f3728100d9
prefixing This adds an API to set optimization options externally,
providing an alternative and general solution for the non-portable
run-time tests used by the ARM Neon code. It also makes those tests
compile and link on Android.
The order of settings vs options in pnglibconf.h is reversed to allow
settings to depend on options and options can now set (or override) the
defaults for settings.
267 lines
8.8 KiB
Plaintext
267 lines
8.8 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],[1.6.1beta06],[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=1.6.1beta06
|
|
PNGLIB_MAJOR=1
|
|
PNGLIB_MINOR=6
|
|
PNGLIB_RELEASE=1
|
|
|
|
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 "${with_libpng_prefix:-no}" != "no"])
|
|
|
|
# Because GCC by default assembles code with an executable stack, even though it
|
|
# compiles C code with a non-executable stack, it is necessary to do a fixup
|
|
# here (this may by GCC specific)
|
|
AC_SUBST([AM_CCASFLAGS], [-Wa,--noexecstack])
|
|
|
|
AC_ARG_ENABLE([arm-neon],
|
|
AS_HELP_STRING([[[--enable-arm-neon]]],
|
|
[Enable ARM NEON optimizations: =off, check, api, on:]
|
|
[off: disable the optimizations; check: use internal checking code]
|
|
[(deprecated and poorly supported); api: disable by default, enable by]
|
|
[a call to png_set_option; on: turn on unconditionally. The]
|
|
[default is 'on' if __ARM_NEON__ is defined, otherwise 'off'.]),
|
|
[case "$enableval" in
|
|
off)
|
|
AC_DEFINE([PNG_NO_ARM_NEON], [],
|
|
[Disable ARM Neon optimizations]);;
|
|
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]);;
|
|
on)
|
|
AC_DEFINE([PNG_ARM_NEON_SUPPORTED], [],
|
|
[Enable ARM Neon optimizations]);;
|
|
*)
|
|
AC_MSG_ERROR([arm-neon: option value required (off/check/api/on)]);;
|
|
esac])
|
|
AM_CONDITIONAL([PNG_ARM_NEON], [test "${enable_arm_neon:-no}" != "no"])
|
|
|
|
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
|