3 dnl Process this file with autoconf to produce a configure script.
5 dnl Minor upgrades (compatible ABI): increment the package version
6 dnl (third field in two places below) and set the PNGLIB_RELEASE
9 dnl Major upgrades (incompatible ABI): increment the package major
10 dnl version (second field, or first if desired), set the minor
11 dnl to 0, set PNGLIB_MAJOR below *and* follow the instructions in
12 dnl Makefile.am to upgrade the package name.
14 dnl This is here to prevent earlier autoconf from being used, it
15 dnl should not be necessary to regenerate configure if the time
16 dnl stamps are correct
19 dnl Version number stuff here:
21 AC_INIT([libpng], [1.5.10], [png-mng-implement@lists.sourceforge.net])
23 dnl stop configure from automagically running automake
31 dnl End of version number stuff
33 AC_CONFIG_SRCDIR([pngget.c])
34 AM_CONFIG_HEADER(config.h)
36 # Checks for programs.
42 AC_CHECK_TOOL(SED, sed, :)
43 AC_CHECK_TOOL(AWK, awk, :)
49 # On Solaris 10 and 12 CPP gets set to cc -E, however this still
50 # does some input parsing. We need strict ANSI-C style tokenization,
53 AC_MSG_CHECKING([for a C preprocessor that does not parse its input])
54 AC_TRY_CPP([1.5.0 16BIT],
58 for CPP in "${CC-cc} -E" "${CC-cc} -E -traditional-cpp" "/lib/cpp" "cpp"; do
59 AC_TRY_CPP([1.5.0 16BIT],
64 if test -n "$DFNCPP"; then
65 AC_MSG_RESULT([$DFNCPP])
68 AC_MSG_FAILURE([not found], 1)
71 # Checks for header files.
73 AC_CHECK_HEADERS([malloc.h stdlib.h string.h strings.h])
75 # Checks for typedefs, structures, and compiler characteristics.
81 # Checks for library functions.
83 AC_CHECK_FUNCS([memset], , AC_ERROR([memset not found in libc]))
84 AC_CHECK_FUNCS([pow], , AC_CHECK_LIB(m, pow, , AC_ERROR([cannot find pow])) )
85 AC_ARG_WITH(zlib-prefix,
86 AC_HELP_STRING([--with-zlib-prefix],
87 [prefix that may have been used in installed zlib]),
90 AC_CHECK_LIB(z, zlibVersion, ,
91 AC_CHECK_LIB(z, ${ZPREFIX}zlibVersion, ,
92 AC_ERROR([zlib not installed])))
94 # The following is for pngvalid, to ensure it catches FP errors even on
95 # platforms that don't enable FP exceptions, the function appears in the math
96 # library (typically), it's not an error if it is not found.
97 AC_CHECK_LIB([m], [feenableexcept])
98 AC_CHECK_FUNCS([feenableexcept])
100 LIBPNG_DEFINES=-DPNG_CONFIGURE_LIBPNG
101 LIBPNG_DEFINES=$LIBPNG_DEFINES
102 AC_SUBST(LIBPNG_DEFINES)
104 AC_MSG_CHECKING([if using Solaris linker])
105 SLD=`$LD --version 2>&1 | grep Solaris`
113 AM_CONDITIONAL(HAVE_SOLARIS_LD, test "$have_solaris_ld" = "yes")
115 AC_MSG_CHECKING([if libraries can be versioned])
116 # Special case for PE/COFF platforms: ld reports
117 # support for version-script, but doesn't actually
118 # DO anything with it.
120 *cygwin* | *mingw32* | *interix* )
121 have_ld_version_script=no
126 if test "$have_solaris_ld" = "yes"; then
127 GLD=`$LD --help < /dev/null 2>&1 | grep 'M mapfile'`
129 GLD=`$LD --help < /dev/null 2>/dev/null | grep version-script`
133 have_ld_version_script=yes
136 have_ld_version_script=no
138 AC_MSG_WARN(*** You have not enabled versioned symbols.)
143 AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")
145 if test "$have_ld_version_script" = "yes"; then
146 AC_MSG_CHECKING([for symbol prefix])
147 SYMBOL_PREFIX=`echo "PREFIX=__USER_LABEL_PREFIX__" \
148 | ${CPP-${CC-gcc} -E} - 2>&1 \
149 | ${EGREP-grep} "^PREFIX=" \
150 | ${SED-sed} "s:^PREFIX=::"`
151 AC_SUBST(SYMBOL_PREFIX)
152 AC_MSG_RESULT($SYMBOL_PREFIX)
155 # Substitutions for .in files
156 AC_SUBST(PNGLIB_VERSION)
157 AC_SUBST(PNGLIB_MAJOR)
158 AC_SUBST(PNGLIB_MINOR)
159 AC_SUBST(PNGLIB_RELEASE)
161 # Additional arguments (and substitutions)
162 # Allow the pkg-config directory to be set
163 AC_ARG_WITH(pkgconfigdir,
164 AC_HELP_STRING([--with-pkgconfigdir],
165 [Use the specified pkgconfig dir (default is libdir/pkgconfig)]),
166 [pkgconfigdir=${withval}],
167 [pkgconfigdir='${libdir}/pkgconfig'])
169 AC_SUBST([pkgconfigdir])
170 AC_MSG_NOTICE([pkgconfig directory is ${pkgconfigdir}])
172 # Make the *-config binary config scripts optional
173 AC_ARG_WITH(binconfigs,
174 AC_HELP_STRING([--with-binconfigs],
175 [Generate shell libpng-config scripts as well as pkg-config data]
176 [@<:@default=yes@:>@]),
177 [if test "${withval}" = no; then
179 AC_MSG_NOTICE([libpng-config scripts will not be built])
181 binconfigs='${binconfigs}'
183 [binconfigs='${binconfigs}'])
184 AC_SUBST([binconfigs])
186 # Because GCC by default assembles code with an executable stack, even though it
187 # compiles C code with a non-executable stack, it is necessary to do a fixup
188 # here (this may by GCC specific)
189 AC_SUBST([AM_CCASFLAGS], [-Wa,--noexecstack])
191 AC_ARG_ENABLE([arm-neon],
192 AC_HELP_STRING([--enable-arm-neon], [Enable ARM NEON optimizations]),
193 [if test "${enableval}" = yes; then
194 AC_DEFINE([PNG_ARM_NEON], [1], [Enable ARM NEON optimizations])
195 AC_DEFINE([PNG_ALIGNED_MEMORY_SUPPORTED], [1], [Align row buffers])
197 AM_CONDITIONAL([PNG_ARM_NEON], [test "${enable_arm_neon:-no}" = yes])
199 # Config files, substituting as above
200 AC_CONFIG_FILES([Makefile libpng.pc:libpng.pc.in])
201 AC_CONFIG_FILES([libpng-config:libpng-config.in],
202 [chmod +x libpng-config])