[compiler-rt] r205256 - InstrProf: Add simple compiler-rt test

[Duncan P. N. Exon Smith]

On 2014 Apr 1, at 01:12, Alexey Samsonov <samsonov at google.com> wrote:

> Hi Duncan,
> We see the following error on our (still private) Mac buildbot. Do you have an idea what might be wrong?
> 
> Script:
> --
> /Users/buildbot/src/llvm-buildbot/slave/mac10.9-cmake/build/llvm_build64/bin/clang -fprofile-instr-generate -o /Users/buildbot/src/llvm-buildbot/slave/mac10.9-cmake/build/compiler_rt_build/test/profile/Output/instrprof-basic.c.tmp -O3 -flto  /Users/buildbot/src/llvm-buildbot/slave/mac10.9-cmake/build/llvm/projects/compiler-rt/test/profile/instrprof-basic.c
> env LLVM_PROFILE_FILE=/Users/buildbot/src/llvm-buildbot/slave/mac10.9-cmake/build/compiler_rt_build/test/profile/Output/instrprof-basic.c.tmp.profraw /Users/buildbot/src/llvm-buildbot/slave/mac10.9-cmake/build/compiler_rt_build/test/profile/Output/instrprof-basic.c.tmp
> llvm-profdata merge -o /Users/buildbot/src/llvm-buildbot/slave/mac10.9-cmake/build/compiler_rt_build/test/profile/Output/instrprof-basic.c.tmp.profdata /Users/buildbot/src/llvm-buildbot/slave/mac10.9-cmake/build/compiler_rt_build/test/profile/Output/instrprof-basic.c.tmp.profraw
> /Users/buildbot/src/llvm-buildbot/slave/mac10.9-cmake/build/llvm_build64/bin/clang -fprofile-instr-use=/Users/buildbot/src/llvm-buildbot/slave/mac10.9-cmake/build/compiler_rt_build/test/profile/Output/instrprof-basic.c.tmp.profdata -o - -S -emit-llvm /Users/buildbot/src/llvm-buildbot/slave/mac10.9-cmake/build/llvm/projects/compiler-rt/test/profile/instrprof-basic.c | FileCheck /Users/buildbot/src/llvm-buildbot/slave/mac10.9-cmake/build/llvm/projects/compiler-rt/test/profile/instrprof-basic.c
> --
> Exit Code: 1
> 
> Command Output (stderr):
> --
> ld: warning: ignoring file /var/tmp/instrprof-basic-164f0d.o, lto file was built for x86_64 which is not the architecture being linked (x86_64): /var/tmp/instrprof-basic-164f0d.o
> Undefined symbols for architecture x86_64:
>   "_main", referenced from:
>      implicit entry/start for main executable
> ld: symbol(s) not found for architecture x86_64
> clang-3.5: error: linker command failed with exit code 1 (use -v to see invocation)

Mysterious.  I'm on 10.9 myself and I'm not seeing that error.

If you send me the output of:

    $ ld -v
    $ /Users/buildbot/src/llvm-buildbot/slave/mac10.9-cmake/build/llvm_build64/bin/clang -fprofile-instr-generate -o /Users/buildbot/src/llvm-buildbot/slave/mac10.9-cmake/build/compiler_rt_build/test/profile/Output/instrprof-basic.c.tmp -O3 -flto  /Users/buildbot/src/llvm-buildbot/slave/mac10.9-cmake/build/llvm/projects/compiler-rt/test/profile/instrprof-basic.c -###

I can look into it.

If this is blocking you, go ahead and remove -flto from the test
until we sort this out (please add a FIXME though).