| # configure.ac |
| |
| # Copyright (c) 2018 Cosmin Truta |
| # Copyright (c) 2004-2016 Glenn Randers-Pehrson |
| |
| # 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],[1.6.36],[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=1.6.36 |
| PNGLIB_MAJOR=1 |
| PNGLIB_MINOR=6 |
| PNGLIB_RELEASE=36 |
| |
| 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],) |
| |
| # For GCC 5 the default mode for C is -std=gnu11 instead of -std=gnu89 |
| # In pngpriv.h we request just the POSIX 1003.1 and C89 APIs by defining _POSIX_SOURCE to 1 |
| # This is incompatible with the new default mode, so we test for that and force the |
| # "-std=c89" compiler option: |
| AC_MSG_CHECKING([if we need to force back C standard to C89]) |
| AC_COMPILE_IFELSE( |
| [AC_LANG_PROGRAM([ |
| [#define _POSIX_SOURCE 1] |
| [#include <stdio.h>] |
| ])], |
| AC_MSG_RESULT(no),[ |
| if test "x$GCC" != "xyes"; then |
| AC_MSG_ERROR( |
| [Forcing back to C89 is required but the flags are only known for GCC]) |
| fi |
| AC_MSG_RESULT(yes) |
| CFLAGS="$CFLAGS -std=c89" |
| ]) |
| |
| # 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([pow], , AC_CHECK_LIB(m, pow, , AC_MSG_ERROR(cannot find pow)) ) |
| |
| # Some later POSIX 1003.1 functions are required for test programs, failure here |
| # is soft (the corresponding test program is not built). |
| AC_CHECK_FUNC([clock_gettime],,[AC_MSG_WARN([not building timepng])]) |
| AM_CONDITIONAL([HAVE_CLOCK_GETTIME], [test "$ac_cv_func_clock_gettime" = "yes"]) |
| |
| AC_ARG_WITH(zlib-prefix, |
| AS_HELP_STRING([[[--with-zlib-prefix]]], |
| [prefix that may have been used in installed zlib]), |
| [ZPREFIX=${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 |
| # ===================== |
| # |
| # DEFAULT |
| # ======= |
| # |
| AC_ARG_ENABLE([hardware-optimizations], |
| AS_HELP_STRING([[[--enable-hardware-optimizations]]], |
| [Enable hardware optimizations: =no/off, yes/on:]), |
| [case "$enableval" in |
| no|off) |
| # disable hardware optimization on all systems: |
| enable_arm_neon=no |
| AC_DEFINE([PNG_ARM_NEON_OPT], [0], |
| [Disable ARM_NEON optimizations]) |
| enable_mips_msa=no |
| AC_DEFINE([PNG_MIPS_MSA_OPT], [0], |
| [Disable MIPS_MSA optimizations]) |
| enable_powerpc_vsx=no |
| AC_DEFINE([PNG_POWERPC_VSX_OPT], [0], |
| [Disable POWERPC VSX optimizations]) |
| enable_intel_sse=no |
| AC_DEFINE([PNG_INTEL_SSE_OPT], [0], |
| [Disable INTEL_SSE optimizations]) |
| ;; |
| *) |
| # allow enabling hardware optimization on any system: |
| case "$host_cpu" in |
| arm*|aarch64*) |
| enable_arm_neon=yes |
| AC_DEFINE([PNG_ARM_NEON_OPT], [0], |
| [Enable ARM_NEON optimizations]) |
| ;; |
| mipsel*|mips64el*) |
| enable_mips_msa=yes |
| AC_DEFINE([PNG_MIPS_MSA_OPT], [0], |
| [Enable MIPS_MSA optimizations]) |
| ;; |
| i?86|x86_64) |
| enable_intel_sse=yes |
| AC_DEFINE([PNG_INTEL_SSE_OPT], [1], |
| [Enable Intel SSE optimizations]) |
| ;; |
| powerpc*|ppc64*) |
| enable_powerpc_vsx=yes |
| AC_DEFINE([PNG_POWERPC_VSX_OPT], [2], |
| [Enable POWERPC VSX optimizations]) |
| ;; |
| esac |
| ;; |
| esac]) |
| |
| # 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 "$enable_arm_neon" != '';; |
| esac]) |
| |
| # MIPS |
| # === |
| # |
| # MIPS MSA (SIMD) support. |
| |
| AC_ARG_ENABLE([mips-msa], |
| AS_HELP_STRING([[[--enable-mips-msa]]], |
| [Enable MIPS MSA optimizations: =no/off, check, api, yes/on:] |
| [no/off: disable the optimizations; check: use internal checking code] |
| [(deprecated and poorly supported); api: disable by default, enable by] |
| [a call to png_set_option; yes/on: turn on unconditionally.] |
| [If not specified: determined by the compiler.]), |
| [case "$enableval" in |
| no|off) |
| # disable the default enabling on __mips_msa systems: |
| AC_DEFINE([PNG_MIPS_MSA_OPT], [0], |
| [Disable MIPS MSA optimizations]) |
| # Prevent inclusion of the assembler files below: |
| enable_mips_msa=no;; |
| check) |
| AC_DEFINE([PNG_MIPS_MSA_CHECK_SUPPORTED], [], |
| [Check for MIPS MSA support at run-time]);; |
| api) |
| AC_DEFINE([PNG_MIPS_MSA_API_SUPPORTED], [], |
| [Turn on MIPS MSA optimizations at run-time]);; |
| yes|on) |
| AC_DEFINE([PNG_MIPS_MSA_OPT], [2], |
| [Enable MIPS MSA optimizations]) |
| AC_MSG_WARN([--enable-mips-msa: please specify 'check' or 'api', if] |
| [you want the optimizations unconditionally pass '-mmsa -mfp64'] |
| [to the compiler.]);; |
| *) |
| AC_MSG_ERROR([--enable-mips-msa=${enable_mips_msa}: invalid value]) |
| esac]) |
| |
| # Add MIPS specific files to all builds where the host_cpu is mips ('mips*') or |
| # where MIPS optimizations were explicitly requested (this allows a fallback if a |
| # future host CPU does not match 'mips*') |
| |
| AM_CONDITIONAL([PNG_MIPS_MSA], |
| [test "$enable_mips_msa" != 'no' && |
| case "$host_cpu" in |
| mipsel*|mips64el*) :;; |
| esac]) |
| |
| # INTEL |
| # ===== |
| # |
| # INTEL SSE (SIMD) support. |
| |
| AC_ARG_ENABLE([intel-sse], |
| AS_HELP_STRING([[[--enable-intel-sse]]], |
| [Enable Intel SSE optimizations: =no/off, yes/on:] |
| [no/off: disable the optimizations;] |
| [yes/on: enable the optimizations.] |
| [If not specified: determined by the compiler.]), |
| [case "$enableval" in |
| no|off) |
| # disable the default enabling: |
| AC_DEFINE([PNG_INTEL_SSE_OPT], [0], |
| [Disable Intel SSE optimizations]) |
| # Prevent inclusion of the assembler files below: |
| enable_intel_sse=no;; |
| yes|on) |
| AC_DEFINE([PNG_INTEL_SSE_OPT], [1], |
| [Enable Intel SSE optimizations]);; |
| *) |
| AC_MSG_ERROR([--enable-intel-sse=${enable_intel_sse}: invalid value]) |
| esac]) |
| |
| # Add Intel specific files to all builds where the host_cpu is Intel ('x86*') |
| # or where Intel optimizations were explicitly requested (this allows a |
| # fallback if a future host CPU does not match 'x86*') |
| AM_CONDITIONAL([PNG_INTEL_SSE], |
| [test "$enable_intel_sse" != 'no' && |
| case "$host_cpu" in |
| i?86|x86_64) :;; |
| *) test "$enable_intel_sse" != '';; |
| esac]) |
| |
| # PowerPC |
| # === |
| # |
| # PowerPC VSX (SIMD) support. |
| |
| AC_ARG_ENABLE([powerpc-vsx], |
| AS_HELP_STRING([[[--enable-powerpc-vsx]]], |
| [Enable POWERPC VSX optimizations: =no/off, check, api, yes/on:] |
| [no/off: disable the optimizations; check: use internal checking code] |
| [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 "$enableval" in |
| no|off) |
| # disable the default enabling on __ppc64__ systems: |
| AC_DEFINE([PNG_POWERPC_VSX_OPT], [0], |
| [Disable POWERPC VSX optimizations]) |
| # Prevent inclusion of the platform specific files below: |
| enable_powerpc_vsx=no;; |
| check) |
| AC_DEFINE([PNG_POWERPC_VSX_CHECK_SUPPORTED], [], |
| [Check for POWERPC VSX support at run-time]) |
| AC_MSG_WARN([--enable-powerpc-vsx Please check contrib/powerpc/README file] |
| [for the list of supported OSes.]);; |
| api) |
| AC_DEFINE([PNG_POWERPC_VSX_API_SUPPORTED], [], |
| [Turn on POWERPC VSX optimizations at run-time]);; |
| yes|on) |
| AC_DEFINE([PNG_POWERPC_VSX_OPT], [2], |
| [Enable POWERPC VSX optimizations]) |
| AC_MSG_WARN([--enable-powerpc-vsx: please specify 'check' or 'api', if] |
| [you want the optimizations unconditionally pass '-maltivec -mvsx'] |
| [or '-mcpu=power8'to the compiler.]);; |
| *) |
| AC_MSG_ERROR([--enable-powerpc-vsx=${enable_powerpc_vsx}: invalid value]) |
| esac]) |
| |
| # Add PowerPC specific files to all builds where the host_cpu is powerpc('powerpc*') or |
| # where POWERPC optimizations were explicitly requested (this allows a fallback if a |
| # future host CPU does not match 'powerpc*') |
| |
| AM_CONDITIONAL([PNG_POWERPC_VSX], |
| [test "$enable_powerpc_vsx" != 'no' && |
| case "$host_cpu" in |
| powerpc*|ppc64*) :;; |
| 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 |