configure.ac - platform/external/expat - Git at Google

 dnl   configuration script for expat
 dnl   Process this file with autoconf to produce a configure script.
 dnl
 dnl   Copyright 2000 Clark Cooper
 dnl
 dnl   This file is part of EXPAT.
 dnl
 dnl   EXPAT is free software; you can redistribute it and/or modify it
 dnl   under the terms of the License (based on the MIT/X license) contained
 dnl   in the file COPYING that comes with this distribution.
 dnl

 dnl Ensure that Expat is configured with autoconf 2.69 or newer.
 AC_PREREQ(2.69)

 dnl Get the version number of Expat, using m4's esyscmd() command to run
 dnl the command at m4-generation time. This allows us to create an m4
 dnl symbol holding the correct version number. AC_INIT() requires the
 dnl version number at m4-time, rather than when ./configure is run, so
 dnl all this must happen as part of m4, not as part of the shell code
 dnl contained in ./configure.
 dnl
 dnl NOTE: esyscmd() is a GNU M4 extension. Thus, we wrap it in an appropriate
 dnl test. I believe this test will work, but I don't have a place with non-
 dnl GNU M4 to test it right now.
 m4_define([expat_version],
   m4_ifdef([__gnu__],
            [esyscmd(conftools/get-version.sh lib/expat.h)],
            [2.2.x]))
 AC_INIT(expat, expat_version, expat-bugs@libexpat.org)
 m4_undefine([expat_version])

 AC_CONFIG_SRCDIR([Makefile.in])
 AC_CONFIG_AUX_DIR([conftools])
 AC_CONFIG_MACRO_DIR([m4])
 AM_INIT_AUTOMAKE


 dnl
 dnl Increment LIBREVISION if source code has changed at all
 dnl
 dnl If the API has changed, increment LIBCURRENT and set LIBREVISION to 0
 dnl
 dnl If the API changes compatibly (i.e. simply adding a new function
 dnl without changing or removing earlier interfaces), then increment LIBAGE.
 dnl
 dnl If the API changes incompatibly set LIBAGE back to 0
 dnl

 LIBCURRENT=7   # sync
 LIBREVISION=9  # with
 LIBAGE=6       # CMakeLists.txt!

 AX_APPEND_FLAG([-DHAVE_EXPAT_CONFIG_H], [CPPFLAGS])
 AC_CONFIG_HEADER([expat_config.h])

 AM_PROG_AR
 AC_PROG_INSTALL
 AC_PROG_LN_S
 AC_PROG_MAKE_SET

 LT_PREREQ([2.4])
 LT_INIT([win32-dll])

 AC_SUBST(LIBCURRENT)
 AC_SUBST(LIBREVISION)
 AC_SUBST(LIBAGE)

 AC_LANG([C])
 AC_PROG_CC_C99
 AS_IF([test "$GCC" = yes],
   [AX_APPEND_COMPILE_FLAGS([-Wall -Wextra], [CFLAGS])
    dnl Be careful about adding the -fexceptions option; some versions of
    dnl GCC don't support it and it causes extra warnings that are only
    dnl distracting; avoid.
    AX_APPEND_COMPILE_FLAGS([-fexceptions], [CFLAGS])
    AX_APPEND_COMPILE_FLAGS([-fno-strict-aliasing -Wmissing-prototypes -Wstrict-prototypes], [CFLAGS])
    AX_APPEND_COMPILE_FLAGS([-pedantic -Wduplicated-cond -Wduplicated-branches -Wlogical-op], [CFLAGS])
    AX_APPEND_COMPILE_FLAGS([-Wrestrict -Wnull-dereference -Wjump-misses-init -Wdouble-promotion], [CFLAGS])
    AX_APPEND_COMPILE_FLAGS([-Wshadow -Wformat=2 -Wmisleading-indentation], [CFLAGS])])

 AC_LANG_PUSH([C++])
 AC_PROG_CXX
 AS_IF([test "$GCC" = yes],
   [AX_APPEND_COMPILE_FLAGS([-Wall -Wextra], [CXXFLAGS])
    dnl Be careful about adding the -fexceptions option; some versions of
    dnl GCC don't support it and it causes extra warnings that are only
    dnl distracting; avoid.
    AX_APPEND_COMPILE_FLAGS([-fexceptions], [CXXFLAGS])
    AX_APPEND_COMPILE_FLAGS([-fno-strict-aliasing], [CXXFLAGS])])
 AC_LANG_POP([C++])

 AS_IF([test "$GCC" = yes],
   [AX_APPEND_LINK_FLAGS([-fno-strict-aliasing],[LDFLAGS])])

 EXPATCFG_COMPILER_SUPPORTS_VISIBILITY([
   AX_APPEND_FLAG([-fvisibility=hidden],       [CFLAGS])
   AX_APPEND_FLAG([-DXML_ENABLE_VISIBILITY=1], [CFLAGS])])

 dnl Checks for header files.
 AC_HEADER_STDC

 dnl Checks for typedefs, structures, and compiler characteristics.

 dnl We define BYTEORDER to 1234 when the platform is little endian; it
 dnl defines it to 4321 when the  platform is big endian.  We also define
 dnl WORDS_BIGENDIAN to 1 when the platform is big endian.
 dnl
 dnl A  long time  ago (early 2000  years) AC_C_BIGENDIAN  was considered
 dnl wrong when cross compiling, now (2018, GNU Autoconf 2.69) we assume
 dnl it is fine.
 AC_C_BIGENDIAN([AC_DEFINE([WORDS_BIGENDIAN], 1)
                 AS_VAR_SET([BYTEORDER], 4321)],
                [AS_VAR_SET([BYTEORDER], 1234)])
 AC_DEFINE_UNQUOTED([BYTEORDER], $BYTEORDER, [1234 = LILENDIAN, 4321 = BIGENDIAN])

 AC_C_CONST
 AC_TYPE_SIZE_T

 AC_ARG_WITH([xmlwf],
   [AS_HELP_STRING([--without-xmlwf], [do not build xmlwf])], [],
   [with_xmlwf=yes])
 AM_CONDITIONAL([WITH_XMLWF], [test x${with_xmlwf} = xyes])

 AC_ARG_WITH([examples], [
 AS_HELP_STRING([--without-examples], [do not build examples @<:@default=included@:>@])], [], [with_examples=yes])
 AM_CONDITIONAL([WITH_EXAMPLES], [test x${with_examples} = xyes])

 AC_ARG_WITH([tests], [
 AS_HELP_STRING([--without-tests], [do not build tests @<:@default=included@:>@])], [], [with_tests=yes])
 AM_CONDITIONAL([WITH_TESTS], [test x${with_tests} = xyes])

 AM_CONDITIONAL([MINGW], [echo -- "${host}" | ${FGREP} mingw >/dev/null])
 AM_CONDITIONAL([UNICODE], [echo -- "${CPPFLAGS}${CFLAGS}" | ${FGREP} XML_UNICODE >/dev/null])


 AC_ARG_WITH([libbsd],
   [AS_HELP_STRING([--with-libbsd], [utilize libbsd (for arc4random_buf)])],
   [],
   [with_libbsd=no])
 AS_IF([test "x${with_libbsd}" != xno],
   [AC_CHECK_LIB([bsd],
      [arc4random_buf],
      [],
      [AS_IF([test "x${with_libbsd}" = xyes],
             [AC_MSG_ERROR([Enforced use of libbsd cannot be satisfied.])])])])
 AC_MSG_CHECKING([for arc4random_buf (BSD or libbsd)])
 AC_LINK_IFELSE([AC_LANG_SOURCE([
   #include <stdlib.h>  /* for arc4random_buf on BSD, for NULL */
   #if defined(HAVE_LIBBSD)
   # include <bsd/stdlib.h>
   #endif
   int main() {
     arc4random_buf(NULL, 0U);
     return 0;
   }
 ])],
   [AC_DEFINE([HAVE_ARC4RANDOM_BUF], [1], [Define to 1 if you have the `arc4random_buf' function.])
    AC_MSG_RESULT([yes])],
   [AC_MSG_RESULT([no])

    AC_MSG_CHECKING([for arc4random (BSD, macOS or libbsd)])
    AC_LINK_IFELSE([AC_LANG_SOURCE([
       #if defined(HAVE_LIBBSD)
       # include <bsd/stdlib.h>
       #else
       # include <stdlib.h>
       #endif
       int main() {
           arc4random();
           return 0;
       }
      ])],
      [AC_DEFINE([HAVE_ARC4RANDOM], [1], [Define to 1 if you have the `arc4random' function.])
       AC_MSG_RESULT([yes])],
      [AC_MSG_RESULT([no])])])


 AC_MSG_CHECKING([for getrandom (Linux 3.17+, glibc 2.25+)])
 AC_LINK_IFELSE([AC_LANG_SOURCE([
   #include <stdlib.h>  /* for NULL */
   #include <sys/random.h>
   int main() {
     return getrandom(NULL, 0U, 0U);
   }
   ])],
   [AC_DEFINE([HAVE_GETRANDOM], [1], [Define to 1 if you have the `getrandom' function.])
    AC_MSG_RESULT([yes])],
   [AC_MSG_RESULT([no])

    AC_MSG_CHECKING([for syscall SYS_getrandom (Linux 3.17+)])
    AC_LINK_IFELSE([AC_LANG_SOURCE([
       #include <stdlib.h>  /* for NULL */
       #include <unistd.h>  /* for syscall */
       #include <sys/syscall.h>  /* for SYS_getrandom */
       int main() {
         syscall(SYS_getrandom, NULL, 0, 0);
         return 0;
       }
    ])],
    [AC_DEFINE([HAVE_SYSCALL_GETRANDOM], [1], [Define to 1 if you have `syscall' and `SYS_getrandom'.])
     AC_MSG_RESULT([yes])],
    [AC_MSG_RESULT([no])])])


 dnl Only needed for xmlwf:
 AC_CHECK_HEADERS(fcntl.h unistd.h)
 AC_TYPE_OFF_T
 AC_FUNC_MMAP

 AS_IF([test "$ac_cv_func_mmap_fixed_mapped" = "yes"],
   [AS_VAR_SET(FILEMAP,unixfilemap)],
   [AS_VAR_SET(FILEMAP,readfilemap)])
 AC_SUBST(FILEMAP)


 dnl Some basic configuration:
 AC_DEFINE([XML_NS], 1,
           [Define to make XML Namespaces functionality available.])
 AC_DEFINE([XML_DTD], 1,
           [Define to make parameter entity parsing functionality available.])
 AC_DEFINE([XML_DEV_URANDOM], 1,
           [Define to include code reading entropy from `/dev/urandom'.])

 AC_ARG_ENABLE([xml-context],
   AS_HELP_STRING([--enable-xml-context @<:@COUNT@:>@],
     [Retain context around the current parse point;
      default is enabled and a size of 1024 bytes])
 AS_HELP_STRING([--disable-xml-context],
     [Do not retain context around the current parse point]),
     [enable_xml_context=${enableval}])
 AS_IF([test "x${enable_xml_context}" != "xno"],
   [AS_IF([test "x${enable_xml_context}" = "xyes" \
             -o "x${enable_xml_context}" = "x"],
      [AS_VAR_SET(enable_xml_context,1024)])
    AC_DEFINE_UNQUOTED([XML_CONTEXT_BYTES], [${enable_xml_context}],
      [Define to specify how much context to retain around the current parse point.])])

 AC_ARG_WITH([docbook],
   [AS_HELP_STRING([--with-docbook],
                   [enforce XML to man page compilation @<:@default=check@:>@])
 AS_HELP_STRING([--without-docbook],
                [skip XML to man page compilation @<:@default=check@:>@])], [],
                [with_docbook=check])

 AC_ARG_VAR([DOCBOOK_TO_MAN], [docbook2x-man command])
 AS_IF([test "x$with_docbook" != xno],
   [AC_CHECK_PROGS([DOCBOOK_TO_MAN], [docbook2x-man db2x_docbook2man docbook2man docbook-to-man])])
 AS_IF([test "x${DOCBOOK_TO_MAN}" = x -a "x$with_docbook" = xyes],
   [AC_MSG_ERROR([Required program 'docbook2x-man' not found.])])
 AS_IF([test "x${DOCBOOK_TO_MAN}" != x -a "x$with_docbook" != xno],
   [AS_IF([${DOCBOOK_TO_MAN} --help | grep -i -q -F sgmlbase],
     [AC_MSG_ERROR([Your local ${DOCBOOK_TO_MAN} was found to work with SGML rather
   than XML. Please install docbook2X and use variable DOCBOOK_TO_MAN to point
   configure to command docbook2x-man of docbook2X.
   Or use DOCBOOK_TO_MAN="xmlto man --skip-validation" if you have xmlto around.
   You can also configure using --without-docbook if you can do without a man
   page for xmlwf.])])])

 AM_CONDITIONAL(WITH_DOCBOOK, [test "x${DOCBOOK_TO_MAN}" != x])

 AC_CONFIG_FILES([Makefile]
   [expat.pc]
   [doc/Makefile]
   [examples/Makefile]
   [lib/Makefile]
   [tests/Makefile]
   [tests/benchmark/Makefile]
   [xmlwf/Makefile])
 AC_CONFIG_FILES([run.sh], [chmod +x run.sh])
 AC_OUTPUT
	dnl configuration script for expat
	dnl Process this file with autoconf to produce a configure script.
	dnl
	dnl Copyright 2000 Clark Cooper
	dnl
	dnl This file is part of EXPAT.
	dnl
	dnl EXPAT is free software; you can redistribute it and/or modify it
	dnl under the terms of the License (based on the MIT/X license) contained
	dnl in the file COPYING that comes with this distribution.
	dnl

	dnl Ensure that Expat is configured with autoconf 2.69 or newer.
	AC_PREREQ(2.69)

	dnl Get the version number of Expat, using m4's esyscmd() command to run
	dnl the command at m4-generation time. This allows us to create an m4
	dnl symbol holding the correct version number. AC_INIT() requires the
	dnl version number at m4-time, rather than when ./configure is run, so
	dnl all this must happen as part of m4, not as part of the shell code
	dnl contained in ./configure.
	dnl
	dnl NOTE: esyscmd() is a GNU M4 extension. Thus, we wrap it in an appropriate
	dnl test. I believe this test will work, but I don't have a place with non-
	dnl GNU M4 to test it right now.
	m4_define([expat_version],
	m4_ifdef([__gnu__],
	[esyscmd(conftools/get-version.sh lib/expat.h)],
	[2.2.x]))
	AC_INIT(expat, expat_version, expat-bugs@libexpat.org)
	m4_undefine([expat_version])

	AC_CONFIG_SRCDIR([Makefile.in])
	AC_CONFIG_AUX_DIR([conftools])
	AC_CONFIG_MACRO_DIR([m4])
	AM_INIT_AUTOMAKE


	dnl
	dnl Increment LIBREVISION if source code has changed at all
	dnl
	dnl If the API has changed, increment LIBCURRENT and set LIBREVISION to 0
	dnl
	dnl If the API changes compatibly (i.e. simply adding a new function
	dnl without changing or removing earlier interfaces), then increment LIBAGE.
	dnl
	dnl If the API changes incompatibly set LIBAGE back to 0
	dnl

	LIBCURRENT=7 # sync
	LIBREVISION=9 # with
	LIBAGE=6 # CMakeLists.txt!

	AX_APPEND_FLAG([-DHAVE_EXPAT_CONFIG_H], [CPPFLAGS])
	AC_CONFIG_HEADER([expat_config.h])

	AM_PROG_AR
	AC_PROG_INSTALL
	AC_PROG_LN_S
	AC_PROG_MAKE_SET

	LT_PREREQ([2.4])
	LT_INIT([win32-dll])

	AC_SUBST(LIBCURRENT)
	AC_SUBST(LIBREVISION)
	AC_SUBST(LIBAGE)

	AC_LANG([C])
	AC_PROG_CC_C99
	AS_IF([test "$GCC" = yes],
	[AX_APPEND_COMPILE_FLAGS([-Wall -Wextra], [CFLAGS])
	dnl Be careful about adding the -fexceptions option; some versions of
	dnl GCC don't support it and it causes extra warnings that are only
	dnl distracting; avoid.
	AX_APPEND_COMPILE_FLAGS([-fexceptions], [CFLAGS])
	AX_APPEND_COMPILE_FLAGS([-fno-strict-aliasing -Wmissing-prototypes -Wstrict-prototypes], [CFLAGS])
	AX_APPEND_COMPILE_FLAGS([-pedantic -Wduplicated-cond -Wduplicated-branches -Wlogical-op], [CFLAGS])
	AX_APPEND_COMPILE_FLAGS([-Wrestrict -Wnull-dereference -Wjump-misses-init -Wdouble-promotion], [CFLAGS])
	AX_APPEND_COMPILE_FLAGS([-Wshadow -Wformat=2 -Wmisleading-indentation], [CFLAGS])])

	AC_LANG_PUSH([C++])
	AC_PROG_CXX
	AS_IF([test "$GCC" = yes],
	[AX_APPEND_COMPILE_FLAGS([-Wall -Wextra], [CXXFLAGS])
	dnl Be careful about adding the -fexceptions option; some versions of
	dnl GCC don't support it and it causes extra warnings that are only
	dnl distracting; avoid.
	AX_APPEND_COMPILE_FLAGS([-fexceptions], [CXXFLAGS])
	AX_APPEND_COMPILE_FLAGS([-fno-strict-aliasing], [CXXFLAGS])])
	AC_LANG_POP([C++])

	AS_IF([test "$GCC" = yes],
	[AX_APPEND_LINK_FLAGS([-fno-strict-aliasing],[LDFLAGS])])

	EXPATCFG_COMPILER_SUPPORTS_VISIBILITY([
	AX_APPEND_FLAG([-fvisibility=hidden], [CFLAGS])
	AX_APPEND_FLAG([-DXML_ENABLE_VISIBILITY=1], [CFLAGS])])

	dnl Checks for header files.
	AC_HEADER_STDC

	dnl Checks for typedefs, structures, and compiler characteristics.

	dnl We define BYTEORDER to 1234 when the platform is little endian; it
	dnl defines it to 4321 when the platform is big endian. We also define
	dnl WORDS_BIGENDIAN to 1 when the platform is big endian.
	dnl
	dnl A long time ago (early 2000 years) AC_C_BIGENDIAN was considered
	dnl wrong when cross compiling, now (2018, GNU Autoconf 2.69) we assume
	dnl it is fine.
	AC_C_BIGENDIAN([AC_DEFINE([WORDS_BIGENDIAN], 1)
	AS_VAR_SET([BYTEORDER], 4321)],
	[AS_VAR_SET([BYTEORDER], 1234)])
	AC_DEFINE_UNQUOTED([BYTEORDER], $BYTEORDER, [1234 = LILENDIAN, 4321 = BIGENDIAN])

	AC_C_CONST
	AC_TYPE_SIZE_T

	AC_ARG_WITH([xmlwf],
	[AS_HELP_STRING([--without-xmlwf], [do not build xmlwf])], [],
	[with_xmlwf=yes])
	AM_CONDITIONAL([WITH_XMLWF], [test x${with_xmlwf} = xyes])

	AC_ARG_WITH([examples], [
	AS_HELP_STRING([--without-examples], [do not build examples @<:@default=included@:>@])], [], [with_examples=yes])
	AM_CONDITIONAL([WITH_EXAMPLES], [test x${with_examples} = xyes])

	AC_ARG_WITH([tests], [
	AS_HELP_STRING([--without-tests], [do not build tests @<:@default=included@:>@])], [], [with_tests=yes])
	AM_CONDITIONAL([WITH_TESTS], [test x${with_tests} = xyes])

	AM_CONDITIONAL([MINGW], [echo -- "${host}" \| ${FGREP} mingw >/dev/null])
	AM_CONDITIONAL([UNICODE], [echo -- "${CPPFLAGS}${CFLAGS}" \| ${FGREP} XML_UNICODE >/dev/null])


	AC_ARG_WITH([libbsd],
	[AS_HELP_STRING([--with-libbsd], [utilize libbsd (for arc4random_buf)])],
	[],
	[with_libbsd=no])
	AS_IF([test "x${with_libbsd}" != xno],
	[AC_CHECK_LIB([bsd],
	[arc4random_buf],
	[],
	[AS_IF([test "x${with_libbsd}" = xyes],
	[AC_MSG_ERROR([Enforced use of libbsd cannot be satisfied.])])])])
	AC_MSG_CHECKING([for arc4random_buf (BSD or libbsd)])
	AC_LINK_IFELSE([AC_LANG_SOURCE([
	#include <stdlib.h> /* for arc4random_buf on BSD, for NULL */
	#if defined(HAVE_LIBBSD)
	# include <bsd/stdlib.h>
	#endif
	int main() {
	arc4random_buf(NULL, 0U);
	return 0;
	}
	])],
	[AC_DEFINE([HAVE_ARC4RANDOM_BUF], [1], [Define to 1 if you have the `arc4random_buf' function.])
	AC_MSG_RESULT([yes])],
	[AC_MSG_RESULT([no])

	AC_MSG_CHECKING([for arc4random (BSD, macOS or libbsd)])
	AC_LINK_IFELSE([AC_LANG_SOURCE([
	#if defined(HAVE_LIBBSD)
	# include <bsd/stdlib.h>
	#else
	# include <stdlib.h>
	#endif
	int main() {
	arc4random();
	return 0;
	}
	])],
	[AC_DEFINE([HAVE_ARC4RANDOM], [1], [Define to 1 if you have the `arc4random' function.])
	AC_MSG_RESULT([yes])],
	[AC_MSG_RESULT([no])])])


	AC_MSG_CHECKING([for getrandom (Linux 3.17+, glibc 2.25+)])
	AC_LINK_IFELSE([AC_LANG_SOURCE([
	#include <stdlib.h> /* for NULL */
	#include <sys/random.h>
	int main() {
	return getrandom(NULL, 0U, 0U);
	}
	])],
	[AC_DEFINE([HAVE_GETRANDOM], [1], [Define to 1 if you have the `getrandom' function.])
	AC_MSG_RESULT([yes])],
	[AC_MSG_RESULT([no])

	AC_MSG_CHECKING([for syscall SYS_getrandom (Linux 3.17+)])
	AC_LINK_IFELSE([AC_LANG_SOURCE([
	#include <stdlib.h> /* for NULL */
	#include <unistd.h> /* for syscall */
	#include <sys/syscall.h> /* for SYS_getrandom */
	int main() {
	syscall(SYS_getrandom, NULL, 0, 0);
	return 0;
	}
	])],
	[AC_DEFINE([HAVE_SYSCALL_GETRANDOM], [1], [Define to 1 if you have `syscall' and `SYS_getrandom'.])
	AC_MSG_RESULT([yes])],
	[AC_MSG_RESULT([no])])])


	dnl Only needed for xmlwf:
	AC_CHECK_HEADERS(fcntl.h unistd.h)
	AC_TYPE_OFF_T
	AC_FUNC_MMAP

	AS_IF([test "$ac_cv_func_mmap_fixed_mapped" = "yes"],
	[AS_VAR_SET(FILEMAP,unixfilemap)],
	[AS_VAR_SET(FILEMAP,readfilemap)])
	AC_SUBST(FILEMAP)


	dnl Some basic configuration:
	AC_DEFINE([XML_NS], 1,
	[Define to make XML Namespaces functionality available.])
	AC_DEFINE([XML_DTD], 1,
	[Define to make parameter entity parsing functionality available.])
	AC_DEFINE([XML_DEV_URANDOM], 1,
	[Define to include code reading entropy from `/dev/urandom'.])

	AC_ARG_ENABLE([xml-context],
	AS_HELP_STRING([--enable-xml-context @<:@COUNT@:>@],
	[Retain context around the current parse point;
	default is enabled and a size of 1024 bytes])
	AS_HELP_STRING([--disable-xml-context],
	[Do not retain context around the current parse point]),
	[enable_xml_context=${enableval}])
	AS_IF([test "x${enable_xml_context}" != "xno"],
	[AS_IF([test "x${enable_xml_context}" = "xyes" \
	-o "x${enable_xml_context}" = "x"],
	[AS_VAR_SET(enable_xml_context,1024)])
	AC_DEFINE_UNQUOTED([XML_CONTEXT_BYTES], [${enable_xml_context}],
	[Define to specify how much context to retain around the current parse point.])])

	AC_ARG_WITH([docbook],
	[AS_HELP_STRING([--with-docbook],
	[enforce XML to man page compilation @<:@default=check@:>@])
	AS_HELP_STRING([--without-docbook],
	[skip XML to man page compilation @<:@default=check@:>@])], [],
	[with_docbook=check])

	AC_ARG_VAR([DOCBOOK_TO_MAN], [docbook2x-man command])
	AS_IF([test "x$with_docbook" != xno],
	[AC_CHECK_PROGS([DOCBOOK_TO_MAN], [docbook2x-man db2x_docbook2man docbook2man docbook-to-man])])
	AS_IF([test "x${DOCBOOK_TO_MAN}" = x -a "x$with_docbook" = xyes],
	[AC_MSG_ERROR([Required program 'docbook2x-man' not found.])])
	AS_IF([test "x${DOCBOOK_TO_MAN}" != x -a "x$with_docbook" != xno],
	[AS_IF([${DOCBOOK_TO_MAN} --help \| grep -i -q -F sgmlbase],
	[AC_MSG_ERROR([Your local ${DOCBOOK_TO_MAN} was found to work with SGML rather
	than XML. Please install docbook2X and use variable DOCBOOK_TO_MAN to point
	configure to command docbook2x-man of docbook2X.
	Or use DOCBOOK_TO_MAN="xmlto man --skip-validation" if you have xmlto around.
	You can also configure using --without-docbook if you can do without a man
	page for xmlwf.])])])

	AM_CONDITIONAL(WITH_DOCBOOK, [test "x${DOCBOOK_TO_MAN}" != x])

	AC_CONFIG_FILES([Makefile]
	[expat.pc]
	[doc/Makefile]
	[examples/Makefile]
	[lib/Makefile]
	[tests/Makefile]
	[tests/benchmark/Makefile]
	[xmlwf/Makefile])
	AC_CONFIG_FILES([run.sh], [chmod +x run.sh])
	AC_OUTPUT