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    perf tools: Fix broken build by defining _GNU_SOURCE in Makefile · 0a84f007
    David Daney 提交于
    When building on my Debian/mips system, util/util.c fails to build
    because commit 1aed2671 (perf kvm: Do
    guest-only counting by default) indirectly includes stdio.h before the
    feature selection in util.h is done.  This prevents _GNU_SOURCE in
    util.h from enabling the declaration of getline(), from now second
    inclusion of stdio.h, and the build is broken.
    
    There is another breakage in util/evsel.c caused by include ordering,
    but I didn't fully track down the commit that caused it.
    
    The root cause of all this is an inconsistent definition of _GNU_SOURCE,
    so I move the definition into the Makefile so that it is passed to all
    invocations of the compiler and used uniformly for all system header
    files.  All other #define and #undef of _GNU_SOURCE are removed as they
    cause conflicts with the definition passed to the compiler.
    
    All the features.h definitions (_LARGEFILE64_SOURCE _FILE_OFFSET_BITS=64
    and _GNU_SOURCE) are needed by the python glue code too, so they are
    moved to BASIC_CFLAGS, and the misleading comments about BASIC_CFLAGS
    are removed.
    
    This gives me a clean build on x86_64 (fc12) and mips (Debian).
    
    Cc: David Daney <david.daney@cavium.com>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Joerg Roedel <joerg.roedel@amd.com>
    Cc: Namhyung Kim <namhyung.kim@lge.com>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Link: http://lkml.kernel.org/r/1326836461-11952-1-git-send-email-ddaney.cavm@gmail.comSigned-off-by: NDavid Daney <david.daney@cavium.com>
    Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
    0a84f007
helpline.c 1.4 KB