#+TITLE: GNU Autoconf Archive NEWS -*- mode:org;fill-column:79; -*- #+STARTUP: showall # # Copyright (c) 2022 Autoconf Archive Maintainers # # Copying and distribution of this file, with or without modification, are # permitted in any medium without royalty provided the copyright notice # and this notice are preserved. This file is offered as-is, without any # warranty. * Noteworthy changes in release ?.? (????-??-??) [?] * Noteworthy changes in release 2023.02.20 (2023-02-20) [stable] Please refer to the ChangeLog file for a list of changes. * Noteworthy changes in release 2022.09.03 (2022-09-03) [stable] Please refer to the ChangeLog file for a list of changes. * Noteworthy changes in release 2022.02.11 (2022-02-11) [stable] AX_CC_FOR_BUILD was deprecated in favor of AX_PROG_CC_FOR_BUILD. * Noteworthy changes in release 2021.02.19 (2021-02-19) [stable] The macros AX_CHECK_PCRE2 and AX_PROG_ROBOT have been added. Many other macros have received updates. * Noteworthy changes in release 2019.01.06 (2019-01-06) [stable] The Autoconf Archive now has its own organization on Github. Therefore, the mirror has moved to https://github.com/autoconf-archive/autoconf-archive. The old location, https://github.com/peti/autoconf-archive redirects there. The macro AX_CODE_COVERAGE was modified to use AX_ADD_AM_MACRO_STATIC, and thus unfortunately usage was changed. * Noteworthy changes in release 2018.03.13 (2018-03-13) [stable] The macros AX_R_PACKAGE and AX_PROG_DATE have been added. Many other macros have received updates. * Noteworthy changes in release 2017.09.28 (2017-09-28) [stable] The macros AX_PROG_HELP2MAN, AX_RECURSIVE_EVAL, AX_SUBDIRS_CONFIGURE, AX_ELISP, and AX_PROG_EMACS have been added. Various macros have received updates. Please check the ChangeLog file or the history of the git repository for further details. * Noteworthy changes in release 2017.03.21 (2017-03-21) [stable] Obsolete macros AX_CXX_COMPILER_VENDOR, AX_GCC_LIBRARIES_DIR, AX_GCC_VERSION, and AX_HAVE_OPENGL have been removed from the archive. AX_DEFINE_SUB_PATH has been marked obsolete as suggested in https://github.com/peti/autoconf-archive/pull/97. * Noteworthy changes in release 2016.09.16 (2016-09-16) [stable] The following macros were added: AX_BUILD_DATE_EPOCH, AX_CHECK_X86_FEATURES, AX_GCC_X86_CPU_SUPPORTS, AX_OPEN62541_CHECK_H, AX_OPEN62541_CHECK_LIB, and AX_LUAROCKS_ROCK. While updating AX_CODE_COVERAGE, the variable CODE_COVERAGE_LDFLAGS was renamed to CODE_COVERAGE_LIBS. AX_VALGRIND_CHECK has been extended considerably. In this process. the undocumented internal rule check-valgrind-tool was removed. It checks if the host cpu supports various instruction set: mmx, sse, popcnt, avx, avx2, etc. If the instruction were supported, it would export HAVE_XXX_INSTRUCTIONS C preprocessor macros and add the instruction set flag to X86_FEATURES_CFLAGS variable. By default it would also set CFLAGS, but this can be disabled by the ACTION-IF-FOUND hook. AX_WITH_CURSES and AX_WITH_CURSES_* macros have been modernized, in line with PKG_CHECK_MODULES's style. This change breaks the interface, but makes AX_WITH_CURSES compatible and even completely replaceable with the interface of PKG_CHECK_MODULES. Ultimately, these macros should be replaced in the future by calls to PKG_CHECK_MODULES. Variables in AX_WITH_CURSES have been renamed CURSES_LIB -> CURSES_LIBS CURSES_CPPFLAGS -> CURSES_CFLAGS and for the AX_WITH_CURSES_* macros PANEL_LIB -> PANEL_LIBS MENU_LIB -> MENU_LIBS FORM_LIB -> FORM_LIBS such that once the variables have been renamed in configure.ac and Makefile.am, the calls AX_WITH_CURSES and PKG_CHECK_MODULES([CURSES], [ncurses]) are completely interchangeable. * Noteworthy changes in release 2016.03.20 (2016-03-20) [stable] The following new macros have been added: AX_CHECK_GIRS_GJS, AX_CHECK_GIR_SYMBOLS_GJS, AX_CXX_COMPILE_STDCXX, AX_CXX_COMPILE_STDCXX_14, AX_CZMQ, AX_FC_CHECK_DEFINE, AX_LIB_NETCDF4, AX_PROG_GJS, AX_RESTORE_FLAGS_WITH_PREFIX, AX_SAVE_FLAGS_WITH_PREFIX, AX_VAR_POP, AX_VAR_PUSH, and AX_ZMQ. Various improvements to the opengl macros. Main features added: - Support action-if-found and not-found hook - Export HAVE_GL, HAVE_GLU, and HAVE_GLUT preprocessor symbol - Add necessary flags to CFLAGS/LIBS by default, but can be disabled by overwriting action-if-found hook. - Fail the configure script if lib not found. This feature can be disabled by overwriting action-if-not-found hook - Fix problems on Mac OSX. Been tested on Linux (Ubuntu) and OSX - Use --with-xquartz-gl instead of --with-gl=x for using X11 on OSX Many new features were added to AX_CODE_COVERAGE and AX_PROG_DOXYGEN. AX_CXX_COMPILE_STDCXX now modifies $(CXX) rather than $(CXXFLAGS). AX_PTHREAD has been updated significantly. See https://savannah.gnu.org/patch/?8186 for further details. AX_PYTHON_DEVEL now provides PYTHON_LIBS instead of PYTHON_FLAGS. The macros related to C++11 and C++14 were extensively re-factored. * Noteworthy changes in release 2015.09.25 (2015-09-25) [stable] The Archive no longer releases an "lzip"-compressed tarball. The only supported format now is "xz". The rationale is that xz so widely supported that it seems pointless to archive two release archives on our servers for no apparent reason. AX_PYTHON_DEVEL changed to provide PYTHON_LIBS, not PYTHON_LDFLAGS. This change breaks scripts written with previous versions in mind! The rationale is that -L and -l are LIBS arguments, not LDFLAGS arguments. Returning output in PYTHON_LDFLAGS suggested wrongly that they should be used in LDFLAGS, which can cause the -L and -l arguments to be ignored when they are not in the expected position in the list of command line arguments. This is a problem, for instance, with the command line generated by AC_LINK_IFELSE. AX_CXX_COMPILE_STDCXX_11 now supports Cray's crayCC compiler (CCE 8.4). AX_PYTHON, AX_PYTHON_EMBED now support Python 3.4. AX_LIB_ORACLE_OCI now supports Oracle 12. AX_EXT now supports AVX2/AVX512 and other CPU extensions. The new macro AX_GNU_AUTOTEST was added. The macro supports multiple test-suites, Makefiles in different locations and many more features. AX_CXX_COMPILE_STDCXX_11 now checks for attribute support with C++11 macro. Some compilers pass the other tests while not implementing this part of the C++11 specification. The test used also does not cause warnings with GCC or Clang, and can be used with -Werror. The new macro AX_PROG_BISON_VERSION can be used to check for specific versions of bison. The new macro AX_PROG_FLEX_VERSION can be used to check for specific versions of flex. AX_APPEND_FLAG no longer fails if the given flag contains a ','. AX_LUA now supports Lua 5.3. AX_BERKELEY_DB_CXX now supports FreeBSD. AX_CXX_COMPILE_STDCXX_11 now support HP aCC. AX_PYTHON_MODULE and AX_PYTHON_MODULE_VERSION now support Python 3. The new macro AX_PYTHON_MODULE_VERSION has been added. AX_LIB_POSTGRESQL provides a new output variable POSTGRESQL_LIBS. AX_PATH_GENERIC now supports flags that contain spaces. AX_BOOST_BASE now supports native Windows header only libraries. * Noteworthy changes in release 2015.02.24 (2015-02-24) [stable] AX_CHECK_ENABLE_DEBUG now uses $ax_is_release as default for IS-RELEASE. AX_IS_RELEASE now supports micro-version policies. Portability of AX_CXX_COMPILE_STDCXX_0X has been improved. AX_PROG_HAXE_VERSION is a new macro to detect the presence of Haxe . AX_COMPILER_FLAGS has undergone extensive re-factoring. AX_COMPILER_FLAGS_CXXFLAGS is a new macro that tests available C++ compiler warnings. AX_CXX_COMPILE_STDCXX_11 can now test for SFINAE with template aliases. AX_APPEND_FLAG: Fix a regression introduced in the previous release. * Noteworthy changes in release 2015.02.04 (2015-02-04) [stable] AX_OPENMP: Test that we can actually #include successfully. AX_COMPILER_FLAGS was re-factored into AX_COMPILER_FLAGS_CFLAGS and AX_COMPILER_FLAGS_LDFLAGS. AX_CODE_COVERAGE detects gcov program. AX_VALGRIND_CHECK now supports running without libtool. AX_GCC_VERSION was improved. Re-factored and modernized the macros AX_CXX_TEMPLATES, AX_CXX_CONST_CAST, AX_CXX_COMPLEX_MATH_IN_NAMESPACE_STD, AX_CXX_BOOL, AX_APPEND_FLAG, AX_CHECK_*_FLAG, AX_CHECK_ENABLE_DEBUG, and AX_CXX_DEFAULT_TEMPLATE_PARAMETERS. AX_CXX_COMPILER_VENDOR was deprecated in favor of AX_COMPILER_VENDOR. AX_HAVE_OPENGL was deprecated in favor of AX_CHECK_GL, AX_CHECK_GLU, AX_CHECK_GLUT, and AX_CHECK_GLX. AX_CHECK_GL has a new parameter --with-mesa that allows choosing the order of opengl lib detection. Portability of AX_LUA was improved. Support for LUA 5.0 was added. New macros AX_IS_RELEASE, AX_COMPILER_FLAGS_GIR, AX_CXX_ERASE_ITERATOR_TYPE, AX_COMPILER_VERSION, AX_CHECK_GLX, AX_CHECK_VSCRIPT, AX_VALGRIND_CHECK, AX_PKG_CHECK_MODULES, and AX_COMPILER_FLAGS were added. AX_PROG_FLEX: Also accept gflex. AX_LIB_HDF5: remove extra leading space from include path flag. That space creeps into HDF5_CPPFLAGS and breaks the include path flag into two tokens, e.g., "-I" and "/usr/include". While this may be legal and doesn't affect the compilation, it does break some library tools (e.g., when the macro is used in building a dynamic library that uses pkg-config). AX_PERL_MODULE_VERSION: use more portable syntax for shell arithmetic. AX_JNI_INCLUDE_DIR: support standard Oracle JDK installation layout on Mac OS X. AX_PROG_JAVAH_BIN_DIR: fix misspelled variable name and follow javah symlink to find jni.h. AX_BOOST_PYTHON: use unique names for local variables * Noteworthy changes in release 2014.10.15 (2014-10-15) [stable] A brand-new Github mirror of the Archive's Git repository is available at . That project allows developers to submit patches as Pull Requests instead of having to go through Savannah's patch tracker. The Archive no longer creates release tarballs compressed with gzip and bzip2; only tarballs compressed with xz and lzip are distributed. AX_LIB_POSTGRESQL: substitute CPPFLAGS rather than CFLAGS. AX_GCC_ARCHFLAG: Rewrite x86 support and extend Clang support . AX_GCC_VAR_ATTRIBUTE: support the init_priority attribute. AX_PERL_MODULE_VERSION: fix a misspelled variable name. Other unfixed issues remain. See . AX_BOOST_PYTHON: several issue have been fixed. Further details can be found at . AX_HAVE_QT: Only check $PATH and qmake for Qt variables. The old logic for detecting Qt without $PATH or qmake was never very reliable and the last change to this macro broke it entirely. If the Qt variables cannot be found via $PATH and qmake, then it would be best to manually define them in the makefile. AX_TLS: fix quoting problem. AX_F90_LIBRARY: several bug fixes and improvements. Further details are at . AX_LUA: fix initialization of ac_cv_header_lua_h. Further details are at . AX_AT_CHECK_PATTERN: executes a test similar to AT_CHECK(), except that stdout and stderr are awk regular expressions. Further details can be found at . AX_OPENMP: prevent false negative due to -Wunused-variable. AX_COMPILER_VENDOR: improve detection of the CRAY compiler. AX_ENABLE_BUILDDIR: support absolute paths. AX_HAVE_QT: auto-detect Qt 5 by querying $PATH and qmake. Submitted in . AX_CHECK_ENABLE_DEBUG: add an --enable-debug option which defines an ENABLE_DEBUG cpp variable if set. Submitted in . AX_CODE_COVERAGE: new macro which contains all the necessary logic and Makefile rules for instrumenting a project with code coverage using lcov. Submitted in . AX_LIB_HDF5: don't overwrite the CPPFLAGS variable. Submitted in . AX_BOOST_BASE: fix for x32 systems. This subject probably needs more attention, though. See . AX_BERKELEY_DB(_CXX): add --with-libdb option so that this macros works on OSX with home-brew installed version of BDB. Submitted in . AX_CXX_HAVE_PLACEHOLDERS: check if std::placeholders is defined in . Submitted it . AX_LIB_HDF5: add support for recognizing HDF5 built with ccache. Submitted in . AX_CC_MAXOPT: Improve CPUID identification patterns as mentioned in patch #8514. Add ICC options added in version 11.0 (which deprecates older -xX style options). Add support for latest Intel performance processors (see #8514 for details). See . AX_EXECINFO: new macro to test execinfo size type. Submitted in . AX_CXX_VAR_PRETTYFUNC: new macro to determine the function name. AX_CC_MAXOPT: default to -O2 for MSVC instead of -O3. AX_CXX_HAVE_REFERENCE_WRAPPER, AX_CXX_HAVE_BAD_FUNCTION_CALL, AX_CXX_HAVE_BIND, AX_CXX_HAVE_BIT_AND, AX_CXX_HAVE_BIT_OR, AX_CXX_HAVE_BIT_XOR, AX_CXX_HAVE_CREF, AX_CXX_HAVE_FUNCTION, AX_CXX_HAVE_HASH, AX_CXX_HAVE_IS_BIND_EXPRESSION, AX_CXX_HAVE_IS_PLACEHOLDER, AX_CXX_HAVE_MEM_FN, AX_CXX_HAVE_REF: remove dependency on AX_CXX_NAMESPACES. AX_BOOST_BASE has been extended to recognize ppc64le as a lib64 architecture. Submitted in . AX_PROG_FLEX has been extended to support OpenBSD. AX_COUNT_CPUS has been extended to support Win32 (and Win64). Further details are at . * Noteworthy changes in release 2014.02.28 (2014-02-28) [stable] AX_PERL_EXT has been extended to report back the installation prefix as PERL_EXT_PREFIX. AX_EXT has been extended to deal with a situation where AX_GCC_X86_CPUID(0x00000001) returns 'unknown'. Further details can be found at . AX_ZONEINFO has improved support for AIX. Further details can be found at . The set of search paths checked by AX_LUA has been extended, mostly in an effort to support FreeBSD and OpenBSD: and have further details. The new macros AX_CXX_HAVE_BAD_FUNCTION_CALL, AX_CXX_HAVE_BIND, AX_CXX_HAVE_BIT_AND, AX_CXX_HAVE_BIT_OR, AX_CXX_HAVE_BIT_XOR, AX_CXX_HAVE_CREF, AX_CXX_HAVE_FUNCTION, AX_CXX_HAVE_HASH, AX_CXX_HAVE_IS_BIND_EXPRESSION, AX_CXX_HAVE_IS_PLACEHOLDER, AX_CXX_HAVE_MEM_FN, AX_CXX_HAVE_REF, and AX_CXX_HAVE_REFERENCE_WRAPPER have been added. M4sugar and M4sh added to AX_PROG_JAR, AX_PROG_JAVA, AX_PROG_JAVAC, and AX_PROG_JAVADOC. Also fixed a path discrepancy with AX_JAVA_OPTIONS. See for further details. The "mandatory" option in AX_CXX_COMPILE_STDCXX_11 has been fixed, and support for Gentoo's hardened GCC has been improved. Further details are at . Three new macros were submitted in : - AX_GCC_BUILTIN is used to detect GCC-compatible built-in functions (e.g. AX_GCC_BUILTIN([__builtin_expect]) to check for __builtin_expect()). - AX_GCC_FUNC_ATTRIBUTE used to detect GCC-compatible function attributes (e.g. AX_GCC_FUNC_ATTRIBUTE([pure]) to check for _attribute_((pure))). - AX_GCC_VAR_ATTRIBUTE is used to detect GCC-compatible variable attributes (e.g. AX_GCC_VAR_ATTRIBUTE([unused]) to check for _attribute_((unused))). AX_BOOST_BASE has been updated to recognize the new multi-arch system paths on Ubuntu 13.10 x86_64. See for further details. Fixed a cut-and-paste error in AX_CREATE_PKGCONFIG_INFO. Further details are available at . Extended AX_CHECK_{PREPROC,COMPILE,LINK}_FLAG macros to accept an additional "input" argument. See for further details. Fix recognition of UltraSparc IIi in AX_GCC_ARCHFLAG. Further details can be found at . * Noteworthy changes in release 2013.11.01 (2013-11-01) [stable] AX_PROG_CXX_MPI has been updated to recognize an MPI C++ compiler. Further details are at . The new macro AX_AM_OVERRIDE_VAR allows "overriding" of user provided variables for Automake. See for further details. AX_COMPILER_VENDOR has been extended to support detection of Fujitsu compilers. See for further details. AX_TRY_RUN_JAVA and AX_TRY_COMPILE_JAVA has been made more picky about what they delete. See for further details. The new macro AX_PROG_SCALA checks that scala is available. Further details are available at . The new macro AX_FIND_SCALA_STDLIB add support for finding the jar containing the Scala Standard Library. See for further details. The new macro AX_PROG_SCALAC provides support for finding a Scala compiler. See for further details. The new macros AX_FIND_HAMCREST and AX_FIND_JUNIT have been added, which provide support for finding the jars of JUnit and Hamcrest. Please refer to for further details. AX_PTHREAD has been extended to support Clang. Further details can be found at . The macros AX_GCC_LIBRARIES_DIR and AX_GCC_VERSION have been marked obsolete because they depend on the obsolete AX_GCC_OPTION macro. Further details can be found at . New macros AX_BOOST_CONTEXT, AX_BOOST_COROUTINE, AX_BOOST_LOG, AND AX_BOOST_LOG_SETUP have been added to detect Boost.Log and Boost.Coroutine. AX_PROG_PERL_VERSION has been extended to recognize recent versions of Perl. See for further details. AX_JNI_INCLUDE_DIR now recognizes the $JAVA_HOME environment variable when trying to locate the Java SDK. See for further details. AX_EXT has been extended to recognize cases where a CPU supports AVX, but the operating system does not. See for further details. Support for 64-bit FreeBSD has been improved in AX_EXT, AX_GCC_ARCHFLAG. See for further details. AX_BOOST_BASE has been extended to recognize aarch64 as a lib64 architecture. A bug in AX_LIB_HDF5 has been fixed that would result in $CC not being restored properly after testing. * Noteworthy changes in release 2013.06.09 (2013-06-09) [stable] AX_PROG_FLEX has been updated to be more liberal about the name of the flex executable. AX_LIB_HDF5 has been updated to support the variables HDF5_CC, HDF5_FC, and HDF5_LIBS. See for further details. AX_XSDCXX has been added; a macro to find the CodeSynthesis XSD executable and the corresponding headers. See for further details. AX_PYTHON_DEVEL no longer overrides LOCALMODLIBS. Further details are available at . The portability of AX_ZONEINFO has been improved. Further details can be found at . The configure flags generated by AX_ENABLE_DEFAULT_ACLOCALDIR have been fixed. AX_CHECK_GLU and AX_CHECK_GLUT have been added again by a new maintainer. * Noteworthy changes in release 2013.04.06 (2013-04-06) [stable] AX_PROG_CC_FOR_BUILD and AX_PROG_CXX_FOR_BUILD have been simplified to require only AC_CANONICAL_HOST instead of AC_CANONICAL_SYSTEM. Further details are available at . A substantially updated version of the formerly obsoleted AX_CHECK_GL macro has been added again in . The new macro AX_LIB_SAMTOOLS has been added to check for Samtools . See for further details. The new macro AX_LIB_TABIX has been added to check for Tabix . Further details are available at . AX_CXX_COMPILE_STDCXX_11 has been extended to test for the "auto" keyword. Further details can be found at . Support for AIX has been improved in AX_PTHREAD. Further details are available at . AX_PYTHON_DEVEL's ability to detect the proper suffix for shared libraries has been improved. See for further details. AX_BOOST_PYTHON has been switched to AX_PYTHON_DEVEL. Further details are available at and at . Fixed AX_LIB_EXPAT not to overwrite $LIBS. Furthermore, linker flags are now returned in $EXPAT_LDFLAGS instead of $EXPAT_LIBS. Further details are available at . AX_PYTHON has been updated to use the "distutils" module to find Python's header files instead of depending on the "locate" command. Further details are at . AX_PYTHON_DEVEL has been extended to support ubuntu 13.04. See for further details. Incorrect CPU detection in AX_GCC_ARCHFLAG has been fixed. See for further details. AX_EXT has been extended to recognize AVX SIMD instructions. A release tarball was added that is compressed with the free lzip utility. AX_JNI_INCLUDE_DIR has been extended to support FreeBSD. AX_PYTHON has been extended to support ArchLinux. See for further details. AX_PYTHON_DEVEL has been extended to support ArchLinux. See for further details. A minor bug in AX_BOOST_ASIO has been fixed. Further details are at . * Noteworthy changes in release 2013.02.02 (2013-02-02) [stable] Support for AIX has been improved in AX_PTHREAD. Further details are available at . AX_BOOST_FILESYSTEM has been improved to work more reliable on non-GNU systems. See for further details. The new macro AX_LIB_EV has been added, which checks for libev in a pkg-config-like manner. The purpose of the macro is to unify behaviour between distros that come with libev.pc and systems (e.g. upstream) that don't. Further details are at . The portability of AX_PYTHON has been improved. Also, the macro now recognizes more recent versions of the Python interpreter, too. See for further details. Support for cross-compilation in AX_PROG_CC_FOR_BUILD has been improved. See for further details. The new macro AX_PROG_CXX_FOR_BUILD has been added. Further details are available at . Mac OS X support in AX_OPENMP has been improved. Further details are available at . * Noteworthy changes in release 2012.11.14 (2012-11-14) [stable] The portability of AX_BOOST_SYSTEM and AX_BOOST_THREAD has been improved. See for further details. AX_COUNT_CPUS has been cleaned up. See for further details. * Noteworthy changes in release 2012.09.08 (2012-09-08) [stable] AX_BLAS has been extended to detect the Intel Math Kernel Library (MKL). See for further details. Several bugs and inconsistencies in AX_TRY_RUN_JAVA, AX_PROG_JAVA_WORKS, AX_CHECK_CLASS, and AX_PROG_JAVA have been fixed. See for further details. AX_INCLUDE_STRCASECMP has been added. The macro detects which header file defines the strcasecmp() function. See for further details. AX_LIB_ORACLE_OCCI has been added. The macro detects the availability of the Oracle OCCI API of particular version or newer. Further details can be found at . AX_CHECK_POSTGRES_DB has been substantially re-written. The default behavior is unchanged, but there are two new (optional) arguments ACTION-IF-FOUND and ACTION-IF-NOT-FOUND. See for further details. AX_CXX_RVALUE_REFERENCES has been added. See for further details. AX_BLAS has been extended to support for the (free-software, BSD-licensed) OpenBLAS library, a descendant of GotoBLAS . See for further details. The reliability of AX_BOOST_SYSTEM and AX_BOOST_FILESYSTEM has been improved. See for further details. The new entry AX_ZONEINFO has been added. Further details are available at . AX_CHECK_ZLIB has been updated significantly: - The behavior was changed so that the macro proceeds to compile and link tests even if zlib.h was not found in the "usual locations". - The macro interface has been extend to the typical ([action-if-found], [action-if-not-found])-style. - Previous versions used to search zlib in "usual locations" only if --with-zlib was provided [by user]. Now, the macro performs that search in default mode, too. See for further details. The new macro AX_PRINTF_SIZE_T has been added which can be used to check for the appropriate printf() format string modifier to use with a size_t argument. See for further details. A bug has been fixed in the Intel MKL library test of AX_BLAS. See for further details. AX_BOOST_SERIALIZATION has been improved to support for MacOS/BSD sed. Further details can be found at . * Noteworthy changes in release 2012.04.07 (2012-04-07) [stable] The macro AX_CXX_COMPILE_STDCXX_11 has been added, which determines the compiler switches that need to be added to be passed in order to enable C++11 support in the compiler. See for further details. The new macro AX_CXX_DELETE_METHOD has been added which checks whether the C++11 '= delete' syntax for suppressing undesired implicit methods is supported. Further details are at . The macros AX_BOOST_CHRONO and AX_BOOST_LOCALE have been added which detect the Boost.Chrono and Boost.Locale library respectively. Further details are at and . Support for automatic detection of dynamic libraries on Mac OS X (*.dylib) has been improved in all Boost macros. has further details. Portability of AX_CHECK_LIBRARY has been improved so that the macro can be used with Autoconf versions prior to 2.64. AX_GCC_ARCHFLAG has been extended to support new Intel/AMD CPUs. See for further details. An endless recursion-bug in AX_COUNT_CPUS has been fixed. See for further details. AX_LUA_LIBS has been fixed to work with Lua 5.2. * Noteworthy changes in release 2011.12.21 (2011-12-21) [stable] Error reporting in AX_BERKELEY_DB_CXX has been improved in the case the macro is called without LANG=C++. See for further details. Solaris support in AX_PTHREAD has been improved. Further details are available at . Under-quoted use of $CPPFLAGS has been fixed in AX_BOOST_PYTHON. See for further details. The list of headers required by C++11 (the standard formerly known as C++0x) has been updated in AX_CXX_HEADER_STDCXX_0X. Further details are available at . A bug in AX_WITH_CURSES has been fixed that prevented CURSES_LIB from being used. See for further details. The compiler tests in AX_EXT have been fixed, and support for detection of SSE4.1, SSE4.2, AVX extensions has been added. See for further details. The new macro AX_LIB_GDAL has been added which tests the availability of the GDAL/OGR library. Further details are available at . Fixed Darwin support in AX_ENABLE_BUILDDIR. Further details are available at . The obsolete macros AX_C_CHECK_FLAG, AX_CFLAGS_GCC_OPTION, AX_CHECK_COMPILER_FLAGS, AX_CHECK_GL, AX_CHECK_GLU, AX_CHECK_GLUT, AX_CHECK_LINKER_FLAGS, AX_CHECK_SUNPRO_C, AX_CPP_CHECK_FLAG, AX_CXX_CHECK_FLAG, AX_CXXCPP_CHECK_FLAG, AX_DEFINE_DIR, AX_FUNC_FORK, AX_GCC_INSTALL_DIR, AX_GXX_VERSION, AX_LANG_COMPILER_MS, AX_LD_CHECK_FLAG, and AX_SNPRINTF_OFLOW have been dropped from the distribution. * Noteworthy changes in release 2011.09.17 (2011-09-17) [stable] AX_LIB_MYSQLCPPCONN has been added, a macro that tests for the MySQL Connector/C++ libraries. See for further details. AX_LIB_TRACE has been added, a macro that tests for the libtrace libraries. See for further details. AX_FUNC_FORK and AX_SNPRINTF_OFLOW have been marked obsolete, because there are superior alternatives. AX_DEFINE_DIR has been marked obsolete because its design does not comply with the GNU Coding Standards. Modified AX_LIB_SQLITE3 to find the library using the C instead of the C++ compiler. See for further details. AX_CHECK_GL, AX_CHECK_GLU, AX_CHECK_GLUT have been marked obsolete. The author of these macros prefers to publish them on his own website at . AX_CHECK_MYSQL has been significantly re-factored to fix several bugs. See for further details. New additions AX_PERL_EXT and AX_RUBY_EXT can be used to fetch the linker flags and C compiler flags for compiling and linking Perl/Ruby binary extensions. AX_LIB_HDF5 erroneously defined HAVE_HDF5 even when the library was not detected. This has been fixed. Autoconf 2.68 warnings concerning AX_PTHREAD haven been fixed. AX_WITH_CURSES has been extensively re-written, and the new variants AX_WITH_CURSES_PANEL, AX_WITH_CURSES_MENU, and AX_WITH_CURSES_FORM have been added. See for further details. AX_GCC_INSTALL_DIR, AX_GCC_LIBRARIES_DIR, AX_GCC_VERSION, and AX_GXX_VERSION are non-functional and have been marked obsolete, because they depend on the obsolete AX_GCC_OPTION macro, which has been removed from the archive. * Noteworthy changes in release 2011.07.17 (2011-07-17) [stable] A cut-and-paste error in AX_BOOST_FILESYSTEM has been fixed. See for further details. The macros AX_CHECK_SUNPRO_C and AX_LANG_COMPILER_MS are deprecated in favor of the more generic AX_COMPILER_VENDOR. Several instance of under-quoted arguments have been fixed in AX_CHECK_OPENSSL. See for further details. The new macros AX_CHECK_PREPROC_FLAG, AX_CHECK_COMPILE_FLAG, and AX_CHECK_LINK_FLAG have been added. They are intended to replace AX_CHECK_COMPILER_FLAGS, AX_CHECK_LINKER_FLAGS, AX_C_CHECK_FLAG, AX_CPP_CHECK_FLAG, AX_CXX_CHECK_FLAG, AX_CXXCPP_CHECK_FLAG and AX_LD_CHECK_FLAG. Consequently, the older macros have been marked obsolete, and they'll be removed from the archive in the foreseeable future. Further details can be found at . The new macro AX_APPEND_FLAG, to append a flag to a FLAGS variable, has been added. The convenience wrappers AX_APPEND_COMPILE_FLAGS and AX_APPEND_LINK_FLAGS have been added. Those two macros add the given flags only if the compiler/linker understands them. The obsolete macros AX_CFLAGS_WARN_ALL_ANSI, AX_C_IFDEF, AX_C_PRINTF_THSEP, AX_GCC_OPTION, AX_WITH_GUILE, AX_WITH_PERL, AX_WITH_PYTHON, and AX_WITH_RUBY have been deleted. The new macro AX_CHECK_MYSQL has been added. It is geared specifically toward MySQL plugin development. See for further details. AX_PTHREAD has been extended to check for PTHREAD_PRIO_INHERIT. See for further details. Several several bugs in AX_CHECK_DEFINE have been fixed. See for further details. The new macros AX_PROG_CC_MPI, AX_PROG_CXX_MPI, AX_PROG_F77_MPI, and AX_PROG_FC_MPI address several shortcomings found in AX_MPI. Further details can be found at , . AX_BOOST_THREAD: Two bugs have been fixed that prevented the macro from being used in cross-compilation environments for Windows on Unix. AX_VAR_TIMEZONE_EXTERNALS, AX_FUNC_WHICH_GETHOSTBYNAME_R, and AX_PTHREAD have been updated to conform with Autoconf 2.68 * Noteworthy changes in release 2011.04.12 (2011-04-12) [stable] AX_LUA has been improved to work correctly with LuaJIT. Changed AX_HAVE_QT to list libraries last, not first. Other previously used ordering will fail when --as-needed is in effect. See for further details. * Noteworthy changes in release 2011.03.17 (2011-03-17) [stable] AX_PATH_GENERIC has been extended to allow setting LIBRARY_LIBS and LIBRARY_CFLAGS variables on configure command line or in the environment to override the normal values returned by `library-config --libs` and `--cflags` respectively. See for further details. AX_LIB_EXPAT has been modified to save the found library in EXPAT_LIBS instead if EXPAT_LDFLAGS. This is necessary to avoid build failures when linking with --as-needed. See for further details. AX_PKG_SWIG has been extended to find SWIG v2 as installed by Ubuntu Maverick and Ubuntu Natty. AX_PROG_SPLINT has been added. The macro provides Automake support for the splint utility. See for further details. Fixed a regression in AX_EXT_HAVE_LIB. The new macro AX_BERKELEY_DB_CXX has been added. It is a variant of AX_BERKELEY_DB that has been adapted to check for C++ headers and libraries. See for further details. * Noteworthy changes in release 2011.01.02 (2011-01-02) [stable] AX_BOOST_BASE has been extended to support non-x86 64-bit architectures, such as PPC64 or Sparc64, too. See for further details. AX_CHECK_ZLIB has been bug-fixed to honor the --with-zlib option. Further details are available at . AX_CHECK_JAVA_HOME has been extended to deal correctly with MacOS X. See for further details. The robustness of AX_PROG_FLEX and AX_PROG_BISON has been improved. See for further details. A bug in AX_EXT_HAVE_LIB has been fixed that prevented the macro from being called several times. See for further details. The new macro AX_CXX_RESTRICT_THIS has been added. It's purpose is to determine whether the C++ compiler supports qualifying a member function with a restricted "this" pointer. See for further details. AX_CXX_COMPILE_STDCXX_0X has been improved to support GCC 4.5.x. Please refer to for further details. The macro AX_GCC_OPTION has been marked obsolete and will be deleted from the archive in the foreseeable future. Its functionality is now provided by AX_C_CHECK_FLAG, AX_CXX_CHECK_FLAG, AX_CPP_CHECK_FLAG, AX_CXXCPP_CHECK_FLAG, and AX_LD_CHECK_FLAG. The license of the following macros has been updated from GPLv2 (with Autoconf exception) to GPLv3 (with Autoconf exception): AX_ARG_WITH_PATH_STYLE, AX_C_BIGENDIAN_CROSS, AX_C_DECLARE_BLOCK, AX_CFLAGS_AIX_OPTION, AX_CFLAGS_FORCE_C89, AX_CFLAGS_GCC_OPTION, AX_CFLAGS_HPUX_OPTION, AX_CFLAGS_IRIX_OPTION, AX_CFLAGS_NO_WRITABLE_STRINGS, AX_CFLAGS_STRICT_PROTOTYPES, AX_CFLAGS_SUN_OPTION, AX_CFLAGS_WARN_ALL_ANSI, AX_CHECK_ALIGNED_ACCESS_REQUIRED, AX_CHECK_DEFINE, AX_CHECK_FUNC_IN, AX_CHECK_SYMBOL, AX_CHECK_TYPEDEF, AX_COND_WITH_LEVEL, AX_CONFIGURE_ARGS, AX_CREATE_GENERIC_CONFIG, AX_CREATE_STDINT_H, AX_CREATE_TARGET_H, AX_DEFINE_SUB_PATH, AX_DIRNAME, AX_ENABLE_BUILDDIR, AX_EXPAND_PREFIX, AX_GCC_CONST_CALL, AX_GCC_MALLOC_CALL, AX_GCC_WARN_UNUSED_RESULT, AX_MAINTAINER_MODE_AUTO_SILENT, AX_NOT_ENABLE_FRAME_POINTER, AX_NUMERIC_NAMEDLEVEL, AX_PATCH_LIBTOOL_CHANGING_CMDS_IFS, AX_PATH_LIB_PCRE, AX_PREFIG_CONFIG_H, AX_PROG_CC_CHAR_SUBSCRIPTS, AX_PROG_CP_S, AX_SET_DEFAULT_PATHS_SYSTEM, AX_SPEC_FILE, AX_SPEC_PACKAGE_VERSION, AX_SUBDIR_FILES, AX_SUBST_WITH, AX_SYS_LARGEFILE_SENSITIVE, AX_WARNING_DEFAULT_ACLOCALDIR, and AX_WARNING_DEFAULT_PKGCONFIG. The macros AX_CXX_CPPFLAGS_STD_LANG, AX_CXX_CXXFLAGS_STD_LANG and AX_CXX_LDFLAGS_STD_LANG have been modified to use AX_COMPILER_VENDOR for compiler detection. The new macro AX_ASM_INLINE has been added. It's purpose is to determine whether the C compiler supports in-line assembler instructions. The new macro AX_FORCEINLINE has been added. It's purpose is to determine whether the C compiler supports forced in-lining. The new macro AX_LIB_CGAL_CORE has been added. Further details are available at . The new macro AX_CHECK_LIBRARY has been added. Further details are available at . AX_JNI_INCLUDE_DIR has been fixed to work correctly on MacOS X 10.6.4, where the header is a symbolic link. Further details are available at . * Noteworthy changes in release 2010.10.26 (2010-10-26) [stable] The macros AX_WITH_GUILE, AX_WITH_PERL, AX_WITH_PYTHON, and AX_WITH_RUBY are considered obsolete and will be deleted from the archive in the foreseeable future. Use of obsolete macros can be identified by running autoconf(1) with the flag -Wobsolete. Furthermore, the standard utility autoupdate(1) provides assistance with updating existing "configure.ac" files. AX_PROG_DOXYGEN has been extended to implement "DX_DOT_FEATURE(ON|OFF)". This feature was documented, but it didn't actually exist. Further details are available at . A bug in AX_BOOST_BASE has been fixed that would cause BOOST_LDFLAGS to be detected incorrectly. See for further details. AX_LIB_HDF5 has been extended to support requesting either a serial or a parallel HDF5 installation. Furthermore, the macro can now detect whether or not a Fortran-ready installation is present. Further details are available at . AX_CFLAGS_WARN_ALL has been cleaned up to avoid use of obsolete Autoconf constructs. Also, a new variant of the macro, AX_FCFLAGS_WARN_ALL, has been added to enable support for Fortran. Further details are available at . AX_COMPILER_VENDOR has been extended to support the Clang compiler. Caching issues in AX_BLAS have been remedied. Further details are available at . Plenty of Autoconf 2.68 warnings have been fixed. Added initial version of AX_CC_FOR_BUILD. AX_LUA_LIB_VERSION has been renamed to AX_LUA_HEADERS_VERSION, because that is what the macro is checking, really. A new macro AX_LUA_READLINE has been added. The AX_PREFIX_CONFIG_H macro has been improved to support the system shell "dash". See for further details. The AX_BLAS_F77_FUNC macro has been improved to properly save and restore the value of the $LIBS variable. Furthermore, an extra check was added to verify that the integer size of Fortran (4 or 8 bytes) matches that of BLAS. See for further details. AX_TLS has been updated to usual FOUND/NOT-FOUND interface. Handling of indirectly named shell variables has been fixed in AX_CFLAGS_GCC_OPTION. There have also been improvements to the documentation. See and for further details. * Noteworthy changes in release 2010.08.19 (2010-08-19) [stable] 64-bit support in the boost macros has been improved. Further details are at: . A test logic error in AX_LIB_MYSQL has been fixed. Further details are at . The boost macros for iostreams, regex, serialization, signals, system, test_exec_monitor, unit_test_framework, wave, and wserialization have been patched not to rely on being executed by a 'bash' shell. Also, an under-quoted shell variable has been fixed in AX_BOOST_BASE. The documentation of AX_MPI has been improved. Further details are at . * Noteworthy changes in release 2010.07.06 (2010-07-06) [stable] Fixed compiler warning in AX_PTHREAD's test program for AC_TRY_LINK. * Noteworthy changes in release 2010.06.04 (2010-06-04) [beta] The Autoconf Archive has been declared an official GNU project. Consequently, the web site has moved from to . Old addresses remain valid for the foreseeable future, though. AX_BOOST_DATE_TIME and AX_BOOST_FILESYSTEM have been patched to function correctly on systems that use "dash" as the system shell (i.e. Debian). AX_PTHREAD has been fixed to provide the "-pthreads" flag on 10.6 OS X systems. Fixed use of $EXEEXT in AX_CHECK_JAVA_HOME, AX_PROG_JAVA, AX_PROG_JAVA_WORKS, AX_PROG_JAVAC, and AX_PROG_JAVADOC. Further details can be found at . AX_LIB_LIBKML, a macro to detect Google's libkml library, has been added. See http://savannah.gnu.org/patch/?7109 for further details. AX_PREFIX_CONFIG_H has been bug-fixed to avoid generating extraneous spaces that would break prefixed macros. AX_F90_MODULE_FLAG has been bug-fixed with regard to the Compaq Alpha Fortran compiler. A typo in the code of AX_PYTHON_EMBED has been fixed that resulted in the function AX_PYTHON_INSIST being undefined. The new AX_LIB_HDF5 macro provides functionality to detect the HDF5 library. The version detection code in AX_PKG_SWIG has been fixed. Previous versions of this macro would fail to accept SWIG 2.0 where SWIG >= 1.3.x was requested. * Noteworthy changes in release 2010.02.14 (2010-02-14) [beta] All macros have been assigned a unique serial number that corresponds to the number of commits that have modified the macro in the Archive's Git repository. Refer to the [[https://www.gnu.org/software/libtool//manual/automake/Serials.html][Automake documentation on serial numbers]] for further details about why these numbers are useful. The text of the all-permissive license has been augmented by an express warranty disclaimer as [[https://www.gnu.org/prep/maintain/html_node/License-Notices-for-Other-Files.html][suggested by the Free Software Foundation]]. AX_CXX_VERBOSE_TERMINATE_HANDLER has been generalized to support architectures other than GNU libstdc++. AX_CHECK_ICU has been extended to support icu-specific CPPFLAGS. AX_BOOST_BASE has been improved to work correctly in a cross-compilation environment and extended to support an ACTION-IF-FOUND/ACTION-IF-NOT-FOUND-style API. AX_PTHREAD has been updated to succeed when compiling with -Wall and -Werror. AX_C_IFDEF has been deprecated, because the standard Autoconf macro AC_CHECK_DECL provides the same functionality. AX_C_PRINTF_THSEP has been deprecated because of technical flaws. See http://savannah.nongnu.org/patch/?6848 for further details. AX_RESTORE_FLAGS and AX_SAVE_FLAGS have been added. AX_SYS_LARGEFILE_SENSITIVE has improved support for x86_64 hosts. AX_MPIP has been added. In all macros, calls to the obsolete AC_HELP_STRING function have been replaced with the newer, recommended AS_HELP_STRING. * Noteworthy changes in release 2009.12.16 (2009-12-16) [alpha] All macros that used a prefix other than AX_ -- or no prefix at all -- have been renamed to use AX_ consistently. The new version forward old calls under their old names to the new ones via Autoconf's AU_ALIAS mechanism. The HTML documentation is obsolete. Instead, the archive now ships its documentation in Texinfo format. All macros distributed by the archive are now licensed under terms that do *not* limit the choice of license for the generated configure script. Previous releases didn't meet this requirement because they contained macros that were licensed under GPL or Lesser GPL without an Autoconf Exception. Please refer to the [[ChangeLog]] file for a complete list of changes. * Noteworthy changes in release 2009.07.31 (2009-07-31) [alpha] The archive has moved to Savannah: http://www.nongnu.org/autoconf-archive/ Version 2009-04-26 was the last to be released at autoconf-archive.cryp.to. The version identifier has been changed to a "year.month.day" spelling, rather than the ISO format, because the dot-separated spelling works better for most distributions and for the gnulib infrastructure. The 2009.07.31 release was an internal test release that has never been publicly available.