332 lines
12 KiB
Plaintext
332 lines
12 KiB
Plaintext
# configure.ac
|
|
|
|
# Copyright (c) 2004-2015 Glenn Randers-Pehrson
|
|
# Last changed in libpng 1.6.22 [(PENDING RELEASE)]
|
|
|
|
# This code is released under the libpng license.
|
|
# For conditions of distribution and use, see the disclaimer
|
|
# and license in png.h
|
|
|
|
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],[1.6.22beta04],[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 subdir-objects])
|
|
# 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=1.6.22beta04
|
|
PNGLIB_MAJOR=1
|
|
PNGLIB_MINOR=6
|
|
PNGLIB_RELEASE=22
|
|
|
|
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 "${with_libpng_prefix:-no}" != "no"])
|
|
|
|
# Control over what links are made for installed files. Versioned files are
|
|
# always installed, when the following options are turned on corresponding
|
|
# unversioned links are also created (normally as symbolic links):
|
|
AC_ARG_ENABLE([unversioned-links],
|
|
AS_HELP_STRING([[[--enable-unversioned-links]]],
|
|
[Installed libpng header files are placed in a versioned subdirectory]
|
|
[and installed libpng library (including DLL) files are versioned.]
|
|
[If this option is enabled unversioned links will be created pointing to]
|
|
[the corresponding installed files. If you use libpng.pc or]
|
|
[libpng-config for all builds you do not need these links, but if you]
|
|
[compile programs directly they will typically #include <png.h> and]
|
|
[link with -lpng; in that case you need the links.]
|
|
[The links can be installed manually using 'make install-header-links']
|
|
[and 'make install-library-links' and can be removed using the]
|
|
[corresponding uninstall- targets. If you do enable this option every]
|
|
[libpng 'make install' will recreate the links to point to the just]
|
|
[installed version of libpng. The default is to create the links;]
|
|
[use --disable-unversioned-links to change this]))
|
|
|
|
# The AM_CONDITIONAL test is written so that the default is enabled;
|
|
# --disable-unversioned-links must be given to turn the option off.
|
|
AM_CONDITIONAL([DO_INSTALL_LINKS],[test "$enable_unversioned_links" != "no"])
|
|
|
|
AC_ARG_ENABLE([unversioned-libpng-pc],
|
|
AS_HELP_STRING([[[--enable-unversioned-libpng-pc]]],
|
|
[Install the configuration file 'libpng.pc' as a link to the versioned]
|
|
[version. This is done by default - use --disable-unversioned-libpng-pc]
|
|
[to change this.]))
|
|
AM_CONDITIONAL([DO_INSTALL_LIBPNG_PC],
|
|
[test "$enable_unversioned_libpng_pc" != "no"])
|
|
|
|
AC_ARG_ENABLE([unversioned-libpng-config],
|
|
AS_HELP_STRING([[[--enable-unversioned-libpng-config]]],
|
|
[Install the configuration file 'libpng-config' as a link to the]
|
|
[versioned version. This is done by default - use]
|
|
[--disable-unversioned-libpng-config to change this.]))
|
|
AM_CONDITIONAL([DO_INSTALL_LIBPNG_CONFIG],
|
|
[test "$enable_unversioned_libpng_config" != "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*|aarch64*) :;;
|
|
*) 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
|