feature: CI build for msys2, it should painlessly build with msys2 now

.github/workflows/MSYS2.yml

@@ -0,0 +1,82 @@
+name: CI Windows (MSYS2)
+
+on:
+  push:
+  pull_request:
+  repository_dispatch:
+    types: [run_build]
+
+permissions:
+  contents: read
+
+jobs:
+  msys2-build-test:
+    strategy:
+      fail-fast: false
+      matrix:
+        sys: [MINGW64, UCRT64]
+    runs-on: windows-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up MSYS2
+        uses: msys2/setup-msys2@v2
+        with:
+          msystem: ${{ matrix.sys }}
+          update: true
+          install: base-devel git
+          pacboy: >-
+            gettext:p
+            gobject-introspection:p
+            graphite2:p
+            p11-kit:p
+            qt6:p
+            qt6-3d:p
+            qt6-charts:p
+            qt6-datavis3d:p
+            qt6-imageformats:p
+            qt6-location:p
+            qt6-lottie:p
+            qt6-networkauth:p
+            qt6-quick3dphysics:p
+            qt6-quicktimeline:p
+            qt6-remoteobjects:p
+            qt6-scxml:p
+            qt6-sensors:p
+            qt6-serialbus:p
+            qt6-speech:p
+            qt6-tools:p
+            qt6-translations:p
+            qt6-virtualkeyboard:p
+            qt6-webchannel:p
+            qt6-websockets:p
+            x264:p
+
+      - name: Configure and build RetroArch
+        shell: msys2 {0}
+        run: |
+          echo "Building RetroArch in ${{ matrix.sys }} environment"
+          ./configure
+          make -j$(nproc)
+
+      - name: Run tests (if any)
+        shell: msys2 {0}
+        run: |
+          echo "Running tests in ${{ matrix.sys }} environment"
+          make check
+
+      - name: Collect DLLs and binaries
+        shell: msys2 {0}
+        run: |
+          echo "Collecting DLLs and binaries"
+          mkdir -p dist
+          cp retroarch.exe dist/
+          ldd retroarch.exe | grep "${{ matrix.sys }}" | awk '{print $3}' | grep -i "/${{ matrix.sys | lower }}/bin/" | xargs -I {} cp {} dist/
+
+      - name: Archive build artifacts
+        if: success()
+        uses: actions/upload-artifact@v4
+        with:
+          name: retroarch-${{ matrix.sys }}
+          path: dist/

Makefile.common

@@ -2648,4 +2648,26 @@ ifeq ($(HAVE_ODROIDGO2), 1)
          gfx/drivers/oga_gfx.o
 endif
 
+
+ifneq ($(findstring Win32,$(OS)),)
+# This block executes only if $(OS) contains "Win32"
+NT_VERSION := $(shell echo "#include <windows.h>" > temp.c; \
+               echo "#ifdef _WIN32_WINNT" >> temp.c; \
+               echo "#define GET_MACRO_VALUE(x) #x" >> temp.c; \
+               echo "#define EXPAND_MACRO_VALUE(x) GET_MACRO_VALUE(x)" >> temp.c; \
+               echo "#pragma message (\"_WIN32_WINNT=\" EXPAND_MACRO_VALUE(_WIN32_WINNT))" >> temp.c; \
+               echo "#endif" >> temp.c; \
+               $(CC) -c temp.c 2>&1 | sed -n 's/^.*_WIN32_WINNT=\(0x[0-9A-Fa-f]\+\).*/\1/p'; \
+               rm -f temp.c temp.o)
+
+# Check if NT_VERSION is greater than 0x602
+ifneq ($(NT_VERSION),)
+ifeq ($(shell [ $$(( $(NT_VERSION) )) -gt $$(( 0x602 )) ] && echo true), true)
+LIBS += -lxaudio2_9
+endif
+else
+$(warning Windows NT version macro (_WIN32_WINNT) is not defined.)
+endif
+endif
+
 ##################################

audio/common/mmdevice_common_inline.h

@@ -20,10 +20,6 @@
 
 /* Fix for MSYS2 increasing _WIN32_WINNT to 0x0603*/
 #if defined(__MINGW32__) || defined(__MINGW64__)
-#ifdef _WIN32_WINNT
-#undef _WIN32_WINNT
-#endif
-#define _WIN32_WINNT 0x0600
 #define WIN32_LEAN_AND_MEAN
 #else
 typedef enum EDataFlow EDataFlow;