[Build]: Fix MinGW DLL copying in Windows CI

.github/workflows/ci-linux.yml

@@ -47,7 +47,7 @@ jobs:
     - name: Install dependencies
       run: |
         sudo apt-get update
-        sudo apt-get install -y ninja-build xvfb xorg-dev libgl1-mesa-dev libglu1-mesa-dev libgl1-mesa-dri
+        sudo apt-get install -y xorg-dev libgl1-mesa-dev libglu1-mesa-dev libgl1-mesa-dri
       shell: bash
 
     - name: Install GCC 16

.github/workflows/ci-macos.yml

@@ -32,11 +32,6 @@ jobs:
       with:
         submodules: 'recursive'
 
-    - name: Install ninja-build
-      run: |
-        brew install ninja
-      shell: bash
-
     - name: Setup ccache
       uses: hendrikmuhs/ccache-action@v1.2
       with:

.github/workflows/ci-windows.yml

@@ -130,15 +130,6 @@ jobs:
       working-directory: build/tests
       run: |
         set -o pipefail
-        if [ "${{ matrix.compiler }}" == "gcc" ]; then
-            # For MinGW - copy DLLs directly (no PATH manipulation)
-            GCC_DIR=$(dirname $(which gcc))
-            echo "GCC directory: $GCC_DIR"
-            echo "Copying DLLs from $GCC_DIR"
-            cp "$GCC_DIR"/libgcc*.dll . 2>/dev/null || echo "No libgcc DLLs found"
-            cp "$GCC_DIR"/libstdc*.dll . 2>/dev/null || echo "No libstdc DLLs found"
-            cp "$GCC_DIR"/libwinpthread*.dll . 2>/dev/null || echo "No libwinpthread DLLs found"
-        fi
         echo "Running gamecoe tests"
         ./gamecoe_tests.exe | tee test_output.log
         # testcoe currently reports a skipped test as failed. Narrow this back to skips only

cmake/utils.cmake

@@ -13,4 +13,46 @@ function(copy_gamecoe_assets_to_build_root exe)
         COMMENT "[gamecoe] Copying gamecoe assets to build root"
         WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
     )
+endfunction()
+
+# Automatically copies required MinGW DLLs to target directory on Windows
+
+function(gamecoe_copy_mingw_dlls_to_target target_name)
+    if(WIN32 AND CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+        message(STATUS "[gamecoe] Setting up automatic MinGW DLL copying for ${target_name}")
+
+        # Get the compiler directory
+        get_filename_component(COMPILER_DIR ${CMAKE_CXX_COMPILER} DIRECTORY)
+
+        # List of DLLs that might be needed for MinGW
+        set(MINGW_DLLS
+            libgcc_s_seh-1.dll     # 64-bit SEH exception handling
+            libgcc_s_dw2-1.dll     # 32-bit Dwarf2 exception handling
+            libstdc++-6.dll        # C++ standard library
+            libwinpthread-1.dll    # Threading support
+        )
+
+        foreach(dll ${MINGW_DLLS})
+            set(dll_path "${COMPILER_DIR}/${dll}")
+            if(EXISTS "${dll_path}")
+                message(STATUS "[gamecoe] Found ${dll} at ${dll_path}")
+                add_custom_command(TARGET ${target_name} POST_BUILD
+                    COMMAND ${CMAKE_COMMAND} -E copy_if_different
+                    "${dll_path}"
+                    "$<TARGET_FILE_DIR:${target_name}>/${dll}"
+                    COMMENT "[gamecoe] Copying MinGW DLL: ${dll}"
+                    VERBATIM
+                )
+            else()
+                message(STATUS "[gamecoe] ${dll} not found, skipping")
+            endif()
+        endforeach()
+    endif()
+endfunction()
+
+# Alternative function for multiple targets
+function(gamecoe_copy_mingw_dlls_to_targets)
+    foreach(target_name ${ARGN})
+        gamecoe_copy_mingw_dlls_to_target(${target_name})
+    endforeach()
 endfunction()

tests/CMakeLists.txt

@@ -37,6 +37,8 @@ if(WIN32)
         COMMAND_EXPAND_LISTS)
 endif()
 
+gamecoe_copy_mingw_dlls_to_target(gamecoe_tests)
+
 # game::create() needs soundcoe's default audio root to exist next to the test binary
 if(GAMECOE_USE_SOUNDCOE)
     add_custom_command(TARGET gamecoe_tests POST_BUILD