Updated: autoconf2.5-2.68-1

Charles Wilson cygwin@cwilson.fastmail.fm
Sat Jan 15 15:19:00 GMT 2011

Autoconf is an extensible package of m4 macros that produce shell
scripts to automatically configure software source code packages.  The
autoconf2.5 package contains the latest edition of autoconf in the 2.5x
release sequence (which includes 2.60, 2.61, etc).

Changes since autoconf2.5-2.67-1
* update to latest upstream release
  + see list of upstream changes below
* Include applicable portions of Debian patchset 2.67-2

Testsuite results:
ERROR: 478 tests behaved as expected.

Note: there were some initial failures
    38: autotools and whitespace in file names FAILED (tools.at:1312)
   135: at_status                              FAILED (autotest.at:428)
   185: Longer test title in a test title      FAILED (autotest.at:860)
but when re-run, they passed. Mostly caused by transient cygwin
issues, such as fork/child failures or zombies preventing cleanup.

Note that the parallel tests, some of which failed in 2.65 and 2.67
on cygwin, now pass.

The tests were executed with LANG=en_US.UTF-8

Upstream changes (2.68):
The GNU Autoconf team is pleased to announce the stable release of
Autoconf 2.67.  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 a few regressions introduced in previous releases,
and is primarily focused on bug fixes.  It also includes a few new
features, documented below.

* Noteworthy changes in release 2.68 (2010-09-22) [stable]
  Released by Eric Blake, based on git versions 2.67.*.

** AC_MSG_ERROR (and AS_ERROR) can once again be followed immediately by
   `dnl'.  Regression introduced in 2.66.

** AC_INIT again allows URLs with '?' for its BUG-REPORT argument.
   Regression introduced in 2.66.

** AC_REPLACE_FUNCS again allows a non-literal argument, such as a shell
   variable that expands to a list of functions to check.  Regression
   introduced in 2.66.

** AT_BANNER() with empty argument will cause visual separation from
   previous test category.

   AC_RUN_IFELSE now warn if the first argument failed to use
   AC_LANG_SOURCE or AC_LANG_PROGRAM to generate the conftest file
   contents.  A new macro AC_LANG_DEFINES_PROVIDED exists if you have
   a compelling reason why you cannot use AC_LANG_SOURCE but must
   avoid the warning.

** The macro m4_define_default is now documented.

** Symlinked config.cache files are supported; configure now tries to
   update non-symlinked cache files atomically, so that concurrent
   configure runs do not leave behind broken cache files. It is still
   unspecified which subset or union of results is cached though.

** Autotest testsuites should not contain long text lines any more, and
   be portable even when very many test groups are used.

** AT_CHECK semantics with respect to the Autotest variable $at_status
   and shell execution environment of the arguments are documented now.

** AC_FC_LIBRARY_LDFLAGS now tolerates output from newer gfortran.

** Newly obsolete macros
   The following macros have been marked obsolete.  New programs
   should use the corresponding Gnulib modules.  Gnulib not only
   detects a larger set of portability problems with these functions,
   but also provides complete workarounds.


Charles Wilson
volunteer autoconf maintainer for cygwin


To update your installation, click on the "Install Cygwin now" link
on the http://cygwin.com/ web page.  This downloads setup.exe to
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New in 2.65
* Major changes in Autoconf 2.65 (2009-11-21) [stable]
  Released by Eric Blake, based on git versions 2.64.*.

** Autoconf is now licensed under the General Public License version 3
   or later (GPLv3+).  As with earlier versions, the license includes
   an exception clause so that you may release a configure script
   generated by autoconf under the license of your own program.

** New macros to support Objective C++.

** The following undocumented autoconf macros, removed in Autoconf 2.64,
   have been reinstated:

   These macros are present only for backwards compatibility purposes.

** The macro AC_LANG_COMPILER no longer fails on embedded systems that
   lack fopen in the C library, such as AVR or RTEMS (regression
   introduced in 2.64).

** The AC_FC_FREEFORM macro no longer suffers from a whitespace bug that
   made it fail with some Fortran compilers (regression introduced in

** The AC_TYPE_UINT64_T and AC_TYPE_INT64_T macros have been fixed to no
   longer mistakenly select a 32-bit type on some compilers (bug present
   since macros were introduced in 2.59c).

** The AC_FUNC_MMAP macro has been fixed to be portable to systems like
   Cygwin (bug present since macro was introduced in 2.0).

** The following documented autotest macros are new:

** The following m4sugar macros now quote their expansion:
   m4_toupper  m4_tolower

** The following m4sugar macros are new:

** The m4sugar macro m4_text_wrap now copes with embedded quoting without
   requiring quadrigraphs.  For uses like AC_ARG_VAR([a], [[b c]]),
   this gives the intuitive behavior of "[b c]" in the output (2.63
   gave the output of "[b], [c]", and 2.64 encountered a failure).

** The `$tmp' temporary directory used in config.status is documented for
   public use now.

** config.status now provides a --config option to produce the configuration.

** Many cache variables used by Autoconf's macros are now documented.

** Configure scripts work better on DJGPP by avoiding a bug present in
   the DJGPP port of bash 2.04 in handling 'return' in a shell
   function (regression introduced in 2.64).

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