[PATCH] D105217: [LLD] Adding support for RELA for CG Profile.

[Fangrui Song via Phabricator via llvm-commits]

MaskRay added a comment.

First, `.llvm.call-graph-profile` is only emitted by -fprofile-use= and -fprofile-sample-use=, instrumentation PGO and sample PGO.
The use case is very specific. For sample PGO/BOLT there are other requirements from an external tool converting linux-perf data to a profile format recognized by llvm-project.
I can imagine that BOLT may have more requirements on LLVM tooling.
So I don't see why requiring llvm-strip will be another hindrance.
Also keep in mind that GNU binutils doesn't recognize the section type SHT_LLVM_*. (Folks have added dumping support to llvm-readobj.)

> Second is how caching of object files works within the build system. It allows flexibility for projects to re-use objects with and without debug information.

If linker input size is not a concern, you may use `ld -S` instead of `strip -S` on .o files.


Repository:
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  https://reviews.llvm.org/D105217/new/

https://reviews.llvm.org/D105217