[all-commits] [llvm/llvm-project] dcdb4a: [libc][cmake] append per obj compile options inste...

[Nick Desaulniers via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: dcdb4a36ae3549fb1852b2c0089247a8d477eaf3
      https://github.com/llvm/llvm-project/commit/dcdb4a36ae3549fb1852b2c0089247a8d477eaf3
  Author: Nick Desaulniers <nickdesaulniers at users.noreply.github.com>
  Date:   2024-01-05 (Fri, 05 Jan 2024)

  Changed paths:
    M libc/cmake/modules/LLVMLibCObjectRules.cmake

  Log Message:
  -----------
  [libc][cmake] append per obj compile options instead of prepending (#77126)

This allows individual object files to override the common compile
commands in
their local CMakeLists' add_object_library call.

For example, the common compile commands contain -Wall and -Wextra.
Before
this patch, the per object COMPILE_OPTIONS were prepended to these, so
that
builds of individual object files could not individually disable
specific
diagnostics from those groups explicitly.

After this patch, the per-object file compile objects are appended to
the list
of compiler flags, enabling this use case.

ARGN is a bit of cmake magic; let's be explicit in the APPEND that we're
appending the compile options.

Link: #77007