diff options
Diffstat (limited to 'Build/source/libs/libpng/libpng-1.6.9/configure.ac')
| -rw-r--r-- | Build/source/libs/libpng/libpng-1.6.9/configure.ac | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/Build/source/libs/libpng/libpng-1.6.9/configure.ac b/Build/source/libs/libpng/libpng-1.6.9/configure.ac new file mode 100644 index 00000000000..8061aba60f1 --- /dev/null +++ b/Build/source/libs/libpng/libpng-1.6.9/configure.ac @@ -0,0 +1,324 @@ +# 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],[1.6.9],[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=1.6.9 +PNGLIB_MAJOR=1 +PNGLIB_MINOR=6 +PNGLIB_RELEASE=9 + +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*) :;; + *) 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 |