Detect -Wno-pedantic-ms-format support in mingw

Use check_c_compiler_flag() feature of CMake to figure out whether this
mingw toolchain has support for -Wno-pedantic-ms-format or not.
This flag will be added only if the toolchain supports it.
Currently, MinGW-w64 GCC has it, and llvm-mingw does not have it.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6b53e8c8974026097543815b7758aae7f010f7e2..974af49ca5447932eaa1da744dec05d5d37c88ba 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -239,9 +239,9 @@ elseif(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
         endif()
     endif()
     if(MINGW)
-        # Add `-Wno-pedantic-ms-format` only if the toolchain is GCC MinGW-w64
-        # llvm-mingw does not support '-Wno-pedantic-ms-format'
-        if(CMAKE_C_COMPILER_ID MATCHES "GNU")
+        # Add `-Wno-pedantic-ms-format` only if the toolchain supports it
+        check_c_compiler_flag(-Wno-pedantic-ms-format HAVE_NO_PEDANTIC_MS_FORMAT)
+        if(HAVE_NO_PEDANTIC_MS_FORMAT)
             list(APPEND WARNFLAGS_DISABLE -Wno-pedantic-ms-format)
         endif()
     endif()