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1 | # configure.ac | |
2 | ||
3 | dnl Process this file with autoconf to produce a configure script. | |
4 | dnl | |
5 | dnl Minor upgrades (compatible ABI): increment the package version | |
6 | dnl (third field in two places below) and set the PNGLIB_RELEASE | |
7 | dnl variable. | |
8 | dnl | |
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. | |
13 | ||
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 | |
17 | AC_PREREQ([2.68]) | |
18 | ||
19 | dnl Version number stuff here: | |
20 | ||
21 | AC_INIT([libpng],[1.6.2],[png-mng-implement@lists.sourceforge.net]) | |
22 | AC_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 | |
30 | AM_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 | |
34 | AM_MAINTAINER_MODE | |
35 | ||
36 | dnl configure.ac and Makefile.am expect automake 1.11.2 or a compatible later | |
37 | dnl version; aclocal.m4 will generate a failure if you use a prior version of | |
38 | dnl automake, so the following is not necessary (and is not defined anyway): | |
39 | dnl AM_PREREQ([1.11.2]) | |
40 | dnl stop configure from automagically running automake | |
41 | ||
42 | PNGLIB_VERSION=1.6.2 | |
43 | PNGLIB_MAJOR=1 | |
44 | PNGLIB_MINOR=6 | |
45 | PNGLIB_RELEASE=2 | |
46 | ||
47 | dnl End of version number stuff | |
48 | ||
49 | AC_CONFIG_SRCDIR([pngget.c]) | |
50 | AC_CONFIG_HEADERS([config.h]) | |
51 | ||
52 | # Checks for programs. | |
53 | AC_LANG([C]) | |
54 | AC_PROG_CC | |
55 | AM_PROG_AS | |
56 | LT_PATH_LD | |
57 | AC_PROG_CPP | |
58 | AC_PROG_AWK | |
59 | AC_PROG_INSTALL | |
60 | AC_PROG_LN_S | |
61 | AC_PROG_MAKE_SET | |
62 | ||
63 | dnl libtool/libtoolize; version 2.4.2 is the tested version, this or any | |
64 | dnl compatible later version may be used | |
65 | LT_INIT([win32-dll]) | |
66 | LT_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 | |
70 | AC_MSG_CHECKING([that AWK works]) | |
71 | if ${AWK} -f ${srcdir}/scripts/options.awk out="/dev/null" version=search\ | |
72 | ${srcdir}/pngconf.h ${srcdir}/scripts/pnglibconf.dfa\ | |
73 | ${srcdir}/pngusr.dfa 1>&2 | |
74 | then | |
75 | AC_MSG_RESULT([ok]) | |
76 | else | |
77 | AC_MSG_FAILURE([failed], 1) | |
78 | fi | |
79 | ||
80 | # This is a remnant of the old cc -E validation, where it may have been | |
81 | # necessary to use a different preprocessor for .dfn files | |
82 | DFNCPP="$CPP" | |
83 | AC_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 | |
88 | AC_ARG_VAR(PNG_COPTS, | |
89 | [additional flags for the C compiler, use this for options that would] | |
90 | [cause configure itself to fail]) | |
91 | AC_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. | |
111 | AC_HEADER_STDC | |
112 | ||
113 | # Checks for typedefs, structures, and compiler characteristics. | |
114 | AC_C_CONST | |
115 | AC_TYPE_SIZE_T | |
116 | AC_STRUCT_TM | |
117 | AC_C_RESTRICT | |
118 | ||
119 | # Checks for library functions. | |
120 | AC_FUNC_STRTOD | |
121 | AC_CHECK_FUNCS([memset], , AC_MSG_ERROR(memset not found in libc)) | |
122 | AC_CHECK_FUNCS([pow], , AC_CHECK_LIB(m, pow, , AC_MSG_ERROR(cannot find pow)) ) | |
123 | AC_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_']) | |
128 | AC_CHECK_LIB(z, zlibVersion, , | |
129 | AC_CHECK_LIB(z, ${ZPREFIX}zlibVersion, , AC_MSG_ERROR(zlib not installed))) | |
130 | ||
131 | # The following is for pngvalid, to ensure it catches FP errors even on | |
132 | # platforms that don't enable FP exceptions, the function appears in the math | |
133 | # library (typically), it's not an error if it is not found. | |
134 | AC_CHECK_LIB([m], [feenableexcept]) | |
135 | AC_CHECK_FUNCS([feenableexcept]) | |
136 | ||
137 | AC_MSG_CHECKING([if using Solaris linker]) | |
138 | SLD=`$LD --version 2>&1 | grep Solaris` | |
139 | if test "$SLD"; then | |
140 | have_solaris_ld=yes | |
141 | AC_MSG_RESULT(yes) | |
142 | else | |
143 | have_solaris_ld=no | |
144 | AC_MSG_RESULT(no) | |
145 | fi | |
146 | AM_CONDITIONAL(HAVE_SOLARIS_LD, test "$have_solaris_ld" = "yes") | |
147 | ||
148 | AC_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. | |
152 | case $host in | |
153 | *cygwin* | *mingw32* | *interix* ) | |
154 | have_ld_version_script=no | |
155 | AC_MSG_RESULT(no) | |
156 | ;; | |
157 | * ) | |
158 | ||
159 | if test "$have_solaris_ld" = "yes"; then | |
160 | GLD=`$LD --help < /dev/null 2>&1 | grep 'M mapfile'` | |
161 | else | |
162 | GLD=`$LD --help < /dev/null 2>/dev/null | grep version-script` | |
163 | fi | |
164 | ||
165 | if test "$GLD"; then | |
166 | have_ld_version_script=yes | |
167 | AC_MSG_RESULT(yes) | |
168 | else | |
169 | have_ld_version_script=no | |
170 | AC_MSG_RESULT(no) | |
171 | AC_MSG_WARN(*** You have not enabled versioned symbols.) | |
172 | fi | |
173 | ;; | |
174 | esac | |
175 | ||
176 | AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes") | |
177 | ||
178 | if 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) | |
186 | fi | |
187 | ||
188 | # Substitutions for .in files | |
189 | AC_SUBST(PNGLIB_VERSION) | |
190 | AC_SUBST(PNGLIB_MAJOR) | |
191 | AC_SUBST(PNGLIB_MINOR) | |
192 | AC_SUBST(PNGLIB_RELEASE) | |
193 | ||
194 | # Additional arguments (and substitutions) | |
195 | # Allow the pkg-config directory to be set | |
196 | AC_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 | ||
202 | AC_SUBST([pkgconfigdir]) | |
203 | AC_MSG_NOTICE([[pkgconfig directory is ${pkgconfigdir}]]) | |
204 | ||
205 | # Make the *-config binary config scripts optional | |
206 | AC_ARG_WITH(binconfigs, | |
207 | AS_HELP_STRING([[[--with-binconfigs]]], | |
208 | [Generate shell libpng-config scripts as well as pkg-config data] | |
209 | [@<:@default=yes@:>@]), | |
210 | [if test "${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}']) | |
217 | AC_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 | |
221 | AC_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]) | |
227 | AM_CONDITIONAL([DO_PNG_PREFIX], [test "${with_libpng_prefix:-no}" != "no"]) | |
228 | ||
229 | # Because GCC by default assembles code with an executable stack, even though it | |
230 | # compiles C code with a non-executable stack, it is necessary to do a fixup | |
231 | # here (this may by GCC specific) | |
232 | # AC_SUBST([AM_CCASFLAGS], [-Wa,--noexecstack]) | |
233 | ||
234 | AC_ARG_ENABLE([arm-neon], | |
235 | AS_HELP_STRING([[[--enable-arm-neon]]], | |
236 | [Enable ARM NEON optimizations: =off, check, api, on:] | |
237 | [off: disable the optimizations; check: use internal checking code] | |
238 | [(deprecated and poorly supported); api: disable by default, enable by] | |
239 | [a call to png_set_option; on: turn on unconditionally. The] | |
240 | [default is 'on' if __ARM_NEON__ is defined, otherwise 'off'.]), | |
241 | [case "$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]) | |
257 | AM_CONDITIONAL([PNG_ARM_NEON], [test "${enable_arm_neon:-no}" != "no"]) | |
258 | ||
259 | AC_MSG_NOTICE([[Extra options for compiler: $PNG_COPTS]]) | |
260 | ||
261 | # Config files, substituting as above | |
262 | AC_CONFIG_FILES([Makefile libpng.pc:libpng.pc.in]) | |
263 | AC_CONFIG_FILES([libpng-config:libpng-config.in], | |
264 | [chmod +x libpng-config]) | |
265 | ||
266 | AC_OUTPUT |