[compiler-rt] r250200 - [PGO]: Eliminate calls to __llvm_profile_register_function for Linux.

[Rafael Espíndola via llvm-commits]

On 16 October 2015 at 12:20, Xinliang David Li <davidxl at google.com> wrote:
> I don't see issues with both gold and gnu ld. Note that the start and
> stop symbols in the runtime are hidden and libclang_profile.a is
> statically linked into each shared library (each shared lib has its
> own copy).

Ah, now I see that the declaration is hidden.

Note that gold and lld do the right thing, but bfd does not:

Given
        .section bar, "a"
        .hidden __start_bar
        .quad __start_bar

Both gold and lld produce a R_X86_64_RELATIVE, bfd produces a R_X86_64_64.

Cheers,
Rafael