Mercurial > gnulib
changeset 18039:e6e2e554257c
gnulib-common.m4: change the ARFLAGS default to 'cr'
In some GNU/Linux distributions people started to compile 'ar'
binary with --enable-deterministic-archives (binutils project).
That, however, in combination with previous autotools long time
working default AR{_,}FLAGS=cru causes warnings on such
installations:
ar: `u' modifier ignored since `D' is the default (see `U')
The 'u' option (at least with GNU binutils) did small optimization
during repeated builds because it instructed 'ar' to not
open/close unchanged *.o files and to rather read their contents
from old archive file. However, its removal should not cause a
big performance hit for usual workflows.
Distributions started using --enable-deterministic-archives
knowing that it will disable the 'u', with the benefit of having
rather a bit more deterministic builds.
Also, to justify this change a bit more, keeping 'u' in ARFLAGS
could only result in many per-project changes to override
Automake's ARFLAGS default, just to silent such warnings.
* m4/gnulib-common.m4 (gl_PROG_AR_RANLIB): Set ARFLAGS='cr' if not
set already.
| author | Pavel Raiskup <praiskup@redhat.com> |
|---|---|
| date | Wed, 01 Jul 2015 09:38:35 +0200 |
| parents | d56ea4f36215 |
| children | c0bf512e0e48 |
| files | ChangeLog m4/gnulib-common.m4 |
| diffstat | 2 files changed, 14 insertions(+), 2 deletions(-) [+] |
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--- a/ChangeLog Wed Jul 01 07:25:52 2015 -0700 +++ b/ChangeLog Wed Jul 01 09:38:35 2015 +0200 @@ -1,3 +1,15 @@ +2015-07-01 Pavel Raiskup <praiskup@redhat.com> + + gnulib-common.m4: change the ARFLAGS default to 'cr' + In some GNU/Linux distributions people started to compile 'ar' + binary with --enable-deterministic-archives (binutils project). + That, however, in combination with previous autotools long time + working default AR{_,}FLAGS=cru causes warnings on such + installations: + ar: `u' modifier ignored since `D' is the default (see `U') + * m4/gnulib-common.m4 (gl_PROG_AR_RANLIB): Set ARFLAGS='cr' if not + set already. + 2015-07-01 Pavel Raiskup <praiskup@redhat.com> selinux-h: avoid double free after *getfilecon()
--- a/m4/gnulib-common.m4 Wed Jul 01 07:25:52 2015 -0700 +++ b/m4/gnulib-common.m4 Wed Jul 01 09:38:35 2015 +0200 @@ -278,12 +278,12 @@ dnl but prefer ${host}-ar over ar (useful for cross-compiling). AC_CHECK_TOOL([AR], [ar], [ar]) if test -z "$ARFLAGS"; then - ARFLAGS='cru' + ARFLAGS='cr' fi fi else if test -z "$ARFLAGS"; then - ARFLAGS='cru' + ARFLAGS='cr' fi fi AC_SUBST([AR])