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 2.58 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. define([expat_version], ifdef([__gnu__], [esyscmd(conftools/get-version.sh lib/expat.h)], [2.2.x])) AC_INIT(expat, expat_version, expat-bugs@libexpat.org) 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=8 # with LIBAGE=6 # CMakeLists.txt! AS_VAR_APPEND(CPPFLAGS," -DHAVE_EXPAT_CONFIG_H") AC_CONFIG_HEADER([expat_config.h]) AM_PROG_AR AC_PROG_INSTALL AC_PROG_LN_S AC_PROG_MAKE_SET AC_PROG_MKDIR_P 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 "$GCC" = yes], [AX_APPEND_COMPILE_FLAGS([-Wall], [CFLAGS]) dnl Be careful about adding the -fexceptions option; some versions of dnl GCC don't support it and it causes extra warnings that are only dnl distracting; avoid. AX_APPEND_COMPILE_FLAGS([-fexceptions], [CFLAGS]) AX_APPEND_COMPILE_FLAGS([-fno-strict-aliasing -Wmissing-prototypes -Wstrict-prototypes], [CFLAGS])]) AC_LANG_PUSH([C++]) AC_PROG_CXX AS_IF([test "$GCC" = yes], [AX_APPEND_COMPILE_FLAGS([-Wall], [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 "$GCC" = yes], [AX_APPEND_LINK_FLAGS([-fno-strict-aliasing],[LDFLAGS])]) AC_MSG_CHECKING(whether compiler supports visibility) AS_VAR_COPY(OLDCFLAGS,CFLAGS) AS_VAR_APPEND(CFLAGS,[" -fvisibility=hidden -Wall -Werror"]) AC_COMPILE_IFELSE([AC_LANG_SOURCE([[void __attribute__((visibility("default"))) foo(void); void foo(void) {}]])], [AC_MSG_RESULT(yes) AS_VAR_SET(CFLAGS,"$OLDCFLAGS -fvisibility=hidden -DXML_ENABLE_VISIBILITY=1")], [AC_MSG_RESULT(no) AS_VAR_COPY(CFLAGS, OLDCFLAGS)]) 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. dnl dnl A long time ago (early 2000 years) AC_C_BIGENDIAN was considered wrong dnl when cross compiling, now (2018, GNU Autoconf 2.69) we assume it is fine. AC_C_BIGENDIAN([BYTEORDER=4321],[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]) 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${with_libbsd}" = xyes], [AC_MSG_ERROR([Enforced use of libbsd cannot be satisfied.])])])]) AC_MSG_CHECKING([for arc4random_buf (BSD or libbsd)]) AC_LINK_IFELSE([AC_LANG_SOURCE([ #include /* for arc4random_buf on BSD, for NULL */ #if defined(HAVE_LIBBSD) # include #endif int main() { arc4random_buf(NULL, 0U); return 0; } ])], [AC_DEFINE([HAVE_ARC4RANDOM_BUF], [1], [Define to 1 if you have the `arc4random_buf' function.]) AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]) AC_MSG_CHECKING([for arc4random (BSD, macOS or libbsd)]) AC_LINK_IFELSE([AC_LANG_SOURCE([ #if defined(HAVE_LIBBSD) # include #else # include #endif int main() { arc4random(); return 0; } ])], [AC_DEFINE([HAVE_ARC4RANDOM], [1], [Define to 1 if you have the `arc4random' function.]) AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no])])]) AC_MSG_CHECKING([for getrandom (Linux 3.17+, glibc 2.25+)]) AC_LINK_IFELSE([AC_LANG_SOURCE([ #include /* for NULL */ #include int main() { return getrandom(NULL, 0U, 0U); } ])], [AC_DEFINE([HAVE_GETRANDOM], [1], [Define to 1 if you have the `getrandom' function.]) AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]) AC_MSG_CHECKING([for syscall SYS_getrandom (Linux 3.17+)]) AC_LINK_IFELSE([AC_LANG_SOURCE([ #include /* for NULL */ #include /* for syscall */ #include /* for SYS_getrandom */ int main() { syscall(SYS_getrandom, NULL, 0, 0); return 0; } ])], [AC_DEFINE([HAVE_SYSCALL_GETRANDOM], [1], [Define to 1 if you have `syscall' and `SYS_getrandom'.]) AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no])])]) dnl Only needed for xmlwf: AC_CHECK_HEADERS(fcntl.h unistd.h) AC_TYPE_OFF_T AC_FUNC_MMAP AS_IF([test "$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