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 2.69 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 m4_define([expat_version],
28 [esyscmd(conftools/get-version.sh lib/expat.h)],
30 AC_INIT(expat, expat_version, expat-bugs@libexpat.org)
31 m4_undefine([expat_version])
33 AC_CONFIG_SRCDIR([Makefile.in])
34 AC_CONFIG_AUX_DIR([conftools])
35 AC_CONFIG_MACRO_DIR([m4])
41 dnl Increment LIBREVISION if source code has changed at all
43 dnl If the API has changed, increment LIBCURRENT and set LIBREVISION to 0
45 dnl If the API changes compatibly (i.e. simply adding a new function
46 dnl without changing or removing earlier interfaces), then increment LIBAGE.
48 dnl If the API changes incompatibly set LIBAGE back to 0
53 LIBAGE=6 # CMakeLists.txt!
55 AX_APPEND_FLAG([-DHAVE_EXPAT_CONFIG_H], [CPPFLAGS])
56 AC_CONFIG_HEADER([expat_config.h])
72 AS_IF([test "$GCC" = yes],
73 [AX_APPEND_COMPILE_FLAGS([-Wall -Wextra], [CFLAGS])
74 dnl Be careful about adding the -fexceptions option; some versions of
75 dnl GCC don't support it and it causes extra warnings that are only
76 dnl distracting; avoid.
77 AX_APPEND_COMPILE_FLAGS([-fexceptions], [CFLAGS])
78 AX_APPEND_COMPILE_FLAGS([-fno-strict-aliasing -Wmissing-prototypes -Wstrict-prototypes], [CFLAGS])
79 AX_APPEND_COMPILE_FLAGS([-pedantic -Wduplicated-cond -Wduplicated-branches -Wlogical-op], [CFLAGS])
80 AX_APPEND_COMPILE_FLAGS([-Wrestrict -Wnull-dereference -Wjump-misses-init -Wdouble-promotion], [CFLAGS])
81 AX_APPEND_COMPILE_FLAGS([-Wshadow -Wformat=2 -Wmisleading-indentation], [CFLAGS])])
85 AS_IF([test "$GCC" = yes],
86 [AX_APPEND_COMPILE_FLAGS([-Wall -Wextra], [CXXFLAGS])
87 dnl Be careful about adding the -fexceptions option; some versions of
88 dnl GCC don't support it and it causes extra warnings that are only
89 dnl distracting; avoid.
90 AX_APPEND_COMPILE_FLAGS([-fexceptions], [CXXFLAGS])
91 AX_APPEND_COMPILE_FLAGS([-fno-strict-aliasing], [CXXFLAGS])])
94 AS_IF([test "$GCC" = yes],
95 [AX_APPEND_LINK_FLAGS([-fno-strict-aliasing],[LDFLAGS])])
97 dnl patching ${archive_cmds} to affect generation of file "libtool" to fix linking with clang (issue #312)
98 AS_CASE(["$LD"],[*clang*],
99 [AS_CASE(["${host_os}"],
100 [*linux*],[archive_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'])])
102 EXPATCFG_COMPILER_SUPPORTS_VISIBILITY([
103 AX_APPEND_FLAG([-fvisibility=hidden], [CFLAGS])
104 AX_APPEND_FLAG([-DXML_ENABLE_VISIBILITY=1], [CFLAGS])])
106 dnl Checks for header files.
109 dnl Checks for typedefs, structures, and compiler characteristics.
111 dnl We define BYTEORDER to 1234 when the platform is little endian; it
112 dnl defines it to 4321 when the platform is big endian. We also define
113 dnl WORDS_BIGENDIAN to 1 when the platform is big endian.
115 dnl A long time ago (early 2000 years) AC_C_BIGENDIAN was considered
116 dnl wrong when cross compiling, now (2018, GNU Autoconf 2.69) we assume
118 AC_C_BIGENDIAN([AC_DEFINE([WORDS_BIGENDIAN], 1)
119 AS_VAR_SET([BYTEORDER], 4321)],
120 [AS_VAR_SET([BYTEORDER], 1234)])
121 AC_DEFINE_UNQUOTED([BYTEORDER], $BYTEORDER, [1234 = LILENDIAN, 4321 = BIGENDIAN])
127 [AS_HELP_STRING([--without-xmlwf], [do not build xmlwf])],
130 AM_CONDITIONAL([WITH_XMLWF], [test x${with_xmlwf} = xyes])
132 AC_ARG_WITH([examples],
133 [AS_HELP_STRING([--without-examples], [do not build examples @<:@default=included@:>@])],
136 AM_CONDITIONAL([WITH_EXAMPLES], [test x${with_examples} = xyes])
139 [AS_HELP_STRING([--without-tests], [do not build tests @<:@default=included@:>@])],
142 AM_CONDITIONAL([WITH_TESTS], [test x${with_tests} = xyes])
145 AS_VAR_SET([EXPATCFG_ON_MINGW],[no])
146 AS_CASE("${host_os}",
148 [AS_VAR_SET([EXPATCFG_ON_MINGW],[yes])
149 AC_MSG_NOTICE([detected OS: MinGW])])
150 AM_CONDITIONAL([MINGW], [test x${EXPATCFG_ON_MINGW} = xyes])
152 AM_CONDITIONAL([UNICODE], [echo -- "${CPPFLAGS}${CFLAGS}" | ${FGREP} XML_UNICODE >/dev/null])
155 AC_ARG_WITH([libbsd],
156 [AS_HELP_STRING([--with-libbsd], [utilize libbsd (for arc4random_buf)])],
159 AS_IF([test "x${with_libbsd}" != xno],
163 [AS_IF([test "x${with_libbsd}" = xyes],
164 [AC_MSG_ERROR([Enforced use of libbsd cannot be satisfied.])])])])
165 AC_MSG_CHECKING([for arc4random_buf (BSD or libbsd)])
166 AC_LINK_IFELSE([AC_LANG_SOURCE([
167 #include <stdlib.h> /* for arc4random_buf on BSD, for NULL */
168 #if defined(HAVE_LIBBSD)
169 # include <bsd/stdlib.h>
172 arc4random_buf(NULL, 0U);
176 [AC_DEFINE([HAVE_ARC4RANDOM_BUF], [1], [Define to 1 if you have the `arc4random_buf' function.])
177 AC_MSG_RESULT([yes])],
180 AC_MSG_CHECKING([for arc4random (BSD, macOS or libbsd)])
181 AC_LINK_IFELSE([AC_LANG_SOURCE([
182 #if defined(HAVE_LIBBSD)
183 # include <bsd/stdlib.h>
192 [AC_DEFINE([HAVE_ARC4RANDOM], [1], [Define to 1 if you have the `arc4random' function.])
193 AC_MSG_RESULT([yes])],
194 [AC_MSG_RESULT([no])])])
196 AC_ARG_WITH([getrandom],
197 [AS_HELP_STRING([--with-getrandom],
198 [enforce the use of getrandom function in the system @<:@default=check@:>@])
199 AS_HELP_STRING([--without-getrandom],
200 [skip auto detect of getrandom @<:@default=check@:>@])],
202 [with_getrandom=check])
204 AS_IF([test "x$with_getrandom" != xno],
205 [AC_MSG_CHECKING([for getrandom (Linux 3.17+, glibc 2.25+)])
206 AC_LINK_IFELSE([AC_LANG_SOURCE([
207 #include <stdlib.h> /* for NULL */
208 #include <sys/random.h>
210 return getrandom(NULL, 0U, 0U);
213 [AC_DEFINE([HAVE_GETRANDOM], [1], [Define to 1 if you have the `getrandom' function.])
214 AC_MSG_RESULT([yes])],
216 AS_IF([test "x$with_getrandom" = xyes],
217 [AC_MSG_ERROR([enforced the use of getrandom --with-getrandom, but not detected])])])])
219 AC_ARG_WITH([sys_getrandom],
220 [AS_HELP_STRING([--with-sys-getrandom],
221 [enforce the use of syscall SYS_getrandom function in the system @<:@default=check@:>@])
222 AS_HELP_STRING([--without-sys-getrandom],
223 [skip auto detect of syscall SYS_getrandom @<:@default=check@:>@])],
225 [with_sys_getrandom=check])
227 AS_IF([test "x$with_sys_getrandom" != xno],
228 [AC_MSG_CHECKING([for syscall SYS_getrandom (Linux 3.17+)])
229 AC_LINK_IFELSE([AC_LANG_SOURCE([
230 #include <stdlib.h> /* for NULL */
231 #include <unistd.h> /* for syscall */
232 #include <sys/syscall.h> /* for SYS_getrandom */
234 syscall(SYS_getrandom, NULL, 0, 0);
238 [AC_DEFINE([HAVE_SYSCALL_GETRANDOM], [1], [Define to 1 if you have `syscall' and `SYS_getrandom'.])
239 AC_MSG_RESULT([yes])],
241 AS_IF([test "x$with_sys_getrandom" = xyes],
242 [AC_MSG_ERROR([enforced the use of syscall SYS_getrandom --with-sys-getrandom, but not detected])])])])
244 dnl Only needed for xmlwf:
245 AC_CHECK_HEADERS(fcntl.h unistd.h)
249 AS_IF([test "$ac_cv_func_mmap_fixed_mapped" = "yes"],
250 [AS_VAR_SET(FILEMAP,unixfilemap)],
251 [AS_VAR_SET(FILEMAP,readfilemap)])
255 dnl Some basic configuration:
256 AC_DEFINE([XML_NS], 1,
257 [Define to make XML Namespaces functionality available.])
258 AC_DEFINE([XML_DTD], 1,
259 [Define to make parameter entity parsing functionality available.])
260 AC_DEFINE([XML_DEV_URANDOM], 1,
261 [Define to include code reading entropy from `/dev/urandom'.])
263 AC_ARG_ENABLE([xml-attr-info],
264 [AS_HELP_STRING([--enable-xml-attr-info],
265 [Enable retrieving the byte offsets for attribute names and values @<:@default=no@:>@])],
267 [enable_xml_attr_info=no])
268 AS_IF([test "x${enable_xml_attr_info}" = "xyes"],
269 [AC_DEFINE([XML_ATTR_INFO], 1,
270 [Define to allow retrieving the byte offsets for attribute names and values.])])
272 AC_ARG_ENABLE([xml-context],
273 AS_HELP_STRING([--enable-xml-context @<:@COUNT@:>@],
274 [Retain context around the current parse point;
275 default is enabled and a size of 1024 bytes])
276 AS_HELP_STRING([--disable-xml-context],
277 [Do not retain context around the current parse point]),
278 [enable_xml_context=${enableval}])
279 AS_IF([test "x${enable_xml_context}" != "xno"],
280 [AS_IF([test "x${enable_xml_context}" = "xyes" \
281 -o "x${enable_xml_context}" = "x"],
282 [AS_VAR_SET(enable_xml_context,1024)])
283 AC_DEFINE_UNQUOTED([XML_CONTEXT_BYTES], [${enable_xml_context}],
284 [Define to specify how much context to retain around the current parse point.])])
286 AC_ARG_WITH([docbook],
287 [AS_HELP_STRING([--with-docbook],
288 [enforce XML to man page compilation @<:@default=check@:>@])
289 AS_HELP_STRING([--without-docbook],
290 [skip XML to man page compilation @<:@default=check@:>@])],
292 [with_docbook=check])
294 AC_ARG_VAR([DOCBOOK_TO_MAN], [docbook2x-man command])
295 AS_IF([test "x$with_docbook" != xno],
296 [AC_CHECK_PROGS([DOCBOOK_TO_MAN], [docbook2x-man db2x_docbook2man docbook2man docbook-to-man])])
297 AS_IF([test "x${DOCBOOK_TO_MAN}" = x -a "x$with_docbook" = xyes],
298 [AC_MSG_ERROR([Required program 'docbook2x-man' not found.])])
299 AS_IF([test "x${DOCBOOK_TO_MAN}" != x -a "x$with_docbook" != xno],
300 [AS_IF([${DOCBOOK_TO_MAN} --help | grep -i -q -F sgmlbase],
301 [AC_MSG_ERROR([Your local ${DOCBOOK_TO_MAN} was found to work with SGML rather
302 than XML. Please install docbook2X and use variable DOCBOOK_TO_MAN to point
303 configure to command docbook2x-man of docbook2X.
304 Or use DOCBOOK_TO_MAN="xmlto man --skip-validation" if you have xmlto around.
305 You can also configure using --without-docbook if you can do without a man
306 page for xmlwf.])])])
308 AM_CONDITIONAL(WITH_DOCBOOK, [test "x${DOCBOOK_TO_MAN}" != x])
310 AC_CONFIG_FILES([Makefile]
316 [tests/benchmark/Makefile]
318 AC_CONFIG_FILES([run.sh], [chmod +x run.sh])