cmake: treat warnings as error in compiler flag tests

3 years ago · 2e9af2a1c8
parent db564efe0b
commit 2e9af2a1c8
1 changed files with 6 additions and 4 deletions
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -71,16 +71,18 @@ function (die msg)
 endfunction ()

 function (add_c_flag_if_supported flag var)
-  string(REPLACE "-" "_" supported ${flag}_c)
-  check_c_compiler_flag(${flag} ${supported})
+  set(TMP "-Werror ${flag}")
+  string(REGEX REPLACE "[- ]" "_" supported ${TMP}_c)
+  check_c_compiler_flag(${TMP} ${supported})
  if(${${supported}})
    set(${var} "${${var}} ${flag}" PARENT_SCOPE)
  endif()
 endfunction()

 function (add_cxx_flag_if_supported flag var)
-  string(REPLACE "-" "_" supported ${flag}_cxx)
-  check_cxx_compiler_flag(${flag} ${supported})
+  set(TMP "-Werror ${flag}")
+  string(REGEX REPLACE "[- ]" "_" supported ${TMP}_cxx)
+  check_cxx_compiler_flag(${TMP} ${supported})
  if(${${supported}})
    set(${var} "${${var}} ${flag}" PARENT_SCOPE)
  endif()