -mfpu=neon]
|
|
[to the compiler.]);;
|
|
*)
|
|
AC_MSG_ERROR([--enable-arm-neon=${enable_arm_neon}: invalid value])
|
|
esac])
|
|
|
|
# Add ARM specific files to all builds where the host_cpu is arm ('arm*') or
|
|
# where ARM optimizations were explicitly requested (this allows a fallback if a
|
|
# future host CPU does not match 'arm*')
|
|
|
|
AM_CONDITIONAL([PNG_ARM_NEON],
|
|
[test "$enable_arm_neon" != 'no' &&
|
|
case "$host_cpu" in
|
|
arm*) :;;
|
|
*) test "$enable_arm_neon" != '';;
|
|
esac])
|
|
|
|
AC_MSG_NOTICE([[Extra options for compiler: $PNG_COPTS]])
|
|
|
|
# Config files, substituting as above
|
|
AC_CONFIG_FILES([Makefile libpng.pc:libpng.pc.in])
|
|
AC_CONFIG_FILES([libpng-config:libpng-config.in],
|
|
[chmod +x libpng-config])
|
|
|
|
AC_OUTPUT
|