Re: [tip:perf/urgent] perf tools: Fix the NO_64BIT build on pure 64-bit systems

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On Wed, 14 Oct 2009 08:20:52 +0200 Ingo Molnar wrote:

> 
> * Randy Dunlap <randy.dunlap@xxxxxxxxxx> wrote:
> 
> > On Mon, 12 Oct 2009 08:34:16 GMT tip-bot for Ingo Molnar wrote:
> > 
> > > Commit-ID:  55621ccf2b7a8afe39df8c80f55b28424fd07d13
> > > Gitweb:     http://git.kernel.org/tip/55621ccf2b7a8afe39df8c80f55b28424fd07d13
> > > Author:     Ingo Molnar <mingo@xxxxxxx>
> > > AuthorDate: Mon, 12 Oct 2009 09:57:25 +0200
> > > Committer:  Ingo Molnar <mingo@xxxxxxx>
> > > CommitDate: Mon, 12 Oct 2009 10:00:27 +0200
> > > 
> > > perf tools: Fix the NO_64BIT build on pure 64-bit systems
> > > 
> > > Randy Dunlap reported that 'make NO_64BIT=1' fails to build
> > > a pure 32-b it binary on 64-bit/64-bit x86 systems.
> > > 
> > > The reason is that we dont pass in the -m32 and GCC defaults
> > > to -m64.
> > > 
> > > So pass it in - and also extend the warning message about libelf
> > > dependencies - glibc-dev[el] is needed as well beyond the libelf
> > > library.
> > 
> > Ingo, thanks, I finally got this working, after installing more 32-bit
> > libs etc., like Kyle said that I would need to do.
> > 
> > The error message is still a little misleading/confusing:
> > Makefile:426: *** No libelf.h/libelf found, please install libelf-dev/elfutils-libelf-devel and glibc-dev[el].  Stop.
> > 
> > when elfutils-libelf-devel.i586 is installed but glibc-devel.i[56]86 is not
> > installed.  gcc failed with:
> > In file included from /usr/include/features.h:376,
> >                  from /usr/include/sys/types.h:27,
> >                  from /usr/include/libelf.h:53,
> >                  from elfdeveltest.c:1:
> > /usr/include/gnu/stubs.h:7:27: error: gnu/stubs-32.h: No such file or directory
> 
> Why is it misleading? It says it very clearly that you need to install 
> both:
> 
>   please install libelf-dev/elfutils-libelf-devel and glibc-dev[el].  Stop.

It also says very clearly:

Makefile:426: *** No libelf.h/libelf found

which is not correct.

---
~Randy
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