ci: Enhance SDL2 fetching with PowerShell and dynamic CMake detection

- Switched from wget to Invoke-WebRequest for downloading SDL2
- Dynamically locate SDL2 CMake directory to handle version variations
- Improved SDL_endian.h patching with better error handling and logging
- Changed shell to pwsh for consistency

This improves reliability and cross-platform compatibility in CI builds.

Author: Geramy

.github/workflows/build.yml

@@ -1311,30 +1311,49 @@ jobs:
 
       - name: Fetch SDL2 and set SDL2_DIR
         if: matrix.sdl2 == 'ON'
+        shell: pwsh
         run: |
-          C:/msys64/usr/bin/wget.exe -qO sdl2.zip https://github.com/libsdl-org/SDL/releases/download/release-${{ matrix.s2ver }}/SDL2-devel-${{ matrix.s2ver }}-VC.zip
+          $sdlVer = "${{ matrix.s2ver }}"
+          $url = "https://github.com/libsdl-org/SDL/releases/download/release-$sdlVer/SDL2-devel-$sdlVer-VC.zip"
+          
+          Write-Host "Downloading SDL2 from $url..."
+          Invoke-WebRequest -Uri $url -OutFile "sdl2.zip"
+          
+          Write-Host "Extracting SDL2..."
           7z x sdl2.zip
-          echo "SDL2_DIR=$env:GITHUB_WORKSPACE/SDL2-${{ matrix.s2ver }}/cmake" >> $env:GITHUB_ENV
           
-          # Patch SDL_endian.h
-          # This specifically fixes the "definition of builtin function '_m_prefetch'" error
-          $headerPath = "$env:GITHUB_WORKSPACE/SDL2-${{ matrix.s2ver }}/include/SDL_endian.h"
-          if (Test-Path $headerPath) {
-             Write-Host "Found SDL_endian.h at $headerPath. Patching..."
-             $content = Get-Content $headerPath -Raw
+          # Find the CMake directory dynamically to ensure variable is correct
+          $cmakeDir = Get-ChildItem -Path . -Recurse -Filter "sdl2-config.cmake" | Select-Object -First 1 | ForEach-Object { $_.DirectoryName }
+          if ($cmakeDir) {
+            Write-Host "Found SDL2 CMake dir at: $cmakeDir"
+            echo "SDL2_DIR=$cmakeDir" >> $env:GITHUB_ENV
+          } else {
+            Write-Error "Could not find sdl2-config.cmake inside extracted files!"
+          }
+
+          # Fix _m_prefetch error
+          Write-Host "Searching for SDL_endian.h..."
+          $headerFile = Get-ChildItem -Path . -Recurse -Filter "SDL_endian.h" | Select-Object -First 1
+          
+          if ($headerFile) {
+             Write-Host "Found header at: $($headerFile.FullName)"
+             $content = Get-Content $headerFile.FullName -Raw
              
-             # Replace the conflicting line with a comment
              if ($content -match 'extern void _m_prefetch') {
                 $content = $content -replace 'extern void _m_prefetch\(void \*__P\);', '// extern void _m_prefetch(void *__P);'
-                Set-Content -Path $headerPath -Value $content
+                Set-Content -Path $headerFile.FullName -Value $content
                 Write-Host "SUCCESS: Patched _m_prefetch in SDL_endian.h"
              } else {
-                Write-Host "WARNING: _m_prefetch string not found in header. Verify SDL version."
+                Write-Host "WARNING: _m_prefetch string not found in header. It might already be patched or this version differs."
              }
           } else {
-             Write-Error "ERROR: Could not find SDL_endian.h to patch!"
+             # Debugging: List directories to see what happened
+             Write-Host "Listing root directories:"
+             Get-ChildItem -Path . -Directory | Format-Table Name
+             Write-Error "FATAL: Could not locate SDL_endian.h in the workspace."
+             exit 1
           }
-          # ----------------------------------------
+          # -------------------------------------------
 
       - name: Download ROCm nightly tarball
         run: |