[all-commits] [llvm/llvm-project] 95bb95: [LLD][ELF] Fix compressed-debug-level test on SystemZ

[Ulrich Weigand via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 95bb95ebe44882854aeb47f8b3a6a38e775d8232
      https://github.com/llvm/llvm-project/commit/95bb95ebe44882854aeb47f8b3a6a38e775d8232
  Author: Ulrich Weigand <ulrich.weigand at de.ibm.com>
  Date:   2023-05-05 (Fri, 05 May 2023)

  Changed paths:
    M lld/test/ELF/lit.local.cfg
    M lld/test/lit.site.cfg.py.in

  Log Message:
  -----------
  [LLD][ELF] Fix compressed-debug-level test on SystemZ

The libz compression library on SystemZ by default makes use of the
platform's hardware-accelerated compression facility. This is much
faster than the regular software implementation, but often results in
slightly different outputs. This causes failures with the
compressed-debug-level test case.

To fix this, set the DFLTCC environment variable to zero while running
tests on SystemZ, which prevents use of hardware compression and falls
back to the software implementation.

Reviewed by: MaskRay

Differential Revision: https://reviews.llvm.org/D149273