Hi all,
This cycle, Dave and I are planning for the last ever release of
gnome-common. A lot of its macros for deprecated technologies
(scrollkeeper?!) have been removed, and the remainder of its macros have
found better replacements in autoconf-archive[1], where they can be used
by everyone, not just GNOME.
We plan to make one last release, and people are welcome to depend on it
for as long as they like. However, if you want new hotness, port to the
autoconf-archive versions of the macros; but please do it in your own
time. There will be no flag day port away from gnome-common.
Note that, for example, porting to AX_COMPILER_FLAGS is valuable, but
will probably require fixing a number of new compiler warnings in your
code due to increased warning flags. We hope this will make your code
better in the long run.
There’s a migration guide here:
https://wiki.gnome.org/Projects/GnomeCommon/Migration
We’ve tried to make the transition as easy and smooth as possible, but
there will inevitably be hiccups. Please let me know about anything
which breaks or doesn’t make sense. First person to complain about
-Wswitch-enum gets a prize.
For developers
---
When building from a tarball of a module which uses the new macros, you
will no longer need gnome-common installed. (Although you may not have
needed it before.)
When building from git, you will need m4-common[2] or
autoconf-archive[1] installed.
JHBuild bootstrap installs m4-common automatically, as does
gnome-continuous; so you don’t need to worry about that.
For packagers
---
In the 3.14.0 release, gnome-common installed some early versions of the
autoconf-archive macros which conflicted with what autoconf-archive
itself installs. It now has a --[with|without]-autoconf-archive
configure option to control this. We suggest that all packagers pass
--with-autoconf-archive if (and only if) autoconf-archive is packaged on
the distribution. See bug #747920[3].
m4-common *must not* be packaged. See its README[2]. m4-common is
essentially a caching subset of autoconf-archive.
For continuous integrators
---
Modules which use the new AX_COMPILER_FLAGS macro gain a new standard
--disable-Werror configure flag, which should be used in CI systems (and
any other system where spurious compiler warnings should _not_ cause
total failure of a build) to disable -Werror. The idea here is that
-Werror is enabled by default when building from git, and disabled by
default when building from release tarballs and in buildbots.
Philip
[1]: http://www.gnu.org/software/autoconf-archive/
[2]: https://github.com/desrt/m4-common/
[3]: https://bugzilla.gnome.org/show_bug.cgi?id=747920
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