268 lines
8.9 KiB
Plaintext
268 lines
8.9 KiB
Plaintext
# configure.ac
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dnl Process this file with autoconf to produce a configure script.
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dnl
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dnl Minor upgrades (compatible ABI): increment the package version
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dnl (third field in two places below) and set the PNGLIB_RELEASE
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dnl variable.
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dnl
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dnl Major upgrades (incompatible ABI): increment the package major
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dnl version (second field, or first if desired), set the minor
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dnl to 0, set PNGLIB_MAJOR below *and* follow the instructions in
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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([2.68])
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dnl Version number stuff here:
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AC_INIT([libpng],[1.6.2rc04],[png-mng-implement@lists.sourceforge.net])
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AC_CONFIG_MACRO_DIR([scripts])
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# libpng does not follow GNU file name conventions (hence 'foreign')
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# color-tests requires automake 1.11 or later
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# silent-rules requires automake 1.11 or later
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# dist-xz requires automake 1.11 or later
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# 1.12.2 fixes a security issue in 1.11.2 and 1.12.1
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# 1.13 is required for parallel tests
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AM_INIT_AUTOMAKE([1.13 foreign dist-xz color-tests silent-rules])
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# The following line causes --disable-maintainer-mode to be the default to
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# configure, this is necessary because libpng distributions cannot rely on the
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# time stamps of the autotools generated files being correct
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AM_MAINTAINER_MODE
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dnl configure.ac and Makefile.am expect automake 1.11.2 or a compatible later
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dnl version; aclocal.m4 will generate a failure if you use a prior version of
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dnl automake, so the following is not necessary (and is not defined anyway):
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dnl AM_PREREQ([1.11.2])
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dnl stop configure from automagically running automake
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PNGLIB_VERSION=1.6.2rc04
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PNGLIB_MAJOR=1
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PNGLIB_MINOR=6
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PNGLIB_RELEASE=2
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dnl End of version number stuff
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AC_CONFIG_SRCDIR([pngget.c])
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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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LT_PATH_LD
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AC_PROG_CPP
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AC_PROG_AWK
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AC_PROG_INSTALL
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AC_PROG_LN_S
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AC_PROG_MAKE_SET
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dnl libtool/libtoolize; version 2.4.2 is the tested version, this or any
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dnl compatible later version may be used
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LT_INIT([win32-dll])
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LT_PREREQ([2.4.2])
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# Some awks crash when confronted with pnglibconf.dfa, do a test run now
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# to make sure this doesn't happen
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AC_MSG_CHECKING([that AWK works])
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if ${AWK} -f ${srcdir}/scripts/options.awk out="/dev/null" version=search\
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${srcdir}/pngconf.h ${srcdir}/scripts/pnglibconf.dfa\
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${srcdir}/pngusr.dfa 1>&2
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then
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AC_MSG_RESULT([ok])
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else
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AC_MSG_FAILURE([failed], 1)
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fi
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# This is a remnant of the old cc -E validation, where it may have been
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# necessary to use a different preprocessor for .dfn files
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DFNCPP="$CPP"
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AC_SUBST(DFNCPP)
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# -Werror cannot be passed to GCC in CFLAGS because configure will fail (it
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# checks the compiler with a program that generates a warning), add the
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# following option to deal with this
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AC_ARG_VAR(PNG_COPTS,
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[additional flags for the C compiler, use this for options that would]
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[cause configure itself to fail])
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AC_ARG_ENABLE(werror,
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AS_HELP_STRING([[[--enable-werror[=OPT]]]],
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[Pass -Werror or the given argument to the compiler if it is supported]),
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[test "$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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# Checks for typedefs, structures, and compiler characteristics.
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AC_C_CONST
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AC_TYPE_SIZE_T
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AC_STRUCT_TM
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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_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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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, ${ZPREFIX}zlibVersion, , AC_MSG_ERROR(zlib not installed)))
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# The following is for pngvalid, to ensure it catches FP errors even on
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# platforms that don't enable FP exceptions, the function appears in the math
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# library (typically), it's not an error if it is not found.
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AC_CHECK_LIB([m], [feenableexcept])
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AC_CHECK_FUNCS([feenableexcept])
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AC_MSG_CHECKING([if using Solaris linker])
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SLD=`$LD --version 2>&1 | grep Solaris`
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if test "$SLD"; then
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have_solaris_ld=yes
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AC_MSG_RESULT(yes)
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else
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have_solaris_ld=no
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AC_MSG_RESULT(no)
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fi
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AM_CONDITIONAL(HAVE_SOLARIS_LD, test "$have_solaris_ld" = "yes")
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AC_MSG_CHECKING([if libraries can be versioned])
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# Special case for PE/COFF platforms: ld reports
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# support for version-script, but doesn't actually
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# DO anything with it.
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case $host in
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*cygwin* | *mingw32* | *interix* )
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have_ld_version_script=no
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AC_MSG_RESULT(no)
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;;
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* )
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if test "$have_solaris_ld" = "yes"; then
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GLD=`$LD --help < /dev/null 2>&1 | grep 'M mapfile'`
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else
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GLD=`$LD --help < /dev/null 2>/dev/null | grep version-script`
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fi
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if test "$GLD"; then
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have_ld_version_script=yes
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AC_MSG_RESULT(yes)
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else
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have_ld_version_script=no
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AC_MSG_RESULT(no)
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AC_MSG_WARN(*** You have not enabled versioned symbols.)
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fi
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;;
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esac
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AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")
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if test "$have_ld_version_script" = "yes"; then
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AC_MSG_CHECKING([for symbol prefix])
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SYMBOL_PREFIX=`echo "PREFIX=__USER_LABEL_PREFIX__" \
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| ${CPP-${CC-gcc} -E} - 2>&1 \
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| ${EGREP-grep} "^PREFIX=" \
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| ${SED-sed} -e "s:^PREFIX=::" -e "s:__USER_LABEL_PREFIX__::"`
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AC_SUBST(SYMBOL_PREFIX)
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AC_MSG_RESULT($SYMBOL_PREFIX)
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fi
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# Substitutions for .in files
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AC_SUBST(PNGLIB_VERSION)
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AC_SUBST(PNGLIB_MAJOR)
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AC_SUBST(PNGLIB_MINOR)
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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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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 ${pkgconfigdir}]])
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# Make the *-config binary config scripts optional
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AC_ARG_WITH(binconfigs,
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AS_HELP_STRING([[[--with-binconfigs]]],
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[Generate shell libpng-config scripts as well as pkg-config data]
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[@<:@default=yes@:>@]),
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[if test "${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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else
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binconfigs='${binconfigs}'
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fi],
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[binconfigs='${binconfigs}'])
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AC_SUBST([binconfigs])
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# Support for prefixes to the API function names; this will generate defines
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# at the start of the build to rename exported library functions
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AC_ARG_WITH(libpng-prefix,
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AS_HELP_STRING([[[--with-libpng-prefix]]],
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[prefix libpng exported function (API) names with the given value]),
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[if test "${withval:-no}" != "no"; then
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AC_SUBST([PNG_PREFIX], [${withval}])
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fi])
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AM_CONDITIONAL([DO_PNG_PREFIX], [test "${with_libpng_prefix:-no}" != "no"])
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# Because GCC by default assembles code with an executable stack, even though it
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# compiles C code with a non-executable stack, it is necessary to do a fixup
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# here (this may be GCC specific)
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# The following line was removed by request of gentoo distributors
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# AC_SUBST([AM_CCASFLAGS], [-Wa,--noexecstack])
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AC_ARG_ENABLE([arm-neon],
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AS_HELP_STRING([[[--enable-arm-neon]]],
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[Enable ARM NEON optimizations: =off, check, api, on:]
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[off: disable the optimizations; check: use internal checking code]
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[(deprecated and poorly supported); api: disable by default, enable by]
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[a call to png_set_option; on: turn on unconditionally. The]
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[default is 'on' if __ARM_NEON__ is defined, otherwise 'off'.]),
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[case "$enableval" in
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off)
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AC_DEFINE([PNG_NO_ARM_NEON], [],
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[Disable ARM Neon optimizations]);;
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check)
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AC_DEFINE([PNG_ARM_NEON_CHECK_SUPPORTED], [],
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[Check for ARM Neon support at run-time]);;
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api)
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AC_DEFINE([PNG_ARM_NEON_API_SUPPORTED], [],
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[Turn on ARM Neon optimizations at run-time]);;
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on)
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AC_DEFINE([PNG_ARM_NEON_SUPPORTED], [],
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[Enable ARM Neon optimizations]);;
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*)
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AC_MSG_ERROR([arm-neon: option value required (off/check/api/on)]);;
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esac])
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AM_CONDITIONAL([PNG_ARM_NEON], [test "${enable_arm_neon:-no}" != "no"])
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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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[chmod +x libpng-config])
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AC_OUTPUT
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