From 78f10dd0e0a15690fd76339ed61fc2a33e7b8e8f Mon Sep 17 00:00:00 2001
From: Gyusun Yeom <omniavinco@gmail.com>
Date: Fri, 5 Mar 2021 21:55:15 +0900
Subject: [PATCH 1/2] Fix shared library build for mingw

---
 CMakeLists.txt | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index af80c65..9b61307 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -178,13 +178,20 @@ if(glew-cmake_BUILD_SHARED)
 	endif()
 
 	target_compile_definitions(libglew_shared PRIVATE GLEW_BUILD)
+	if(MINGW)
+		if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.13)
+			target_link_options(libglew_shared PRIVATE -nostdlib)
+		else()
+			target_link_libraries(libglew_shared PRIVATE -nostdlib)
+		endif()
+	endif()
 	list(APPEND GLEW_TARGETS libglew_shared)
 endif()
 
 foreach(GLEW_TARGET ${GLEW_TARGETS})
 	target_compile_definitions(${GLEW_TARGET} PUBLIC ${DEFINITIONS})
 	target_include_directories(${GLEW_TARGET} PUBLIC ${INCLUDE_DIR})
-	target_link_libraries(${GLEW_TARGET} ${LIBRARIES})
+	target_link_libraries(${GLEW_TARGET} PUBLIC ${LIBRARIES})
 	set_target_properties(${GLEW_TARGET} PROPERTIES VERSION ${GLEW_VERSION})
 endforeach()
 

From f61e3235842d4a3ef4d7339c2bbc07462718e65a Mon Sep 17 00:00:00 2001
From: Gyusun Yeom <omniavinco@gmail.com>
Date: Fri, 5 Mar 2021 22:09:17 +0900
Subject: [PATCH 2/2] Build test with mingw

---
 .github/workflows/cmake.yml | 23 +++++++++++++++++++++++
 glew-cmake/mingw.cmake      | 16 ++++++++++++++++
 2 files changed, 39 insertions(+)
 create mode 100644 glew-cmake/mingw.cmake

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index b793141..6fd30c7 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -132,6 +132,29 @@ jobs:
       shell: bash
       run: test -e lib/libGLEW.a
 
+  build_mingw:
+    # The CMake configure and build commands are platform agnostic and should work equally
+    # well on Windows or Mac.  You can convert this to a matrix build if you need
+    # cross-platform coverage.
+    # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
+    runs-on: ubuntu-latest
+    container: ubuntu:18.04
+
+    steps:
+    - uses: actions/checkout@v2
+      
+    - name: Install dependencies
+      run: apt update && apt install -y cmake g++-mingw-w64-x86-64 make libgl1-mesa-dev libx11-dev libxext-dev
+
+    - name: Configure CMake
+      shell: bash
+      run: cmake . -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DCMAKE_TOOLCHAIN_FILE="$GITHUB_WORKSPACE/glew-cmake/mingw.cmake"
+
+    - name: Build test
+      shell: bash
+      run: cmake --build .
+
+
   build_mac:
     runs-on: macos-latest
 
diff --git a/glew-cmake/mingw.cmake b/glew-cmake/mingw.cmake
new file mode 100644
index 0000000..d834751
--- /dev/null
+++ b/glew-cmake/mingw.cmake
@@ -0,0 +1,16 @@
+set(CMAKE_SYSTEM_NAME Windows)
+set(TOOLCHAIN_PREFIX x86_64-w64-mingw32)
+
+# cross compilers to use for C, C++ and Fortran
+set(CMAKE_C_COMPILER ${TOOLCHAIN_PREFIX}-gcc)
+set(CMAKE_CXX_COMPILER ${TOOLCHAIN_PREFIX}-g++)
+set(CMAKE_RC_COMPILER ${TOOLCHAIN_PREFIX}-windres)
+
+# target environment on the build host system
+set(CMAKE_FIND_ROOT_PATH /usr/${TOOLCHAIN_PREFIX})
+
+# modify default behavior of FIND_XXX() commands
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+