ci: experiment with new mingw clang64

.github/workflows/mingw.yml

@@ -0,0 +1,54 @@
+name: MinGW Clang64 Full Pipeline
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        profile: [RelWithDebInfo, Debug]
+
+    name: MinGW Clang64 Build (${{ matrix.profile }})
+    runs-on: windows-2025
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+
+      - name: Setup MSYS2
+        id: msys2
+        uses: msys2/setup-msys2@v2
+        with:
+          msystem: clang64
+          update: true
+          install: >-
+            git
+            mingw-w64-clang-x86_64-toolchain
+            mingw-w64-clang-x86_64-cmake
+            mingw-w64-clang-x86_64-ninja
+
+      - name: Configure
+        run: >
+          cmake -GNinja
+          -B${{github.workspace}}/build
+          -DCMAKE_BUILD_TYPE=${{ matrix.profile }}
+          -DCMAKE_CXX_COMPILER=clang++
+          -DCMAKE_C_COMPILER=clang
+
+      - name: Build
+        run: >
+          cmake 
+          --build ${{github.workspace}}/build
+          --parallel
+
+      - name: Test
+        run: |
+          cd ${{github.workspace}}/build
+          ctest
+

CMakeLists.txt

@@ -381,9 +381,10 @@ function(add_warning_flags name)
     $<$<CXX_COMPILER_ID:MSVC>:/Zi /W4 /WX /wd4127 /wd4324 /wd4201>
     $<$<NOT:$<OR:$<CXX_COMPILER_ID:MSVC>,$<STREQUAL:${CMAKE_CXX_SIMULATE_ID},MSVC>>>:-fno-rtti -Wall -Wextra -Werror -Wundef>
     $<$<CXX_COMPILER_ID:Clang>:-Wsign-conversion -Wconversion>)
+
   target_link_options(${name} PRIVATE 
     $<$<BOOL:${SNMALLOC_LINKER_SUPPORT_NO_ALLOW_SHLIB_UNDEF}>:-Wl,--no-undefined>
-    $<$<PLATFORM_ID:Windows>:$<${ci_or_debug}:/DEBUG>>)
+    $<$<PLATFORM_ID:Windows>:$<${ci_or_debug}:LINKER:/DEBUG>>)
 endfunction()
 
 # To build with just the header library target define SNMALLOC_HEADER_ONLY_LIBRARY