]> git.saurik.com Git - wxWidgets.git/blame_incremental - src/png/configure.ac
Applied #15375 to stop event-sending in generic wxSpinCtrl ctor (eco)
[wxWidgets.git] / src / png / configure.ac
... / ...
CommitLineData
1# configure.ac
2
3dnl Process this file with autoconf to produce a configure script.
4dnl
5dnl Minor upgrades (compatible ABI): increment the package version
6dnl (third field in two places below) and set the PNGLIB_RELEASE
7dnl variable.
8dnl
9dnl Major upgrades (incompatible ABI): increment the package major
10dnl version (second field, or first if desired), set the minor
11dnl to 0, set PNGLIB_MAJOR below *and* follow the instructions in
12dnl Makefile.am to upgrade the package name.
13
14dnl This is here to prevent earlier autoconf from being used, it
15dnl should not be necessary to regenerate configure if the time
16dnl stamps are correct
17AC_PREREQ([2.68])
18
19dnl Version number stuff here:
20
21AC_INIT([libpng],[1.6.2],[png-mng-implement@lists.sourceforge.net])
22AC_CONFIG_MACRO_DIR([scripts])
23
24# libpng does not follow GNU file name conventions (hence 'foreign')
25# color-tests requires automake 1.11 or later
26# silent-rules requires automake 1.11 or later
27# dist-xz requires automake 1.11 or later
28# 1.12.2 fixes a security issue in 1.11.2 and 1.12.1
29# 1.13 is required for parallel tests
30AM_INIT_AUTOMAKE([1.13 foreign dist-xz color-tests silent-rules])
31# The following line causes --disable-maintainer-mode to be the default to
32# configure, this is necessary because libpng distributions cannot rely on the
33# time stamps of the autotools generated files being correct
34AM_MAINTAINER_MODE
35
36dnl configure.ac and Makefile.am expect automake 1.11.2 or a compatible later
37dnl version; aclocal.m4 will generate a failure if you use a prior version of
38dnl automake, so the following is not necessary (and is not defined anyway):
39dnl AM_PREREQ([1.11.2])
40dnl stop configure from automagically running automake
41
42PNGLIB_VERSION=1.6.2
43PNGLIB_MAJOR=1
44PNGLIB_MINOR=6
45PNGLIB_RELEASE=2
46
47dnl End of version number stuff
48
49AC_CONFIG_SRCDIR([pngget.c])
50AC_CONFIG_HEADERS([config.h])
51
52# Checks for programs.
53AC_LANG([C])
54AC_PROG_CC
55AM_PROG_AS
56LT_PATH_LD
57AC_PROG_CPP
58AC_PROG_AWK
59AC_PROG_INSTALL
60AC_PROG_LN_S
61AC_PROG_MAKE_SET
62
63dnl libtool/libtoolize; version 2.4.2 is the tested version, this or any
64dnl compatible later version may be used
65LT_INIT([win32-dll])
66LT_PREREQ([2.4.2])
67
68# Some awks crash when confronted with pnglibconf.dfa, do a test run now
69# to make sure this doesn't happen
70AC_MSG_CHECKING([that AWK works])
71if ${AWK} -f ${srcdir}/scripts/options.awk out="/dev/null" version=search\
72 ${srcdir}/pngconf.h ${srcdir}/scripts/pnglibconf.dfa\
73 ${srcdir}/pngusr.dfa 1>&2
74then
75 AC_MSG_RESULT([ok])
76else
77 AC_MSG_FAILURE([failed], 1)
78fi
79
80# This is a remnant of the old cc -E validation, where it may have been
81# necessary to use a different preprocessor for .dfn files
82DFNCPP="$CPP"
83AC_SUBST(DFNCPP)
84
85# -Werror cannot be passed to GCC in CFLAGS because configure will fail (it
86# checks the compiler with a program that generates a warning), add the
87# following option to deal with this
88AC_ARG_VAR(PNG_COPTS,
89 [additional flags for the C compiler, use this for options that would]
90 [cause configure itself to fail])
91AC_ARG_ENABLE(werror,
92 AS_HELP_STRING([[[--enable-werror[=OPT]]]],
93 [Pass -Werror or the given argument to the compiler if it is supported]),
94 [test "$enable_werror" = "yes" && enable_werror="-Werror"
95 if test "$enable_werror" != "no"; then
96 sav_CFLAGS="$CFLAGS"
97 CFLAGS="$enable_werror $CFLAGS"
98 AC_MSG_CHECKING([if the compiler allows $enable_werror])
99 AC_COMPILE_IFELSE(
100 [AC_LANG_SOURCE([
101 [int main(int argc, char **argv){]
102 [return argv[argc-1][0];]
103 [}]])],
104 AC_MSG_RESULT(yes)
105 PNG_COPTS="$PNG_COPTS $enable_werror",
106 AC_MSG_RESULT(no))
107 CFLAGS="$sav_CFLAGS"
108 fi],)
109
110# Checks for header files.
111AC_HEADER_STDC
112
113# Checks for typedefs, structures, and compiler characteristics.
114AC_C_CONST
115AC_TYPE_SIZE_T
116AC_STRUCT_TM
117AC_C_RESTRICT
118
119# Checks for library functions.
120AC_FUNC_STRTOD
121AC_CHECK_FUNCS([memset], , AC_MSG_ERROR(memset not found in libc))
122AC_CHECK_FUNCS([pow], , AC_CHECK_LIB(m, pow, , AC_MSG_ERROR(cannot find pow)) )
123AC_ARG_WITH(zlib-prefix,
124 AS_HELP_STRING([[[--with-zlib-prefix]]],
125 [prefix that may have been used in installed zlib]),
126 [ZPREFIX=${withval}],
127 [ZPREFIX='z_'])
128AC_CHECK_LIB(z, zlibVersion, ,
129 AC_CHECK_LIB(z, ${ZPREFIX}zlibVersion, , AC_MSG_ERROR(zlib not installed)))
130
131# The following is for pngvalid, to ensure it catches FP errors even on
132# platforms that don't enable FP exceptions, the function appears in the math
133# library (typically), it's not an error if it is not found.
134AC_CHECK_LIB([m], [feenableexcept])
135AC_CHECK_FUNCS([feenableexcept])
136
137AC_MSG_CHECKING([if using Solaris linker])
138SLD=`$LD --version 2>&1 | grep Solaris`
139if test "$SLD"; then
140 have_solaris_ld=yes
141 AC_MSG_RESULT(yes)
142else
143 have_solaris_ld=no
144 AC_MSG_RESULT(no)
145fi
146AM_CONDITIONAL(HAVE_SOLARIS_LD, test "$have_solaris_ld" = "yes")
147
148AC_MSG_CHECKING([if libraries can be versioned])
149# Special case for PE/COFF platforms: ld reports
150# support for version-script, but doesn't actually
151# DO anything with it.
152case $host in
153*cygwin* | *mingw32* | *interix* )
154 have_ld_version_script=no
155 AC_MSG_RESULT(no)
156;;
157* )
158
159if test "$have_solaris_ld" = "yes"; then
160 GLD=`$LD --help < /dev/null 2>&1 | grep 'M mapfile'`
161else
162 GLD=`$LD --help < /dev/null 2>/dev/null | grep version-script`
163fi
164
165if test "$GLD"; then
166 have_ld_version_script=yes
167 AC_MSG_RESULT(yes)
168else
169 have_ld_version_script=no
170 AC_MSG_RESULT(no)
171 AC_MSG_WARN(*** You have not enabled versioned symbols.)
172fi
173;;
174esac
175
176AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")
177
178if test "$have_ld_version_script" = "yes"; then
179 AC_MSG_CHECKING([for symbol prefix])
180 SYMBOL_PREFIX=`echo "PREFIX=__USER_LABEL_PREFIX__" \
181 | ${CPP-${CC-gcc} -E} - 2>&1 \
182 | ${EGREP-grep} "^PREFIX=" \
183 | ${SED-sed} -e "s:^PREFIX=::" -e "s:__USER_LABEL_PREFIX__::"`
184 AC_SUBST(SYMBOL_PREFIX)
185 AC_MSG_RESULT($SYMBOL_PREFIX)
186fi
187
188# Substitutions for .in files
189AC_SUBST(PNGLIB_VERSION)
190AC_SUBST(PNGLIB_MAJOR)
191AC_SUBST(PNGLIB_MINOR)
192AC_SUBST(PNGLIB_RELEASE)
193
194# Additional arguments (and substitutions)
195# Allow the pkg-config directory to be set
196AC_ARG_WITH(pkgconfigdir,
197 AS_HELP_STRING([[[--with-pkgconfigdir]]],
198 [Use the specified pkgconfig dir (default is libdir/pkgconfig)]),
199 [pkgconfigdir=${withval}],
200 [pkgconfigdir='${libdir}/pkgconfig'])
201
202AC_SUBST([pkgconfigdir])
203AC_MSG_NOTICE([[pkgconfig directory is ${pkgconfigdir}]])
204
205# Make the *-config binary config scripts optional
206AC_ARG_WITH(binconfigs,
207 AS_HELP_STRING([[[--with-binconfigs]]],
208 [Generate shell libpng-config scripts as well as pkg-config data]
209 [@<:@default=yes@:>@]),
210 [if test "${withval}" = no; then
211 binconfigs=
212 AC_MSG_NOTICE([[libpng-config scripts will not be built]])
213 else
214 binconfigs='${binconfigs}'
215 fi],
216 [binconfigs='${binconfigs}'])
217AC_SUBST([binconfigs])
218
219# Support for prefixes to the API function names; this will generate defines
220# at the start of the build to rename exported library functions
221AC_ARG_WITH(libpng-prefix,
222 AS_HELP_STRING([[[--with-libpng-prefix]]],
223 [prefix libpng exported function (API) names with the given value]),
224 [if test "${withval:-no}" != "no"; then
225 AC_SUBST([PNG_PREFIX], [${withval}])
226 fi])
227AM_CONDITIONAL([DO_PNG_PREFIX], [test "${with_libpng_prefix:-no}" != "no"])
228
229# Because GCC by default assembles code with an executable stack, even though it
230# compiles C code with a non-executable stack, it is necessary to do a fixup
231# here (this may by GCC specific)
232# AC_SUBST([AM_CCASFLAGS], [-Wa,--noexecstack])
233
234AC_ARG_ENABLE([arm-neon],
235 AS_HELP_STRING([[[--enable-arm-neon]]],
236 [Enable ARM NEON optimizations: =off, check, api, on:]
237 [off: disable the optimizations; check: use internal checking code]
238 [(deprecated and poorly supported); api: disable by default, enable by]
239 [a call to png_set_option; on: turn on unconditionally. The]
240 [default is 'on' if __ARM_NEON__ is defined, otherwise 'off'.]),
241 [case "$enableval" in
242 off)
243 AC_DEFINE([PNG_NO_ARM_NEON], [],
244 [Disable ARM Neon optimizations]);;
245 check)
246 AC_DEFINE([PNG_ARM_NEON_CHECK_SUPPORTED], [],
247 [Check for ARM Neon support at run-time]);;
248 api)
249 AC_DEFINE([PNG_ARM_NEON_API_SUPPORTED], [],
250 [Turn on ARM Neon optimizations at run-time]);;
251 on)
252 AC_DEFINE([PNG_ARM_NEON_SUPPORTED], [],
253 [Enable ARM Neon optimizations]);;
254 *)
255 AC_MSG_ERROR([arm-neon: option value required (off/check/api/on)]);;
256 esac])
257AM_CONDITIONAL([PNG_ARM_NEON], [test "${enable_arm_neon:-no}" != "no"])
258
259AC_MSG_NOTICE([[Extra options for compiler: $PNG_COPTS]])
260
261# Config files, substituting as above
262AC_CONFIG_FILES([Makefile libpng.pc:libpng.pc.in])
263AC_CONFIG_FILES([libpng-config:libpng-config.in],
264 [chmod +x libpng-config])
265
266AC_OUTPUT