From: Hajin Jang <jb6804@naver.com>
Date: Mon, 25 Sep 2023 17:15:10 +0000 (+0900)
Subject: Detect -Wno-pedantic-ms-format support in mingw
X-Git-Tag: 2.1.4~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a6139b349108f40f1b570e7ed49102d46e284a9d;p=thirdparty%2Fzlib-ng.git

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 6b53e8c8..974af49c 100644
--- 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()