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    perf tools: Fix build failure on perl script context · b581c01f
    Namhyung Kim 提交于
    On my Archlinux machine, perf faild to build like below:
    
        CC       scripts/perl/Perf-Trace-Util/Context.o
      In file included from /usr/lib/perl5/core/perl/CORE/perl.h:3905:0,
                       from Context.xs:23:
      /usr/lib/perl5/core/perl/CORE/inline.h: In function :
      /usr/lib/perl5/core/perl/CORE/cop.h:612:13: warning: declaration of 'av'
                                      shadows a previous local [-Werror-shadow]
                 AV *av =3D GvAV(PL_defgv);
                     ^
      /usr/lib/perl5/core/perl/CORE/inline.h:526:5: note: in expansion of
                                      macro 'CX_POP_SAVEARRAY'
             CX_POP_SAVEARRAY(cx);
             ^~~~~~~~~~~~~~~~
      In file included from /usr/lib/perl5/core/perl/CORE/perl.h:5853:0,
                       from Context.xs:23:
      /usr/lib/perl5/core/perl/CORE/inline.h:518:9: note:
                                      shadowed declaration is here
             AV *av;
                 ^~
    
    What I did to fix is adding '-Wno-shadow' as the error message said it's
    the cause of the failure.  Since it's from the perl (not perf) code
    base, we don't have the control so I just wanted to ignore the warning
    when compiling perl scripting code.
    
    Committer note:
    
    This also fixes the build on Fedora Rawhide.
    Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
    Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
    Cc: Jiri Olsa <jolsa@kernel.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Link: http://lkml.kernel.org/r/20160802024317.31725-1-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
    b581c01f
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