1 dnl configuration script for expat
2 dnl Process this file with autoconf to produce a configure script.
4 dnl ___\ \/ /_ __ __ _| |_
5 dnl / _ \\ /| '_ \ / _` | __|
6 dnl | __// \| |_) | (_| | |_
7 dnl \___/_/\_\ .__/ \__,_|\__|
10 dnl Copyright (c) 2000 Clark Cooper <coopercc@users.sourceforge.net>
11 dnl Copyright (c) 2000-2005 Fred L. Drake, Jr. <fdrake@users.sourceforge.net>
12 dnl Copyright (c) 2001-2003 Greg Stein <gstein@users.sourceforge.net>
13 dnl Copyright (c) 2006-2012 Karl Waclawek <karl@waclawek.net>
14 dnl Copyright (c) 2016-2022 Sebastian Pipping <sebastian@pipping.org>
15 dnl Copyright (c) 2017 S. P. Zeidler <spz@netbsd.org>
16 dnl Copyright (c) 2017 Stephen Groat <stephen@groat.us>
17 dnl Copyright (c) 2017-2020 Joe Orton <jorton@redhat.com>
18 dnl Copyright (c) 2018 Yury Gribov <tetra2005@gmail.com>
19 dnl Copyright (c) 2018 Benjamin Peterson <benjamin@python.org>
20 dnl Copyright (c) 2018 Marco Maggi <marco.maggi-ipsu@poste.it>
21 dnl Copyright (c) 2018 KangLin <kl222@126.com>
22 dnl Copyright (c) 2019 Mohammed Khajapasha <mohammed.khajapasha@intel.com>
23 dnl Copyright (c) 2019 Kishore Kunche <kishore.kunche@intel.com>
24 dnl Copyright (c) 2020 Jeffrey Walton <noloader@gmail.com>
25 dnl Licensed under the MIT license:
27 dnl Permission is hereby granted, free of charge, to any person obtaining
28 dnl a copy of this software and associated documentation files (the
29 dnl "Software"), to deal in the Software without restriction, including
30 dnl without limitation the rights to use, copy, modify, merge, publish,
31 dnl distribute, sublicense, and/or sell copies of the Software, and to permit
32 dnl persons to whom the Software is furnished to do so, subject to the
33 dnl following conditions:
35 dnl The above copyright notice and this permission notice shall be included
36 dnl in all copies or substantial portions of the Software.
38 dnl THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
39 dnl EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
40 dnl MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
41 dnl NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
42 dnl DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
43 dnl OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
44 dnl USE OR OTHER DEALINGS IN THE SOFTWARE.
46 dnl Ensure that Expat is configured with autoconf 2.69 or newer.
49 dnl Get the version number of Expat, using m4's esyscmd() command to run
50 dnl the command at m4-generation time. This allows us to create an m4
51 dnl symbol holding the correct version number. AC_INIT requires the
52 dnl version number at m4-time, rather than when ./configure is run, so
53 dnl all this must happen as part of m4, not as part of the shell code
54 dnl contained in ./configure.
56 dnl NOTE: esyscmd() is a GNU M4 extension. Thus, we wrap it in an appropriate
57 dnl test. I believe this test will work, but I don't have a place with non-
58 dnl GNU M4 to test it right now.
59 m4_define([expat_version],
61 [esyscmd(conftools/get-version.sh lib/expat.h)],
63 AC_INIT([expat], expat_version, [expat-bugs@libexpat.org])
64 m4_undefine([expat_version])
66 AC_CONFIG_SRCDIR([Makefile.in])
67 AC_CONFIG_AUX_DIR([conftools])
68 AC_CONFIG_MACRO_DIR([m4])
74 dnl Increment LIBREVISION if source code has changed at all
76 dnl If the API has changed, increment LIBCURRENT and set LIBREVISION to 0
78 dnl If the API changes compatibly (i.e. simply adding a new function
79 dnl without changing or removing earlier interfaces), then increment LIBAGE.
81 dnl If the API changes incompatibly set LIBAGE back to 0
86 LIBAGE=8 # CMakeLists.txt!
88 AC_CONFIG_HEADERS([expat_config.h])
105 AS_IF([test "$GCC" = yes],
106 [AX_APPEND_COMPILE_FLAGS([-Wall -Wextra], [AM_CFLAGS])
107 dnl Be careful about adding the -fexceptions option; some versions of
108 dnl GCC don't support it and it causes extra warnings that are only
109 dnl distracting; avoid.
110 AX_APPEND_COMPILE_FLAGS([-fexceptions], [AM_CFLAGS])
111 AX_APPEND_COMPILE_FLAGS([-fno-strict-aliasing -Wmissing-prototypes -Wstrict-prototypes], [AM_CFLAGS])
112 AX_APPEND_COMPILE_FLAGS([-pedantic -Wduplicated-cond -Wduplicated-branches -Wlogical-op], [AM_CFLAGS])
113 AX_APPEND_COMPILE_FLAGS([-Wrestrict -Wnull-dereference -Wjump-misses-init -Wdouble-promotion], [AM_CFLAGS])
114 AX_APPEND_COMPILE_FLAGS([-Wshadow -Wformat=2 -Wno-pedantic-ms-format -Wmisleading-indentation], [AM_CFLAGS])])
119 AS_IF([test "$GCC" = yes],
120 [AX_APPEND_COMPILE_FLAGS([-Wall -Wextra], [AM_CXXFLAGS])
121 dnl Be careful about adding the -fexceptions option; some versions of
122 dnl GCC don't support it and it causes extra warnings that are only
123 dnl distracting; avoid.
124 AX_APPEND_COMPILE_FLAGS([-fexceptions], [AM_CXXFLAGS])
125 AX_APPEND_COMPILE_FLAGS([-fno-strict-aliasing], [AM_CXXFLAGS])])
128 AS_IF([test "$GCC" = yes],
129 [AX_APPEND_LINK_FLAGS([-fno-strict-aliasing],[AM_LDFLAGS])])
131 dnl patching ${archive_cmds} to affect generation of file "libtool" to fix linking with clang (issue #312)
132 AS_CASE(["$LD"],[*clang*],
133 [AS_CASE(["${host_os}"],
134 [*linux*],[archive_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'])])
136 EXPATCFG_COMPILER_SUPPORTS_VISIBILITY([
137 AX_APPEND_FLAG([-fvisibility=hidden], [AM_CFLAGS])
138 AX_APPEND_FLAG([-DXML_ENABLE_VISIBILITY=1], [AM_CPPFLAGS])])
140 dnl Checks for typedefs, structures, and compiler characteristics.
142 dnl We define BYTEORDER to 1234 when the platform is little endian; it
143 dnl defines it to 4321 when the platform is big endian. We also define
144 dnl WORDS_BIGENDIAN to 1 when the platform is big endian.
146 dnl A long time ago (early 2000 years) AC_C_BIGENDIAN was considered
147 dnl wrong when cross compiling, now (2018, GNU Autoconf 2.69) we assume
149 AC_C_BIGENDIAN([AC_DEFINE([WORDS_BIGENDIAN], 1)
150 AS_VAR_SET([BYTEORDER], 4321)],
151 [AS_VAR_SET([BYTEORDER], 1234)])
152 AC_DEFINE_UNQUOTED([BYTEORDER], $BYTEORDER, [1234 = LILENDIAN, 4321 = BIGENDIAN])
158 [AS_HELP_STRING([--without-xmlwf], [do not build xmlwf])],
161 AM_CONDITIONAL([WITH_XMLWF], [test x${with_xmlwf} = xyes])
163 AC_ARG_WITH([examples],
164 [AS_HELP_STRING([--without-examples], [do not build examples @<:@default=included@:>@])],
167 AM_CONDITIONAL([WITH_EXAMPLES], [test x${with_examples} = xyes])
170 [AS_HELP_STRING([--without-tests], [do not build tests @<:@default=included@:>@])],
173 AM_CONDITIONAL([WITH_TESTS], [test x${with_tests} = xyes])
176 AS_VAR_SET([EXPATCFG_ON_MINGW],[no])
177 AS_CASE("${host_os}",
179 [AS_VAR_SET([EXPATCFG_ON_MINGW],[yes])
180 AC_MSG_NOTICE([detected OS: MinGW])])
181 AM_CONDITIONAL([MINGW], [test x${EXPATCFG_ON_MINGW} = xyes])
183 dnl Note: Prefix "_INTERNAL_" here means exclusive use inside of file configure.ac
184 AM_CONDITIONAL([UNICODE], [echo -- "${CPPFLAGS}${CFLAGS}" | ${FGREP} XML_UNICODE >/dev/null])
185 AM_CONDITIONAL([_INTERNAL_UNICODE_WCHAR_T], [echo -- "${CPPFLAGS}${CFLAGS}" | ${FGREP} XML_UNICODE_WCHAR_T >/dev/null])
186 AM_CONDITIONAL([_INTERNAL_MIN_SIZE], [echo -- "${CPPFLAGS}${CFLAGS}" | ${FGREP} XML_MIN_SIZE >/dev/null])
187 AM_CONDITIONAL([_INTERNAL_LARGE_SIZE], [echo -- "${CPPFLAGS}${CFLAGS}" | ${FGREP} XML_LARGE_SIZE >/dev/null])
191 AC_ARG_WITH([libbsd],
192 [AS_HELP_STRING([--with-libbsd], [utilize libbsd (for arc4random_buf)])],
195 AS_IF([test "x${with_libbsd}" != xno],
199 [AS_IF([test "x${with_libbsd}" = xyes],
200 [AC_MSG_ERROR([Enforced use of libbsd cannot be satisfied.])])])])
201 AC_MSG_CHECKING([for arc4random_buf (BSD or libbsd)])
202 AC_LINK_IFELSE([AC_LANG_SOURCE([
203 #include <stdlib.h> /* for arc4random_buf on BSD, for NULL */
204 #if defined(HAVE_LIBBSD)
205 # include <bsd/stdlib.h>
208 arc4random_buf(NULL, 0U);
212 [AC_DEFINE([HAVE_ARC4RANDOM_BUF], [1], [Define to 1 if you have the `arc4random_buf' function.])
213 AC_MSG_RESULT([yes])],
216 AC_MSG_CHECKING([for arc4random (BSD, macOS or libbsd)])
217 AC_LINK_IFELSE([AC_LANG_SOURCE([
218 #if defined(HAVE_LIBBSD)
219 # include <bsd/stdlib.h>
228 [AC_DEFINE([HAVE_ARC4RANDOM], [1], [Define to 1 if you have the `arc4random' function.])
229 AC_MSG_RESULT([yes])],
230 [AC_MSG_RESULT([no])])])
232 AC_ARG_WITH([getrandom],
233 [AS_HELP_STRING([--with-getrandom],
234 [enforce the use of getrandom function in the system @<:@default=check@:>@])
235 AS_HELP_STRING([--without-getrandom],
236 [skip auto detect of getrandom @<:@default=check@:>@])],
238 [with_getrandom=check])
240 AS_IF([test "x$with_getrandom" != xno],
241 [AC_MSG_CHECKING([for getrandom (Linux 3.17+, glibc 2.25+)])
242 AC_LINK_IFELSE([AC_LANG_SOURCE([
243 #include <stdlib.h> /* for NULL */
244 #include <sys/random.h>
246 return getrandom(NULL, 0U, 0U);
249 [AC_DEFINE([HAVE_GETRANDOM], [1], [Define to 1 if you have the `getrandom' function.])
250 AC_MSG_RESULT([yes])],
252 AS_IF([test "x$with_getrandom" = xyes],
253 [AC_MSG_ERROR([enforced the use of getrandom --with-getrandom, but not detected])])])])
255 AC_ARG_WITH([sys_getrandom],
256 [AS_HELP_STRING([--with-sys-getrandom],
257 [enforce the use of syscall SYS_getrandom function in the system @<:@default=check@:>@])
258 AS_HELP_STRING([--without-sys-getrandom],
259 [skip auto detect of syscall SYS_getrandom @<:@default=check@:>@])],
261 [with_sys_getrandom=check])
263 AS_IF([test "x$with_sys_getrandom" != xno],
264 [AC_MSG_CHECKING([for syscall SYS_getrandom (Linux 3.17+)])
265 AC_LINK_IFELSE([AC_LANG_SOURCE([
266 #include <stdlib.h> /* for NULL */
267 #include <unistd.h> /* for syscall */
268 #include <sys/syscall.h> /* for SYS_getrandom */
270 syscall(SYS_getrandom, NULL, 0, 0);
274 [AC_DEFINE([HAVE_SYSCALL_GETRANDOM], [1], [Define to 1 if you have `syscall' and `SYS_getrandom'.])
275 AC_MSG_RESULT([yes])],
277 AS_IF([test "x$with_sys_getrandom" = xyes],
278 [AC_MSG_ERROR([enforced the use of syscall SYS_getrandom --with-sys-getrandom, but not detected])])])])
280 dnl Only needed for xmlwf:
281 AC_CHECK_HEADERS(fcntl.h unistd.h)
285 AS_IF([test "$ac_cv_func_mmap_fixed_mapped" = "yes"],
286 [AS_VAR_SET(FILEMAP,unixfilemap)],
287 [AS_VAR_SET(FILEMAP,readfilemap)])
291 dnl Some basic configuration:
292 AC_DEFINE([XML_NS], 1,
293 [Define to make XML Namespaces functionality available.])
294 AC_DEFINE([XML_DTD], 1,
295 [Define to make parameter entity parsing functionality available.])
296 AC_DEFINE([XML_DEV_URANDOM], 1,
297 [Define to include code reading entropy from `/dev/urandom'.])
299 AC_ARG_ENABLE([xml-attr-info],
300 [AS_HELP_STRING([--enable-xml-attr-info],
301 [Enable retrieving the byte offsets for attribute names and values @<:@default=no@:>@])],
303 [enable_xml_attr_info=no])
304 AS_IF([test "x${enable_xml_attr_info}" = "xyes"],
305 [AC_DEFINE([XML_ATTR_INFO], 1,
306 [Define to allow retrieving the byte offsets for attribute names and values.])])
308 AC_ARG_ENABLE([xml-context],
309 AS_HELP_STRING([--enable-xml-context @<:@COUNT@:>@],
310 [Retain context around the current parse point;
311 default is enabled and a size of 1024 bytes])
312 AS_HELP_STRING([--disable-xml-context],
313 [Do not retain context around the current parse point]),
314 [enable_xml_context=${enableval}])
315 AS_IF([test "x${enable_xml_context}" != "xno"],
316 [AS_IF([test "x${enable_xml_context}" = "xyes" \
317 -o "x${enable_xml_context}" = "x"],
318 [AS_VAR_SET(enable_xml_context,1024)])
319 AC_DEFINE_UNQUOTED([XML_CONTEXT_BYTES], [${enable_xml_context}],
320 [Define to specify how much context to retain around the current parse point.])])
322 AC_ARG_WITH([docbook],
323 [AS_HELP_STRING([--with-docbook],
324 [enforce XML to man page compilation @<:@default=check@:>@])
325 AS_HELP_STRING([--without-docbook],
326 [skip XML to man page compilation @<:@default=check@:>@])],
328 [with_docbook=check])
330 AC_ARG_VAR([DOCBOOK_TO_MAN], [docbook2x-man command])
331 AS_IF([test "x$with_docbook" != xno],
332 [AC_CHECK_PROGS([DOCBOOK_TO_MAN], [docbook2x-man db2x_docbook2man docbook2man docbook-to-man])])
333 AS_IF([test "x${DOCBOOK_TO_MAN}" = x -a "x$with_docbook" = xyes],
334 [AC_MSG_ERROR([Required program 'docbook2x-man' not found.])])
335 AS_IF([test "x${DOCBOOK_TO_MAN}" != x -a "x$with_docbook" != xno],
336 [AS_IF([${DOCBOOK_TO_MAN} --help | grep -i -q -F sgmlbase],
337 [AC_MSG_ERROR([Your local ${DOCBOOK_TO_MAN} was found to work with SGML rather
338 than XML. Please install docbook2X and use variable DOCBOOK_TO_MAN to point
339 configure to command docbook2x-man of docbook2X.
340 Or use DOCBOOK_TO_MAN="xmlto man --skip-validation" if you have xmlto around.
341 You can also configure using --without-docbook if you can do without a man
342 page for xmlwf.])])])
344 AM_CONDITIONAL(WITH_DOCBOOK, [test "x${DOCBOOK_TO_MAN}" != x])
347 dnl Configure CMake file templates
348 dnl NOTE: The *_TRUE variables read here are Automake conditionals
349 dnl that are either set to "" when enabled or to "#" when disabled
350 dnl (because they are used to dynamically comment out certain things)
351 AS_IF([test "x${enable_xml_attr_info}" = xyes],
352 [EXPAT_ATTR_INFO=ON],
353 [EXPAT_ATTR_INFO=OFF])
355 AS_IF([test "x${_INTERNAL_LARGE_SIZE_TRUE}" = x],
356 [EXPAT_LARGE_SIZE=ON],
357 [EXPAT_LARGE_SIZE=OFF])
358 AS_IF([test "x${_INTERNAL_MIN_SIZE_TRUE}" = x],
360 [EXPAT_MIN_SIZE=OFF])
362 AS_IF([test "x${enable_xml_context}" != xno],
363 [EXPAT_CONTEXT_BYTES=${enable_xml_context}],
364 [EXPAT_CONTEXT_BYTES=OFF])
365 AS_IF([test "x${UNICODE_TRUE}" = x],
367 [test "x${_INTERNAL_UNICODE_WCHAR_T_TRUE}" = x],
368 [EXPAT_CHAR_TYPE=wchar_t],
369 [EXPAT_CHAR_TYPE=ushort])],
370 [EXPAT_CHAR_TYPE=char])
371 PACKAGE_INIT="${srcdir}"/cmake/autotools/expat-package-init.cmake
372 LIBDIR_BASENAME="$(basename "${libdir}")"
373 SO_MAJOR="$(expr "${LIBCURRENT}" - "${LIBAGE}")"
375 SO_PATCH="${LIBREVISION}"
376 AC_CHECK_SIZEOF([void *]) # sets ac_cv_sizeof_void_p
377 AC_SUBST([EXPAT_ATTR_INFO])
378 AC_SUBST([EXPAT_DTD])
379 AC_SUBST([EXPAT_LARGE_SIZE])
380 AC_SUBST([EXPAT_MIN_SIZE])
382 AC_SUBST([EXPAT_CONTEXT_BYTES])
383 AC_SUBST([EXPAT_CHAR_TYPE])
384 AC_SUBST_FILE([PACKAGE_INIT])
385 AC_SUBST([LIBDIR_BASENAME])
389 AC_SUBST([ac_cv_sizeof_void_p])
392 dnl write the Automake flags we set
393 AC_SUBST([AM_CPPFLAGS])
394 AC_SUBST([AM_CFLAGS])
395 AC_SUBST([AM_CXXFLAGS])
396 AC_SUBST([AM_LDFLAGS])
398 dnl Emulate the use of CMAKE_SHARED_LIBRARY_PREFIX under CMake
399 AC_MSG_CHECKING([for shared library name prefix])
400 AS_CASE("${host_os}",
401 [cygwin*], [CMAKE_SHARED_LIBRARY_PREFIX=cyg],
402 [CMAKE_SHARED_LIBRARY_PREFIX=lib])
403 AC_MSG_RESULT([${CMAKE_SHARED_LIBRARY_PREFIX}])
404 AC_SUBST([CMAKE_SHARED_LIBRARY_PREFIX])
406 AS_CASE("${host_os}",
407 [darwin*], [CMAKE_NOCONFIG_SOURCE=cmake/autotools/expat-noconfig__macos.cmake.in],
408 [mingw*|cygwin*], [CMAKE_NOCONFIG_SOURCE=cmake/autotools/expat-noconfig__windows.cmake.in],
409 [CMAKE_NOCONFIG_SOURCE=cmake/autotools/expat-noconfig__linux.cmake.in])
410 AC_CONFIG_FILES([Makefile]
412 [cmake/expat-config.cmake]
413 [cmake/autotools/expat-config-version.cmake]
414 [cmake/autotools/expat-noconfig.cmake:${CMAKE_NOCONFIG_SOURCE}]
419 [tests/benchmark/Makefile]
421 AC_CONFIG_FILES([run.sh], [chmod +x run.sh])
427 Automake flags (can be overridden by user flags):
428 [AM_CPPFLAGS]: ${AM_CPPFLAGS}
429 [AM_CFLAGS]: ${AM_CFLAGS}
430 [AM_CXXFLAGS]: ${AM_CXXFLAGS}
431 [AM_LDFLAGS]: ${AM_LDFLAGS}
433 User flags (override Automake flags on conflict):
434 CPPFLAGS: ${CPPFLAGS}
436 CXXFLAGS: ${CXXFLAGS}
437 LDFLAGS: ${LDFLAGS}])