[llvm-dev] Not able to use PGO with LLVM+Clang built from source

[Diego Novillo via llvm-dev]

Yes, you are missing compiler-rt.  If you don't build compiler-rt, you will
not be able to use PGO.

On Tue, Jul 12, 2016 at 5:40 AM vivek pandya via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hello,
>
> When I try to use -fprofile-instr-generate with clang (which is built from
> source) I am getting following error :
>
> ld: file not found:
> /Users/Mr.Pandya/My_Stuff/Active/llvm/build/bin/../lib/clang/3.9.0/lib/darwin/libclang_rt.profile_osx.a
> clang-3.9: error: linker command failed with exit code 1 (use -v to see
> invocation)
>
> I am not building compiler RT with LLVM.
>
> Am I missing any thing while building llvm/clang ?
>
> Sincerely,
> Vivek
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