[all-commits] [llvm/llvm-project] ac1143: [libc] Fix missing sysroot path for kernel headers...

[Mikhail R. Gadelha via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ac11430983d0d89b7ccd8e10a1a3d02ad7e2208d
      https://github.com/llvm/llvm-project/commit/ac11430983d0d89b7ccd8e10a1a3d02ad7e2208d
  Author: Mikhail R. Gadelha <mikhail at igalia.com>
  Date:   2024-07-19 (Fri, 19 Jul 2024)

  Changed paths:
    M libc/cmake/modules/LLVMLibCCompileOptionRules.cmake
    M libc/src/time/linux/nanosleep.cpp

  Log Message:
  -----------
  [libc] Fix missing sysroot path for kernel headers when crosscompiling (#99588)

When crosscompiling, we need to search for the linux kernel headers in the sysroot but since #97486 the linux kernel headers were always searched in /usr/include.

This patch fixes this behaviour by prepending a '=' to where we search for the kernel headers. As per the gcc/clang's documentation a '=' before the path is replaced by the sysroot.

This patch also includes a fix for rv32, that fails to compile due to a missing definition of CLOCK_REALTIME after this change.



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