Windows build fixes

A few fixes to make projectMSDL build on GitHub Actions:
- Added missing "glew" vcpkg dependency (as long as we don't use a proper libprojectM vcpkg port)
- Add developer command line setup action to fix issues with multiple MSVC toolsets getting mixed up
- Enable binary package caching in vcpkg to speed up the build process

Author: kblaschke

.github/workflows/build.yaml

@@ -65,6 +65,19 @@ jobs:
     runs-on: windows-latest
 
     steps:
+      - name: Setup MSVC dev command prompt
+        uses: TheMrMilchmann/setup-msvc-dev@v3
+        with:
+          arch: x64
+          toolset: 14.38.33130
+
+      - name: Export GitHub Actions cache environment variables
+        uses: actions/github-script@v6
+        with:
+          script: |
+            core.exportVariable('ACTIONS_CACHE_URL', process.env.ACTIONS_CACHE_URL || '');
+            core.exportVariable('ACTIONS_RUNTIME_TOKEN', process.env.ACTIONS_RUNTIME_TOKEN || '');
+
       - name: Checkout libprojectM Sources
         uses: actions/checkout@v3
         with:
@@ -73,6 +86,8 @@ jobs:
           submodules: recursive
 
       - name: Build/Install libprojectM
+        env:
+          VCPKG_BINARY_SOURCES: "clear;x-gha,readwrite"
         run: |
           mkdir cmake-build-libprojectm
           cmake -G "Visual Studio 17 2022" -A "X64" -S "${{ github.workspace }}/projectm" -B "${{ github.workspace }}/cmake-build-libprojectm" -DCMAKE_TOOLCHAIN_FILE="${Env:VCPKG_INSTALLATION_ROOT}/scripts/buildsystems/vcpkg.cmake" -DVCPKG_TARGET_TRIPLET=x64-windows-static -DCMAKE_INSTALL_PREFIX="${{ github.workspace }}/install-libprojectm" -DCMAKE_MSVC_RUNTIME_LIBRARY="MultiThreaded$<$<CONFIG:Debug>:Debug>" -DCMAKE_VERBOSE_MAKEFILE=YES -DBUILD_SHARED_LIBS=OFF -DBUILD_TESTING=NO
@@ -86,6 +101,8 @@ jobs:
           submodules: recursive
 
       - name: Build projectMSDL
+        env:
+          VCPKG_BINARY_SOURCES: "clear;x-gha,readwrite"
         run: |
           mkdir cmake-build-frontend-sdl2
           cmake -G "Visual Studio 17 2022" -A "X64" -S "${{ github.workspace }}/frontend-sdl2" -B "${{ github.workspace }}/cmake-build-frontend-sdl2" -DCMAKE_TOOLCHAIN_FILE="${Env:VCPKG_INSTALLATION_ROOT}/scripts/buildsystems/vcpkg.cmake" -DVCPKG_TARGET_TRIPLET=x64-windows-static  -DCMAKE_PREFIX_PATH="${{ github.workspace }}/install-libprojectm" -DCMAKE_INSTALL_PREFIX="${{ github.workspace }}/install-frontend-sdl2" -DCMAKE_MSVC_RUNTIME_LIBRARY="MultiThreaded$<$<CONFIG:Debug>:Debug>" -DCMAKE_VERBOSE_MAKEFILE=YES -DSDL2_LINKAGE=static -DBUILD_TESTING=YES

vcpkg.json

@@ -1,6 +1,7 @@
 {
   "$schema": "https://raw.githubusercontent.com/microsoft/vcpkg-tool/main/docs/vcpkg.schema.json",
   "dependencies": [
+    "glew",
     "sdl2",
     "poco",
     "freetype"