[OE-core] [PATCH 1/7] elfutils: fix builds with gcc 4.6

[Khem Raj]

On Tue, Apr 5, 2011 at 9:46 AM, Joshua Lock <josh at linux.intel.com> wrote:
> On Mon, 2011-04-04 at 18:58 -0700, Khem Raj wrote:
>> On 4/1/2011 6:51 AM, Joshua Lock wrote:
>> > From: Joshua Lock<josh at linux.intel.com>
>> >
>> > gcc 4.6 (as used in Fedora 15) adds some extra warnings which are
>> > included with Werror. The new unused-but-set variable warning causes
>> > an error in libasm of elfutils. Work around this by removing
>> > unused-but-set from Werror.
>> >
>> > Signed-off-by: Joshua Lock<josh at linux.intel.com>
>> > ---
>> >   meta/recipes-devtools/elfutils/elfutils_0.148.bb |    4 ++++
>> >   1 files changed, 4 insertions(+), 0 deletions(-)
>> >
>> > diff --git a/meta/recipes-devtools/elfutils/elfutils_0.148.bb b/meta/recipes-devtools/elfutils/elfutils_0.148.bb
>> > index b2f700e..c395be8 100644
>> > --- a/meta/recipes-devtools/elfutils/elfutils_0.148.bb
>> > +++ b/meta/recipes-devtools/elfutils/elfutils_0.148.bb
>> > @@ -40,6 +40,10 @@ SRC_URI += "\
>> >
>> >   inherit autotools
>> >
>> > +# GCC 4.6.0 raises an unused-but-set warning in libasm, for now remove
>> > +# this warning from Werror
>> > +CFLAGS_virtclass-native += "-Wno-error=unused-but-set-variable"
>> > +
>>
>> unused-but-set-variable is a new option in gcc 4.6 which means this will
>> cause problems with older gcc's as they wont recognize this option and
>> not all distros have gcc 4.6
>> as base compiler. Have you tried compiling this patchset on a build
>> machine which has older gcc ? say 4.5
>
> I had not but thanks for pointing this out. I'll work up a new patch and
> make sure to test it on a machine with an older GCC.
>

IMO either disabling Werror completely or fixing the problem are only
two alternatives

> Cheers,
> Joshua
> --
> Joshua Lock
>        Yocto Build System Monkey
>        Intel Open Source Technology Centre
>
>
> _______________________________________________
> Openembedded-core mailing list
> Openembedded-core at lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
>