CMakeLists.txt: conditionally use -Wpedantic

-Wpedantic is only provided by gcc >= 4.8. Since showing pedantic warnings is not really mandatory, let's only use this option when the compiler supports it. Signed-off-by: Thomas Petazzoni <[email protected]>
quiet · Oct 10, 2018 · 8fc28b4 · 8fc28b4
1 parent ce6c17f
commit 8fc28b4
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -3,13 +3,18 @@ project(Correct C)
 include(CheckLibraryExists)
 include(CheckIncludeFiles)
 include(CheckCSourceCompiles)
+include(CheckCCompilerFlag)
 
 if(MSVC)
 set(LIBM "")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /W4")
 else(MSVC)
 set(LIBM "m")
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC -std=c99 -Wpedantic -Wall")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC -std=c99 -Wall")
+check_c_compiler_flag(-Wpedantic COMPILER_SUPPORTS_WPEDANTIC)
+if(COMPILER_SUPPORTS_WPEDANTIC)
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wpedantic")
+endif()
 if(CMAKE_BUILD_TYPE STREQUAL "Debug")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g3 -O0 -fsanitize=address")
     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-no_pie,")