Gcc requires that an unpatched, pristine version of autoconf be
used when preparing patches for official submission. For various
reasons [1] these pristine versions cannot coexist with the
existing autoconf packages in /usr.
gcc-4.3.x and gcc-4.4.x development requires autoconf-2.59
gcc-4.5.x development requires autoconf-2.64
To assist developers working within cygwin on multiple versions
of gcc, the gcc-tools-autoconf package has been restructured.
The 'gcc-tools-autoconf' package per se is now obsolete, and
serves as an upgrade helper to force installation of two new
packages:
A. gcc-tools-epoch1-autoconf
+ installs into /opt/gcc-tools/epoch1/{bin,share}
+ version autoconf-2.59
B. gcc-tools-epoch2-autoconf
+ installs into /opt/gcc-tools/epoch2/{bin,share}
+ version autoconf-2.64
Both of these new packages use the alternatives system to manage
symbolic links in /opt/gcc-tools/bin. So, developers can now
either
set PATH=/opt/gcc-tools/bin:$PATH
as has been required in the past when developing gcc on cygwin,
while using the alternatives system to ensure that the "correct"
version of the tools will be used for the gcc in question, or
set PATH=/opt/gcc-tools/epochX/bin:$PATH
and ignore the alternatives symlinks.
Autoconf is an extensible package of m4 macros that produce shell
scripts to automatically configure software source code packages.
As expected now that cygwin-1.7.1 has been officially released, this
gcc-tools-autoconf package is available exclusively for cygwin-1.7.
[1] http://cygwin.com/ml/cygwin-apps/2009-01/msg00007.html
--
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
your system. Then, run setup and answer all of the questions.
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