Re: [PATCH] perf: Fix library detection when building without libelf

[Arnaldo Carvalho de Melo <acme@ghostprotocols.net>]

Em Wed, Oct 23, 2013 at 10:51:09PM -0400, Patrick Palka escreveu:
> When I attempt to build perf on a system with slang but without libelf,
> 'make' would wrongly complain that the slang library could not be found.
> 
> It turns out that this was happening because we are not filtering -lelf
> from EXTLIBS early enough.  As a result, the library test for slang
> (ditto for gtk, libaudit, etc) erroneously passes -lelf to try-cc, which
> of course fails on a system without libelf.
> 
> This patch makes the filtering of -lelf from EXTLIBS occur right after
> testing for libelf support, so that the subsequent library tests will
> not erroneously pass -lelf to try-cc when building without libelf
> support.

Can you please check with the perf/core branch in my tree or Ingo's?

git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git perf/core

or Ingo's:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git perf/core

The feature detection was reworked and perhaps it is fixed there.

- Arnaldo