• Wang Nan's avatar
    perf clang: Add builtin clang support ant test case · 00b86691
    Wang Nan authored
    Add basic clang support in clang.cpp and test__clang() testcase. The
    first testcase checks if builtin clang is able to generate LLVM IR.
    
    tests/clang.c is a proxy. Real testcase resides in
    utils/c++/clang-test.cpp in c++ and exports C interface to perf test
    subsystem.
    
    Test result:
    
       $ perf test -v clang
       51: builtin clang support                               :
       51.1: Test builtin clang compile C source to IR              :
       --- start ---
       test child forked, pid 13215
       test child finished with 0
       ---- end ----
       Test builtin clang support subtest 0: Ok
    
    Committer note:
    
    Make sure you've enabled CLANG and LLVM builtin support by setting
    the LIBCLANGLLVM variable on the make command line, e.g.:
    
      make LIBCLANGLLVM=1 O=/tmp/build/perf -C tools/perf install-bin
    
    Otherwise you'll get this when trying to do the 'perf test' call above:
    
      # perf test clang
      51: builtin clang support                      : Skip (not compiled in)
      #
    Signed-off-by: default avatarWang Nan <wangnan0@huawei.com>
    Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    Cc: Alexei Starovoitov <ast@fb.com>
    Cc: He Kuang <hekuang@huawei.com>
    Cc: Jiri Olsa <jolsa@kernel.org>
    Cc: Joe Stringer <joe@ovn.org>
    Cc: Zefan Li <lizefan@huawei.com>
    Cc: pi3orama@163.com
    Link: http://lkml.kernel.org/r/20161126070354.141764-11-wangnan0@huawei.com
    [ Removed "Test" from descriptions, redundant and already removed from all the other entries ]
    Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    00b86691
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