[all-commits] [llvm/llvm-project] e6c328: [CMake][Release] Disable PGO (#88465) (#89000)

[Tom Stellard via All-commits]

  Branch: refs/heads/release/18.x
  Home:   https://github.com/llvm/llvm-project
  Commit: e6c3289804a67ea0bb6a86fadbe454dd93b8d855
      https://github.com/llvm/llvm-project/commit/e6c3289804a67ea0bb6a86fadbe454dd93b8d855
  Author: Tom Stellard <tstellar at redhat.com>
  Date:   2024-04-16 (Tue, 16 Apr 2024)

  Changed paths:
    M clang/cmake/caches/Release.cmake

  Log Message:
  -----------
  [CMake][Release] Disable PGO (#88465) (#89000)

Running the test-release.sh script with PGO enabled causes build errors
like:

ld.lld: error: Function Import: link error: linking module flags
'ProfileSummary': IDs have conflicting values

I believe this a build system bug due to the PGO profile data being
generated unconditionally. If you run `ninja check-all` and then `ninja
install` like we do in test-release.sh, then the profile data is
regenerated during `ninja install` and some of the clang tools which are
not test dependencies get build during the ninja install step with
different profile data. When these tools link against the LLVM
libraries, like libSupport, we end up with these errors.

(cherry picked from commit 0d2bb7f017f13ceae793fab7d83d3e67e8d8d8f8)



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications