CMake: document -Werror for add_c_flag_if_supported() from #7718

3 years ago · 0a021c3bd1
parent ed506006d2
commit 0a021c3bd1
1 changed files with 2 additions and 0 deletions
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -106,6 +106,8 @@ function (die msg)
 endfunction ()

 function (add_c_flag_if_supported flag var)
+  # Prepending the flag with -Werror will only add the flag,
+  # if it doesn't result in generation of a warning of using a flag unknown to the compiler.
  set(TMP "-Werror ${flag}")
  string(REGEX REPLACE "[- ]" "_" supported ${TMP}_c)
  check_c_compiler_flag(${TMP} ${supported})