[poky] [PATCH 1/7] elfutils: fix builds with gcc 4.6

[Khem Raj]

On Wed, Apr 6, 2011 at 4:16 AM, Joshua Lock <josh at linux.intel.com> wrote:
> On Mon, 2011-04-04 at 23:46 +0100, Richard Purdie wrote:
>> On Mon, 2011-04-04 at 23:37 +0200, Martin Jansa wrote:
>> > On Fri, Apr 1, 2011 at 3:40 PM, Joshua Lock <josh at linux.intel.com> 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"
>> > > +
>> > >  EXTRA_OECONF = "--program-prefix=eu-"
>> >
>> > this breaks all other distros not yet using gcc-4.6..
>> >
>> >
>> > configure:2892: checking whether the C compiler works
>> > configure:2914: gcc -Wno-error=unused-but-set-variable
>> > -isystem/OE/shr-core/tmp/sysroots/x86_64-linux/usr/include
>> > -L/OE/shr-core/tmp/sysroots/x86_64-linux/usr/lib
>> > -Wl,-rpath-link,/OE/shr-core/tmp/sysroots/x86_64-linux/usr/lib
>> > -Wl,-rpath,/OE/shr-core/tmp/sysroots/x86_64-linux/usr/lib -Wl,-O1
>> > conftest.c  >&5
>> > cc1: error: -Werror=unused-but-set-variable: No option -Wunused-but-set-variable
>> > configure:2918: $? = 1
>> > configure:2956: result: no
>> > configure: failed program was:
>> > | /* confdefs.h */
>> > | #define PACKAGE_NAME "Red Hat elfutils"
>> > | #define PACKAGE_TARNAME "elfutils"
>> > | #define PACKAGE_VERSION "0.148"
>> > | #define PACKAGE_STRING "Red Hat elfutils 0.148"
>> > | #define PACKAGE_BUGREPORT "http://bugzilla.redhat.com/bugzilla/"
>> > | #define PACKAGE_URL ""
>> > | #define PACKAGE "elfutils"
>> > | #define VERSION "0.148"
>> > | #define MODVERSION "Build on jama 2011-04-04T23:34:25+0200"
>> > | /* end confdefs.h.  */
>> > |
>> > | int
>> > | main ()
>> > | {
>> > |
>> > |   ;
>> > |   return 0;
>> > | }
>> > configure:2961: error: in
>> > `/OE/shr-core/tmp/work/x86_64-linux/elfutils-native-0.148-r1/elfutils-0.148':
>> > configure:2965: error: C compiler cannot create executables
>> > See `config.log' for more details.
>
> Sorry about this Martin. Thanks for catching and reporting.
>
>>
>> Ouch, I'm going to revert this, we'll need an alternative fix. Thanks
>> for reporting!
>
> I've worked up an alternative fix and sent a pull request to oe-core. I
> took the approach of consolidating several patches from the upstream
> source repository which remove the unused variables.
>
> I consolidated them into a single patch so that they are easier to drop
> once we update elfutils to 0.152 or higher.
>

Why not update to 0.152 then

> Regards,
> Joshua
> --
> Joshua Lock
>        Yocto Build System Monkey
>        Intel Open Source Technology Centre
>
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