| 1 | # configure.ac
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| 2 |
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| 3 | # Copyright (c) 2018 Cosmin Truta
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| 4 | # Copyright (c) 2004-2016 Glenn Randers-Pehrson
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| 5 |
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| 6 | # This code is released under the libpng license.
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| 7 | # For conditions of distribution and use, see the disclaimer
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| 8 | # and license in png.h
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| 9 |
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| 10 | dnl Process this file with autoconf to produce a configure script.
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| 11 | dnl
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| 12 | dnl Minor upgrades (compatible ABI): increment the package version
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| 13 | dnl (third field in two places below) and set the PNGLIB_RELEASE
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| 14 | dnl variable.
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| 15 | dnl
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| 16 | dnl Major upgrades (incompatible ABI): increment the package major
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| 17 | dnl version (second field, or first if desired), set the minor
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| 18 | dnl to 0, set PNGLIB_MAJOR below *and* follow the instructions in
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| 19 | dnl Makefile.am to upgrade the package name.
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| 20 |
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| 21 | dnl This is here to prevent earlier autoconf from being used, it
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| 22 | dnl should not be necessary to regenerate configure if the time
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| 23 | dnl stamps are correct
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| 24 | AC_PREREQ([2.68])
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| 25 |
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| 26 | dnl Version number stuff here:
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| 27 |
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| 28 | AC_INIT([libpng],[1.6.36],[png-mng-implement@lists.sourceforge.net])
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| 29 | AC_CONFIG_MACRO_DIR([scripts])
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| 30 |
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| 31 | # libpng does not follow GNU file name conventions (hence 'foreign')
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| 32 | # color-tests requires automake 1.11 or later
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| 33 | # silent-rules requires automake 1.11 or later
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| 34 | # dist-xz requires automake 1.11 or later
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| 35 | # 1.12.2 fixes a security issue in 1.11.2 and 1.12.1
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| 36 | # 1.13 is required for parallel tests
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| 37 | AM_INIT_AUTOMAKE([1.13 foreign dist-xz color-tests silent-rules subdir-objects])
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| 38 | # The following line causes --disable-maintainer-mode to be the default to
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| 39 | # configure. This is necessary because libpng distributions cannot rely on the
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| 40 | # time stamps of the autotools generated files being correct
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| 41 | AM_MAINTAINER_MODE
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| 42 |
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| 43 | dnl configure.ac and Makefile.am expect automake 1.11.2 or a compatible later
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| 44 | dnl version; aclocal.m4 will generate a failure if you use a prior version of
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| 45 | dnl automake, so the following is not necessary (and is not defined anyway):
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| 46 | dnl AM_PREREQ([1.11.2])
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| 47 | dnl stop configure from automagically running automake
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| 48 |
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| 49 | PNGLIB_VERSION=1.6.36
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| 50 | PNGLIB_MAJOR=1
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| 51 | PNGLIB_MINOR=6
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| 52 | PNGLIB_RELEASE=36
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| 53 |
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| 54 | dnl End of version number stuff
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| 55 |
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| 56 | AC_CONFIG_SRCDIR([pngget.c])
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| 57 | AC_CONFIG_HEADERS([config.h])
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| 58 |
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| 59 | # Checks for programs.
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| 60 | AC_LANG([C])
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| 61 | AC_PROG_CC
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| 62 | AM_PROG_AS
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| 63 | LT_PATH_LD
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| 64 | AC_PROG_CPP
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| 65 | AC_PROG_AWK
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| 66 | AC_PROG_INSTALL
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| 67 | AC_PROG_LN_S
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| 68 | AC_PROG_MAKE_SET
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| 69 |
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| 70 | dnl libtool/libtoolize; version 2.4.2 is the tested version. This or any
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| 71 | dnl compatible later version may be used
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| 72 | LT_INIT([win32-dll])
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| 73 | LT_PREREQ([2.4.2])
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| 74 |
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| 75 | # Some awks crash when confronted with pnglibconf.dfa, do a test run now
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| 76 | # to make sure this doesn't happen
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| 77 | AC_MSG_CHECKING([that AWK works])
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| 78 | if ${AWK} -f ${srcdir}/scripts/options.awk out="/dev/null" version=search\
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| 79 | ${srcdir}/pngconf.h ${srcdir}/scripts/pnglibconf.dfa\
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| 80 | ${srcdir}/pngusr.dfa 1>&2
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| 81 | then
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| 82 | AC_MSG_RESULT([ok])
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| 83 | else
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| 84 | AC_MSG_FAILURE([failed], 1)
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| 85 | fi
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| 86 |
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| 87 | # This is a remnant of the old cc -E validation, where it may have been
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| 88 | # necessary to use a different preprocessor for .dfn files
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| 89 | DFNCPP="$CPP"
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| 90 | AC_SUBST(DFNCPP)
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| 91 |
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| 92 | # -Werror cannot be passed to GCC in CFLAGS because configure will fail (it
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| 93 | # checks the compiler with a program that generates a warning), add the
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| 94 | # following option to deal with this
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| 95 | AC_ARG_VAR(PNG_COPTS,
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| 96 | [additional flags for the C compiler, use this for options that would]
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| 97 | [cause configure itself to fail])
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| 98 | AC_ARG_ENABLE(werror,
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| 99 | AS_HELP_STRING([[[--enable-werror[=OPT]]]],
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| 100 | [Pass -Werror or the given argument to the compiler if it is supported]),
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| 101 | [test "$enable_werror" = "yes" && enable_werror="-Werror"
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| 102 | if test "$enable_werror" != "no"; then
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| 103 | sav_CFLAGS="$CFLAGS"
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| 104 | CFLAGS="$enable_werror $CFLAGS"
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| 105 | AC_MSG_CHECKING([if the compiler allows $enable_werror])
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| 106 | AC_COMPILE_IFELSE(
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| 107 | [AC_LANG_SOURCE([
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| 108 | [int main(int argc, char **argv){]
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| 109 | [return argv[argc-1][0];]
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| 110 | [}]])],
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| 111 | AC_MSG_RESULT(yes)
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| 112 | PNG_COPTS="$PNG_COPTS $enable_werror",
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| 113 | AC_MSG_RESULT(no))
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| 114 | CFLAGS="$sav_CFLAGS"
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| 115 | fi],)
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| 116 |
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| 117 | # For GCC 5 the default mode for C is -std=gnu11 instead of -std=gnu89
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| 118 | # In pngpriv.h we request just the POSIX 1003.1 and C89 APIs by defining _POSIX_SOURCE to 1
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| 119 | # This is incompatible with the new default mode, so we test for that and force the
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| 120 | # "-std=c89" compiler option:
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| 121 | AC_MSG_CHECKING([if we need to force back C standard to C89])
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| 122 | AC_COMPILE_IFELSE(
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| 123 | [AC_LANG_PROGRAM([
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| 124 | [#define _POSIX_SOURCE 1]
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| 125 | [#include <stdio.h>]
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| 126 | ])],
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| 127 | AC_MSG_RESULT(no),[
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| 128 | if test "x$GCC" != "xyes"; then
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| 129 | AC_MSG_ERROR(
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| 130 | [Forcing back to C89 is required but the flags are only known for GCC])
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| 131 | fi
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| 132 | AC_MSG_RESULT(yes)
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| 133 | CFLAGS="$CFLAGS -std=c89"
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| 134 | ])
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| 135 |
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| 136 | # Checks for header files.
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| 137 | AC_HEADER_STDC
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| 138 |
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| 139 | # Checks for typedefs, structures, and compiler characteristics.
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| 140 | AC_C_CONST
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| 141 | AC_TYPE_SIZE_T
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| 142 | AC_STRUCT_TM
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| 143 | AC_C_RESTRICT
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| 144 |
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| 145 | # Checks for library functions.
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| 146 | AC_FUNC_STRTOD
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| 147 | AC_CHECK_FUNCS([pow], , AC_CHECK_LIB(m, pow, , AC_MSG_ERROR(cannot find pow)) )
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| 148 |
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| 149 | # Some later POSIX 1003.1 functions are required for test programs, failure here
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| 150 | # is soft (the corresponding test program is not built).
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| 151 | AC_CHECK_FUNC([clock_gettime],,[AC_MSG_WARN([not building timepng])])
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| 152 | AM_CONDITIONAL([HAVE_CLOCK_GETTIME], [test "$ac_cv_func_clock_gettime" = "yes"])
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| 153 |
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| 154 | AC_ARG_WITH(zlib-prefix,
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| 155 | AS_HELP_STRING([[[--with-zlib-prefix]]],
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| 156 | [prefix that may have been used in installed zlib]),
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| 157 | [ZPREFIX=${withval}],
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| 158 | [ZPREFIX='z_'])
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| 159 | AC_CHECK_LIB(z, zlibVersion, ,
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| 160 | AC_CHECK_LIB(z, ${ZPREFIX}zlibVersion, , AC_MSG_ERROR(zlib not installed)))
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| 161 |
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| 162 | # The following is for pngvalid, to ensure it catches FP errors even on
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| 163 | # platforms that don't enable FP exceptions, the function appears in the math
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| 164 | # library (typically), it's not an error if it is not found.
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| 165 | AC_CHECK_LIB([m], [feenableexcept])
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| 166 | AC_CHECK_FUNCS([feenableexcept])
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| 167 |
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| 168 | AC_MSG_CHECKING([if using Solaris linker])
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| 169 | SLD=`$LD --version 2>&1 | grep Solaris`
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| 170 | if test "$SLD"; then
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| 171 | have_solaris_ld=yes
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| 172 | AC_MSG_RESULT(yes)
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| 173 | else
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| 174 | have_solaris_ld=no
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| 175 | AC_MSG_RESULT(no)
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| 176 | fi
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| 177 | AM_CONDITIONAL(HAVE_SOLARIS_LD, test "$have_solaris_ld" = "yes")
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| 178 |
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| 179 | AC_MSG_CHECKING([if libraries can be versioned])
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| 180 | # Special case for PE/COFF platforms: ld reports
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| 181 | # support for version-script, but doesn't actually
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| 182 | # DO anything with it.
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| 183 | case $host in
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| 184 | *cygwin* | *mingw32* | *interix* )
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| 185 | have_ld_version_script=no
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| 186 | AC_MSG_RESULT(no)
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| 187 | ;;
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| 188 | * )
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| 189 |
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| 190 | if test "$have_solaris_ld" = "yes"; then
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| 191 | GLD=`$LD --help < /dev/null 2>&1 | grep 'M mapfile'`
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| 192 | else
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| 193 | GLD=`$LD --help < /dev/null 2>/dev/null | grep version-script`
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| 194 | fi
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| 195 |
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| 196 | if test "$GLD"; then
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| 197 | have_ld_version_script=yes
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| 198 | AC_MSG_RESULT(yes)
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| 199 | else
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| 200 | have_ld_version_script=no
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| 201 | AC_MSG_RESULT(no)
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| 202 | AC_MSG_WARN(*** You have not enabled versioned symbols.)
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| 203 | fi
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| 204 | ;;
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| 205 | esac
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| 206 |
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| 207 | AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")
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| 208 |
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| 209 | if test "$have_ld_version_script" = "yes"; then
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| 210 | AC_MSG_CHECKING([for symbol prefix])
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| 211 | SYMBOL_PREFIX=`echo "PREFIX=__USER_LABEL_PREFIX__" \
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| 212 | | ${CPP-${CC-gcc} -E} - 2>&1 \
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| 213 | | ${EGREP-grep} "^PREFIX=" \
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| 214 | | ${SED-sed} -e "s:^PREFIX=::" -e "s:__USER_LABEL_PREFIX__::"`
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| 215 | AC_SUBST(SYMBOL_PREFIX)
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| 216 | AC_MSG_RESULT($SYMBOL_PREFIX)
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| 217 | fi
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| 218 |
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| 219 | # Substitutions for .in files
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| 220 | AC_SUBST(PNGLIB_VERSION)
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| 221 | AC_SUBST(PNGLIB_MAJOR)
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| 222 | AC_SUBST(PNGLIB_MINOR)
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| 223 | AC_SUBST(PNGLIB_RELEASE)
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| 224 |
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| 225 | # Additional arguments (and substitutions)
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| 226 | # Allow the pkg-config directory to be set
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| 227 | AC_ARG_WITH(pkgconfigdir,
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| 228 | AS_HELP_STRING([[[--with-pkgconfigdir]]],
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| 229 | [Use the specified pkgconfig dir (default is libdir/pkgconfig)]),
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| 230 | [pkgconfigdir=${withval}],
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| 231 | [pkgconfigdir='${libdir}/pkgconfig'])
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| 232 |
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| 233 | AC_SUBST([pkgconfigdir])
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| 234 | AC_MSG_NOTICE([[pkgconfig directory is ${pkgconfigdir}]])
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| 235 |
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| 236 | # Make the *-config binary config scripts optional
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| 237 | AC_ARG_WITH(binconfigs,
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| 238 | AS_HELP_STRING([[[--with-binconfigs]]],
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| 239 | [Generate shell libpng-config scripts as well as pkg-config data]
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| 240 | [@<:@default=yes@:>@]),
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| 241 | [if test "${withval}" = no; then
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| 242 | binconfigs=
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| 243 | AC_MSG_NOTICE([[libpng-config scripts will not be built]])
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| 244 | else
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| 245 | binconfigs='${binconfigs}'
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| 246 | fi],
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| 247 | [binconfigs='${binconfigs}'])
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| 248 | AC_SUBST([binconfigs])
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| 249 |
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| 250 | # Support for prefixes to the API function names; this will generate defines
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| 251 | # at the start of the build to rename exported library functions
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| 252 | AC_ARG_WITH(libpng-prefix,
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| 253 | AS_HELP_STRING([[[--with-libpng-prefix]]],
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| 254 | [prefix libpng exported function (API) names with the given value]),
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| 255 | [if test "${withval:-no}" != "no"; then
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| 256 | AC_SUBST([PNG_PREFIX], [${withval}])
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| 257 | fi])
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| 258 | AM_CONDITIONAL([DO_PNG_PREFIX], [test "${with_libpng_prefix:-no}" != "no"])
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| 259 |
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| 260 | # Control over what links are made for installed files. Versioned files are
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| 261 | # always installed, when the following options are turned on corresponding
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| 262 | # unversioned links are also created (normally as symbolic links):
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| 263 | AC_ARG_ENABLE([unversioned-links],
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| 264 | AS_HELP_STRING([[[--enable-unversioned-links]]],
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| 265 | [Installed libpng header files are placed in a versioned subdirectory]
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| 266 | [and installed libpng library (including DLL) files are versioned.]
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| 267 | [If this option is enabled unversioned links will be created pointing to]
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| 268 | [the corresponding installed files. If you use libpng.pc or]
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| 269 | [libpng-config for all builds you do not need these links, but if you]
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| 270 | [compile programs directly they will typically #include <png.h> and]
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| 271 | [link with -lpng; in that case you need the links.]
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| 272 | [The links can be installed manually using 'make install-header-links']
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| 273 | [and 'make install-library-links' and can be removed using the]
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| 274 | [corresponding uninstall- targets. If you do enable this option every]
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| 275 | [libpng 'make install' will recreate the links to point to the just]
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| 276 | [installed version of libpng. The default is to create the links;]
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| 277 | [use --disable-unversioned-links to change this]))
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| 278 |
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| 279 | # The AM_CONDITIONAL test is written so that the default is enabled;
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| 280 | # --disable-unversioned-links must be given to turn the option off.
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| 281 | AM_CONDITIONAL([DO_INSTALL_LINKS],[test "$enable_unversioned_links" != "no"])
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| 282 |
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| 283 | AC_ARG_ENABLE([unversioned-libpng-pc],
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| 284 | AS_HELP_STRING([[[--enable-unversioned-libpng-pc]]],
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| 285 | [Install the configuration file 'libpng.pc' as a link to the versioned]
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| 286 | [version. This is done by default - use --disable-unversioned-libpng-pc]
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| 287 | [to change this.]))
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| 288 | AM_CONDITIONAL([DO_INSTALL_LIBPNG_PC],
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| 289 | [test "$enable_unversioned_libpng_pc" != "no"])
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| 290 |
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| 291 | AC_ARG_ENABLE([unversioned-libpng-config],
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| 292 | AS_HELP_STRING([[[--enable-unversioned-libpng-config]]],
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| 293 | [Install the configuration file 'libpng-config' as a link to the]
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| 294 | [versioned version. This is done by default - use]
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| 295 | [--disable-unversioned-libpng-config to change this.]))
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| 296 | AM_CONDITIONAL([DO_INSTALL_LIBPNG_CONFIG],
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| 297 | [test "$enable_unversioned_libpng_config" != "no"])
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| 298 |
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| 299 | # HOST SPECIFIC OPTIONS
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| 300 | # =====================
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| 301 | #
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| 302 | # DEFAULT
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| 303 | # =======
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| 304 | #
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| 305 | AC_ARG_ENABLE([hardware-optimizations],
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| 306 | AS_HELP_STRING([[[--enable-hardware-optimizations]]],
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| 307 | [Enable hardware optimizations: =no/off, yes/on:]),
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| 308 | [case "$enableval" in
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| 309 | no|off)
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| 310 | # disable hardware optimization on all systems:
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| 311 | enable_arm_neon=no
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| 312 | AC_DEFINE([PNG_ARM_NEON_OPT], [0],
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| 313 | [Disable ARM_NEON optimizations])
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| 314 | enable_mips_msa=no
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| 315 | AC_DEFINE([PNG_MIPS_MSA_OPT], [0],
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| 316 | [Disable MIPS_MSA optimizations])
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| 317 | enable_powerpc_vsx=no
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| 318 | AC_DEFINE([PNG_POWERPC_VSX_OPT], [0],
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| 319 | [Disable POWERPC VSX optimizations])
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| 320 | enable_intel_sse=no
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| 321 | AC_DEFINE([PNG_INTEL_SSE_OPT], [0],
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| 322 | [Disable INTEL_SSE optimizations])
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| 323 | ;;
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| 324 | *)
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| 325 | # allow enabling hardware optimization on any system:
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| 326 | case "$host_cpu" in
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| 327 | arm*|aarch64*)
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| 328 | enable_arm_neon=yes
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| 329 | AC_DEFINE([PNG_ARM_NEON_OPT], [0],
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| 330 | [Enable ARM_NEON optimizations])
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| 331 | ;;
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| 332 | mipsel*|mips64el*)
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| 333 | enable_mips_msa=yes
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| 334 | AC_DEFINE([PNG_MIPS_MSA_OPT], [0],
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| 335 | [Enable MIPS_MSA optimizations])
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| 336 | ;;
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| 337 | i?86|x86_64)
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| 338 | enable_intel_sse=yes
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| 339 | AC_DEFINE([PNG_INTEL_SSE_OPT], [1],
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| 340 | [Enable Intel SSE optimizations])
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| 341 | ;;
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| 342 | powerpc*|ppc64*)
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| 343 | enable_powerpc_vsx=yes
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| 344 | AC_DEFINE([PNG_POWERPC_VSX_OPT], [2],
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| 345 | [Enable POWERPC VSX optimizations])
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| 346 | ;;
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| 347 | esac
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| 348 | ;;
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| 349 | esac])
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| 350 |
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| 351 | # ARM
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| 352 | # ===
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| 353 | #
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| 354 | # ARM NEON (SIMD) support.
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| 355 |
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| 356 | AC_ARG_ENABLE([arm-neon],
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| 357 | AS_HELP_STRING([[[--enable-arm-neon]]],
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| 358 | [Enable ARM NEON optimizations: =no/off, check, api, yes/on:]
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| 359 | [no/off: disable the optimizations; check: use internal checking code]
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| 360 | [(deprecated and poorly supported); api: disable by default, enable by]
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| 361 | [a call to png_set_option; yes/on: turn on unconditionally.]
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| 362 | [If not specified: determined by the compiler.]),
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| 363 | [case "$enableval" in
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| 364 | no|off)
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| 365 | # disable the default enabling on __ARM_NEON__ systems:
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| 366 | AC_DEFINE([PNG_ARM_NEON_OPT], [0],
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| 367 | [Disable ARM Neon optimizations])
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| 368 | # Prevent inclusion of the assembler files below:
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| 369 | enable_arm_neon=no;;
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| 370 | check)
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| 371 | AC_DEFINE([PNG_ARM_NEON_CHECK_SUPPORTED], [],
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| 372 | [Check for ARM Neon support at run-time]);;
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| 373 | api)
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| 374 | AC_DEFINE([PNG_ARM_NEON_API_SUPPORTED], [],
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| 375 | [Turn on ARM Neon optimizations at run-time]);;
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| 376 | yes|on)
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| 377 | AC_DEFINE([PNG_ARM_NEON_OPT], [2],
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| 378 | [Enable ARM Neon optimizations])
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| 379 | AC_MSG_WARN([--enable-arm-neon: please specify 'check' or 'api', if]
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| 380 | [you want the optimizations unconditionally pass -mfpu=neon]
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| 381 | [to the compiler.]);;
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| 382 | *)
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| 383 | AC_MSG_ERROR([--enable-arm-neon=${enable_arm_neon}: invalid value])
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| 384 | esac])
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| 385 |
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| 386 | # Add ARM specific files to all builds where the host_cpu is arm ('arm*') or
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| 387 | # where ARM optimizations were explicitly requested (this allows a fallback if a
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| 388 | # future host CPU does not match 'arm*')
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| 389 |
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| 390 | AM_CONDITIONAL([PNG_ARM_NEON],
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| 391 | [test "$enable_arm_neon" != 'no' &&
|
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| 392 | case "$host_cpu" in
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| 393 | arm*|aarch64*) :;;
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| 394 | *) test "$enable_arm_neon" != '';;
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| 395 | esac])
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| 396 |
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| 397 | # MIPS
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| 398 | # ===
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| 399 | #
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| 400 | # MIPS MSA (SIMD) support.
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| 401 |
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| 402 | AC_ARG_ENABLE([mips-msa],
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| 403 | AS_HELP_STRING([[[--enable-mips-msa]]],
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| 404 | [Enable MIPS MSA optimizations: =no/off, check, api, yes/on:]
|
|---|
| 405 | [no/off: disable the optimizations; check: use internal checking code]
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|---|
| 406 | [(deprecated and poorly supported); api: disable by default, enable by]
|
|---|
| 407 | [a call to png_set_option; yes/on: turn on unconditionally.]
|
|---|
| 408 | [If not specified: determined by the compiler.]),
|
|---|
| 409 | [case "$enableval" in
|
|---|
| 410 | no|off)
|
|---|
| 411 | # disable the default enabling on __mips_msa systems:
|
|---|
| 412 | AC_DEFINE([PNG_MIPS_MSA_OPT], [0],
|
|---|
| 413 | [Disable MIPS MSA optimizations])
|
|---|
| 414 | # Prevent inclusion of the assembler files below:
|
|---|
| 415 | enable_mips_msa=no;;
|
|---|
| 416 | check)
|
|---|
| 417 | AC_DEFINE([PNG_MIPS_MSA_CHECK_SUPPORTED], [],
|
|---|
| 418 | [Check for MIPS MSA support at run-time]);;
|
|---|
| 419 | api)
|
|---|
| 420 | AC_DEFINE([PNG_MIPS_MSA_API_SUPPORTED], [],
|
|---|
| 421 | [Turn on MIPS MSA optimizations at run-time]);;
|
|---|
| 422 | yes|on)
|
|---|
| 423 | AC_DEFINE([PNG_MIPS_MSA_OPT], [2],
|
|---|
| 424 | [Enable MIPS MSA optimizations])
|
|---|
| 425 | AC_MSG_WARN([--enable-mips-msa: please specify 'check' or 'api', if]
|
|---|
| 426 | [you want the optimizations unconditionally pass '-mmsa -mfp64']
|
|---|
| 427 | [to the compiler.]);;
|
|---|
| 428 | *)
|
|---|
| 429 | AC_MSG_ERROR([--enable-mips-msa=${enable_mips_msa}: invalid value])
|
|---|
| 430 | esac])
|
|---|
| 431 |
|
|---|
| 432 | # Add MIPS specific files to all builds where the host_cpu is mips ('mips*') or
|
|---|
| 433 | # where MIPS optimizations were explicitly requested (this allows a fallback if a
|
|---|
| 434 | # future host CPU does not match 'mips*')
|
|---|
| 435 |
|
|---|
| 436 | AM_CONDITIONAL([PNG_MIPS_MSA],
|
|---|
| 437 | [test "$enable_mips_msa" != 'no' &&
|
|---|
| 438 | case "$host_cpu" in
|
|---|
| 439 | mipsel*|mips64el*) :;;
|
|---|
| 440 | esac])
|
|---|
| 441 |
|
|---|
| 442 | # INTEL
|
|---|
| 443 | # =====
|
|---|
| 444 | #
|
|---|
| 445 | # INTEL SSE (SIMD) support.
|
|---|
| 446 |
|
|---|
| 447 | AC_ARG_ENABLE([intel-sse],
|
|---|
| 448 | AS_HELP_STRING([[[--enable-intel-sse]]],
|
|---|
| 449 | [Enable Intel SSE optimizations: =no/off, yes/on:]
|
|---|
| 450 | [no/off: disable the optimizations;]
|
|---|
| 451 | [yes/on: enable the optimizations.]
|
|---|
| 452 | [If not specified: determined by the compiler.]),
|
|---|
| 453 | [case "$enableval" in
|
|---|
| 454 | no|off)
|
|---|
| 455 | # disable the default enabling:
|
|---|
| 456 | AC_DEFINE([PNG_INTEL_SSE_OPT], [0],
|
|---|
| 457 | [Disable Intel SSE optimizations])
|
|---|
| 458 | # Prevent inclusion of the assembler files below:
|
|---|
| 459 | enable_intel_sse=no;;
|
|---|
| 460 | yes|on)
|
|---|
| 461 | AC_DEFINE([PNG_INTEL_SSE_OPT], [1],
|
|---|
| 462 | [Enable Intel SSE optimizations]);;
|
|---|
| 463 | *)
|
|---|
| 464 | AC_MSG_ERROR([--enable-intel-sse=${enable_intel_sse}: invalid value])
|
|---|
| 465 | esac])
|
|---|
| 466 |
|
|---|
| 467 | # Add Intel specific files to all builds where the host_cpu is Intel ('x86*')
|
|---|
| 468 | # or where Intel optimizations were explicitly requested (this allows a
|
|---|
| 469 | # fallback if a future host CPU does not match 'x86*')
|
|---|
| 470 | AM_CONDITIONAL([PNG_INTEL_SSE],
|
|---|
| 471 | [test "$enable_intel_sse" != 'no' &&
|
|---|
| 472 | case "$host_cpu" in
|
|---|
| 473 | i?86|x86_64) :;;
|
|---|
| 474 | *) test "$enable_intel_sse" != '';;
|
|---|
| 475 | esac])
|
|---|
| 476 |
|
|---|
| 477 | # PowerPC
|
|---|
| 478 | # ===
|
|---|
| 479 | #
|
|---|
| 480 | # PowerPC VSX (SIMD) support.
|
|---|
| 481 |
|
|---|
| 482 | AC_ARG_ENABLE([powerpc-vsx],
|
|---|
| 483 | AS_HELP_STRING([[[--enable-powerpc-vsx]]],
|
|---|
| 484 | [Enable POWERPC VSX optimizations: =no/off, check, api, yes/on:]
|
|---|
| 485 | [no/off: disable the optimizations; check: use internal checking code]
|
|---|
| 486 | [api: disable by default, enable by a call to png_set_option]
|
|---|
| 487 | [yes/on: turn on unconditionally.]
|
|---|
| 488 | [If not specified: determined by the compiler.]),
|
|---|
| 489 | [case "$enableval" in
|
|---|
| 490 | no|off)
|
|---|
| 491 | # disable the default enabling on __ppc64__ systems:
|
|---|
| 492 | AC_DEFINE([PNG_POWERPC_VSX_OPT], [0],
|
|---|
| 493 | [Disable POWERPC VSX optimizations])
|
|---|
| 494 | # Prevent inclusion of the platform specific files below:
|
|---|
| 495 | enable_powerpc_vsx=no;;
|
|---|
| 496 | check)
|
|---|
| 497 | AC_DEFINE([PNG_POWERPC_VSX_CHECK_SUPPORTED], [],
|
|---|
| 498 | [Check for POWERPC VSX support at run-time])
|
|---|
| 499 | AC_MSG_WARN([--enable-powerpc-vsx Please check contrib/powerpc/README file]
|
|---|
| 500 | [for the list of supported OSes.]);;
|
|---|
| 501 | api)
|
|---|
| 502 | AC_DEFINE([PNG_POWERPC_VSX_API_SUPPORTED], [],
|
|---|
| 503 | [Turn on POWERPC VSX optimizations at run-time]);;
|
|---|
| 504 | yes|on)
|
|---|
| 505 | AC_DEFINE([PNG_POWERPC_VSX_OPT], [2],
|
|---|
| 506 | [Enable POWERPC VSX optimizations])
|
|---|
| 507 | AC_MSG_WARN([--enable-powerpc-vsx: please specify 'check' or 'api', if]
|
|---|
| 508 | [you want the optimizations unconditionally pass '-maltivec -mvsx']
|
|---|
| 509 | [or '-mcpu=power8'to the compiler.]);;
|
|---|
| 510 | *)
|
|---|
| 511 | AC_MSG_ERROR([--enable-powerpc-vsx=${enable_powerpc_vsx}: invalid value])
|
|---|
| 512 | esac])
|
|---|
| 513 |
|
|---|
| 514 | # Add PowerPC specific files to all builds where the host_cpu is powerpc('powerpc*') or
|
|---|
| 515 | # where POWERPC optimizations were explicitly requested (this allows a fallback if a
|
|---|
| 516 | # future host CPU does not match 'powerpc*')
|
|---|
| 517 |
|
|---|
| 518 | AM_CONDITIONAL([PNG_POWERPC_VSX],
|
|---|
| 519 | [test "$enable_powerpc_vsx" != 'no' &&
|
|---|
| 520 | case "$host_cpu" in
|
|---|
| 521 | powerpc*|ppc64*) :;;
|
|---|
| 522 | esac])
|
|---|
| 523 |
|
|---|
| 524 |
|
|---|
| 525 | AC_MSG_NOTICE([[Extra options for compiler: $PNG_COPTS]])
|
|---|
| 526 |
|
|---|
| 527 | # Config files, substituting as above
|
|---|
| 528 | AC_CONFIG_FILES([Makefile libpng.pc:libpng.pc.in])
|
|---|
| 529 | AC_CONFIG_FILES([libpng-config:libpng-config.in],
|
|---|
| 530 | [chmod +x libpng-config])
|
|---|
| 531 |
|
|---|
| 532 | AC_OUTPUT
|
|---|
