The GNU Autoconf team is pleased to announce the stable release of Autoconf 2.63. Autoconf is an extensible package of M4 macros that produce shell scripts to automatically configure software source code packages. These scripts can adapt the packages to many kinds of UNIX-like systems without manual user intervention. Autoconf creates a configuration script for a package from a template file that lists the operating system features that the package can use, in the form of M4 macro calls. This release fixes some regressions that were introduced in 2.62. It also introduces some speedups in m4sugar, avoiding some quadratic scaling inherent in certain uses of GNU M4 1.4.x. This version of Autoconf uses GPLv2+ plus an exception for its installed executables, as described in COPYING; the exception covers the implications of including an autoconf-generated script in your project. Meanwhile, several source files within the Autoconf project are under GPLv3+, as described in COPYINGv3; these files are used for building and installing Autoconf, but are not present in the installed programs. The entire Autoconf project will move to GPLv3+ when the exception statements have been reformulated in terms of the Additional Permissions as described in section 7 of GPLv3. Please report any problems to the bug-autoconf@xxxxxxx mailing list. In particular, if 'make check' fails, attaching the resulting file tests/testsuite.log is an integral part of a good bug report. 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First, be sure to download both the .sig file and the corresponding tarball. Then, run a command like this: gpg --verify autoconf-2.63.tar.gz.sig If that command fails because you don't have the required public key, then run this command to import it: gpg --keyserver keys.gnupg.net --recv-keys F4850180 and rerun the `gpg --verify' command. This release was bootstrapped with the following tools: Automake 1.10.1 Alternatively, you can fetch the unbootstrapped source code with git by using the following command: $ git clone git://git.savannah.gnu.org/autoconf.git $ cd autoconf $ git checkout v2.63 ./NEWS * Major changes in Autoconf 2.63 (2008-09-09) [stable] Released by Eric Blake, based on git versions 2.62.*. ** AC_C_BIGENDIAN does not mistakenly report "universal" for some bigendian hosts, a regression introduced with universal binary support in 2.62. ** AC_PATH_X now includes /lib64 and /usr/lib64 in its list of default library directories. ** AC_USE_SYSTEM_EXTENSIONS no longer conflicts with an external AC_DEFINE([__EXTENSIONS__]). This fixes a regression introduced in 2.62 when using macros such as AC_AIX that were made obsolete in favor of the more portable AC_USE_SYSTEM_EXTENSIONS. ** AC_CHECK_TARGET_TOOLS is usable in the non-cross-compile case. ** Newly obsolete macros The following macro has been marked obsolete, since current porting targets can safely assume C89 semantics that signal handlers return void. We have no current plans to remove the macro. AC_TYPE_SIGNAL ** The macros m4_map and m4_map_sep now ignore any list elements consisting of just empty quotes, and m4_map_sep now expands its separator. This fixes a regression in 2.62 when these macros were first documented, for the sake of clients expecting the semantics that these macros had prior to that time. The new macros m4_mapall and m4_mapall_sep, along with extra quoting of the separator, can be used to get the semantics that m4_map_sep had in 2.62. ** Clients of m4_expand, such as AS_HELP_STRING and AT_SETUP, can now handle properly quoted but otherwise unbalanced parentheses (for some macros, this fixes a regression in 2.62). ** Two new quadrigraphs have been introduced: @{:@ for (, and @:}@ for ), allowing the output of unbalanced parentheses in more contexts. ** The following m4sugar macros are new: m4_joinall m4_mapall m4_mapall_sep m4_reverse m4_set_add m4_set_add_all m4_set_contains m4_set_contents m4_set_delete m4_set_difference m4_set_dump m4_set_empty m4_set_foreach m4_set_intersection m4_set_list m4_set_listc m4_set_remove m4_set_size m4_set_union ** The following m4sugar macros now accept multiple arguments, as is the case with underlying m4: m4_defn m4_popdef m4_undefine ** The following m4sugar macros now guarantee linear scaling; they previously had linear scaling with m4 1.6 but quadratic scaling when using m4 1.4.x. All macros built on top of these also gain the scaling improvements. m4_bmatch m4_bpatsubsts m4_case m4_cond m4_do m4_dquote_elt m4_foreach m4_join m4_list_cmp m4_map m4_map_sep m4_max m4_min m4_shiftn ** AT_KEYWORDS once again performs expansion on its argument, such that AT_KEYWORDS([m4_if([$1], [], [default])]) no longer complains about the possibly unexpanded m4_if [regression introduced in 2.62]. ** Config header templates `#undef UNDEFINED /* comment */' do not lead to nested comments any more; regression introduced in 2.62. -- Eric Blake, on behalf of The GNU Autoconf Team
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