perf_counter tools: Fix libbfd detection for systems with libz dependency
Due to a libz dependency in some distro's binutils package, C++ demangle support isn't compiled in despite the necessary libraries being available. Fix this by adding a -lz link test to the dependency detection rules. Signed-off-by: NMike Galbraith <efault@gmx.de> Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1249733655.6929.5.camel@marge.simson.net> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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