[all-commits] [llvm/llvm-project] 5c1cea: [Support] Fix build for Haiku

[Serge Pavlov via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 5c1cea6f406366b85f3c200a1c48f713da4450ba
      https://github.com/llvm/llvm-project/commit/5c1cea6f406366b85f3c200a1c48f713da4450ba
  Author: Serge Pavlov <sepavloff at gmail.com>
  Date:   2021-01-28 (Thu, 28 Jan 2021)

  Changed paths:
    M llvm/lib/Support/CMakeLists.txt
    M llvm/lib/Support/Unix/Program.inc

  Log Message:
  -----------
  [Support] Fix build for Haiku

This change fixes two issues with building LLVM on Haiku. The first issue is
that LLVM requires wait4(), which on Haiku is hidden behind the _BSD_SOURCE
feature flag when using the --std=c++14 flag. Additionally, the wait4()
function is only available in libbsd.so, so this is now a dependency.

The other fix is that Haiku does not have the (non-standard) rusage.maxrss
member, so by default the used memory info will be set to 0 on this platform.

Reviewed By: sepavloff

Differential Revision: https://reviews.llvm.org/D87920

Patch by Niels Sascha Reedijk.