1 dnl configuration script for expat
2 dnl Process this file with autoconf to produce a configure script.
4 dnl Copyright 2000 Clark Cooper
6 dnl This file is part of EXPAT.
8 dnl EXPAT is free software; you can redistribute it and/or modify it
9 dnl under the terms of the License (based on the MIT/X license) contained
10 dnl in the file COPYING that comes with this distribution.
13 dnl Ensure that Expat is configured with autoconf 2.58 or newer
16 dnl Get the version number of Expat, using m4's esyscmd() command to run
17 dnl the command at m4-generation time. This allows us to create an m4
18 dnl symbol holding the correct version number. AC_INIT() requires the
19 dnl version number at m4-time, rather than when ./configure is run, so
20 dnl all this must happen as part of m4, not as part of the shell code
21 dnl contained in ./configure.
23 dnl NOTE: esyscmd() is a GNU M4 extension. Thus, we wrap it in an appropriate
24 dnl test. I believe this test will work, but I don't have a place with non-
25 dnl GNU M4 to test it right now.
26 define([expat_version], ifdef([__gnu__],
27 [esyscmd(conftools/get-version.sh lib/expat.h)],
29 AC_INIT(expat, expat_version, expat-bugs@libexpat.org)
30 undefine([expat_version])
32 AC_CONFIG_SRCDIR(Makefile.in)
33 AC_CONFIG_AUX_DIR(conftools)
34 AC_CONFIG_MACRO_DIR([m4])
38 dnl Increment LIBREVISION if source code has changed at all
40 dnl If the API has changed, increment LIBCURRENT and set LIBREVISION to 0
42 dnl If the API changes compatibly (i.e. simply adding a new function
43 dnl without changing or removing earlier interfaces), then increment LIBAGE.
45 dnl If the API changes incompatibly set LIBAGE back to 0
50 LIBAGE=6 # CMakeLists.txt!
52 AC_CONFIG_HEADER(expat_config.h)
54 sinclude(conftools/ac_c_bigendian_cross.m4)
63 dnl Checks for programs.
68 if test "$GCC" = yes ; then
70 dnl Be careful about adding the -fexceptions option; some versions of
71 dnl GCC don't support it and it causes extra warnings that are only
72 dnl distracting; avoid.
74 OLDCFLAGS="$CFLAGS -Wall -Wmissing-prototypes -Wstrict-prototypes"
75 CFLAGS="$OLDCFLAGS -fexceptions"
76 AC_MSG_CHECKING(whether $CC accepts -fexceptions)
79 AC_MSG_RESULT(no); CFLAGS="$OLDCFLAGS")
80 if test "x$CXXFLAGS" = x ; then
81 CXXFLAGS=`echo "$CFLAGS" | sed 's/ -Wmissing-prototypes -Wstrict-prototypes//'`
84 CFLAGS="${CFLAGS} -fno-strict-aliasing"
85 CXXFLAGS="${CXXFLAGS} -fno-strict-aliasing"
86 LDFLAGS="${LDFLAGS} -fno-strict-aliasing"
89 dnl Checks for header files.
92 dnl Checks for typedefs, structures, and compiler characteristics.
94 dnl Note: Avoid using AC_C_BIGENDIAN because it does not
95 dnl work in a cross compile.
100 AC_CHECK_FUNCS(memmove bcopy)
103 AC_ARG_WITH([libbsd], [
104 AS_HELP_STRING([--with-libbsd], [utilize libbsd (for arc4random_buf)])
105 ], [], [with_libbsd=no])
106 AS_IF([test "x${with_libbsd}" != xno], [
107 AC_CHECK_LIB([bsd], [arc4random_buf], [], [
108 AS_IF([test "x${with_libbsd}" = xyes], [
109 AC_MSG_ERROR([Enforced use of libbsd cannot be satisfied.])
113 AC_MSG_CHECKING([for arc4random_buf (BSD or libbsd)])
114 AC_LINK_IFELSE([AC_LANG_SOURCE([
115 #include <stdlib.h> /* for arc4random_buf on BSD, for NULL */
116 #if defined(HAVE_LIBBSD)
117 # include <bsd/stdlib.h>
120 arc4random_buf(NULL, 0U);
124 AC_DEFINE([HAVE_ARC4RANDOM_BUF], [1],
125 [Define to 1 if you have the `arc4random_buf' function.])
130 AC_MSG_CHECKING([for arc4random (BSD, macOS or libbsd)])
131 AC_LINK_IFELSE([AC_LANG_SOURCE([
132 #if defined(HAVE_LIBBSD)
133 # include <bsd/stdlib.h>
142 AC_DEFINE([HAVE_ARC4RANDOM], [1],
143 [Define to 1 if you have the `arc4random' function.])
151 AC_MSG_CHECKING([for getrandom (Linux 3.17+, glibc 2.25+)])
152 AC_LINK_IFELSE([AC_LANG_SOURCE([
153 #include <stdlib.h> /* for NULL */
154 #include <sys/random.h>
156 return getrandom(NULL, 0U, 0U);
159 AC_DEFINE([HAVE_GETRANDOM], [1],
160 [Define to 1 if you have the `getrandom' function.])
165 AC_MSG_CHECKING([for syscall SYS_getrandom (Linux 3.17+)])
166 AC_LINK_IFELSE([AC_LANG_SOURCE([
167 #include <stdlib.h> /* for NULL */
168 #include <unistd.h> /* for syscall */
169 #include <sys/syscall.h> /* for SYS_getrandom */
171 syscall(SYS_getrandom, NULL, 0, 0);
175 AC_DEFINE([HAVE_SYSCALL_GETRANDOM], [1],
176 [Define to 1 if you have `syscall' and `SYS_getrandom'.])
184 dnl Only needed for xmlwf:
185 AC_CHECK_HEADERS(fcntl.h unistd.h)
189 if test "$ac_cv_func_mmap_fixed_mapped" = "yes"; then
197 dnl Some basic configuration:
198 AC_DEFINE([XML_NS], 1,
199 [Define to make XML Namespaces functionality available.])
200 AC_DEFINE([XML_DTD], 1,
201 [Define to make parameter entity parsing functionality available.])
202 AC_DEFINE([XML_DEV_URANDOM], 1,
203 [Define to include code reading entropy from `/dev/urandom'.])
205 AC_ARG_ENABLE([xml-context],
206 AS_HELP_STRING([--enable-xml-context @<:@COUNT@:>@],
207 [Retain context around the current parse point;
208 default is enabled and a size of 1024 bytes])
209 AS_HELP_STRING([--disable-xml-context],
210 [Do not retain context around the current parse point]),
211 [enable_xml_context=${enableval}])
212 AS_IF([test "x${enable_xml_context}" != "xno"], [
213 AS_IF([test "x${enable_xml_context}" = "xyes" \
214 -o "x${enable_xml_context}" = "x"], [
215 enable_xml_context=1024
217 AC_DEFINE_UNQUOTED([XML_CONTEXT_BYTES], [${enable_xml_context}],
218 [Define to specify how much context to retain around the current parse point.])
221 AC_CONFIG_FILES([Makefile expat.pc])
222 AC_CONFIG_FILES([run.sh], [chmod +x run.sh])
225 abs_srcdir="`cd $srcdir && pwd`"
227 if test "$abs_srcdir" != "$abs_builddir"; then