From a04d3909494faf336eb1c51de35085d41f5d678d Mon Sep 17 00:00:00 2001
From: Georgi Gerganov <ggerganov@gmail.com>
Date: Sun, 3 Jan 2021 11:52:34 -0800
Subject: [PATCH] add Windows build instructions with MSYS2 + MinGW

---
 README.md                                 | 13 ++++-
 examples/third-party/CMakeLists.txt       |  3 +-
 examples/third-party/ggsock               |  2 +-
 examples/third-party/imgui/CMakeLists.txt | 65 +++++++++++++++++------
 4 files changed, 64 insertions(+), 19 deletions(-)

diff --git a/README.md b/README.md
index 8944379..5639d50 100644
--- a/README.md
+++ b/README.md
@@ -71,7 +71,18 @@ Other projects using **ggwave** or one of its prototypes:
 
 ## Building
 
-### Linux and Mac:
+### Dependencies for SDL-based examples
+
+    [Ubuntu]
+    $ sudo apt install libsdl2-dev
+    
+    [Mac OS with brew]
+    $ brew install sdl2
+    
+    [MSYS2]
+    $ pacman -S git cmake make mingw-w64-x86_64-dlfcn mingw-w64-x86_64-gcc mingw-w64-x86_64-SDL2
+
+### Linux, Mac, Windows (MSYS2):
 
 ```bash
 # build
diff --git a/examples/third-party/CMakeLists.txt b/examples/third-party/CMakeLists.txt
index 6fb6209..d13b18d 100644
--- a/examples/third-party/CMakeLists.txt
+++ b/examples/third-party/CMakeLists.txt
@@ -1,5 +1,6 @@
 if (NOT EMSCRIPTEN)
 endif()
-add_subdirectory(imtui)
+
+#add_subdirectory(imtui)
 add_subdirectory(imgui)
 add_subdirectory(ggsock)
diff --git a/examples/third-party/ggsock b/examples/third-party/ggsock
index 4f6b1c3..9934b3d 160000
--- a/examples/third-party/ggsock
+++ b/examples/third-party/ggsock
@@ -1 +1 @@
-Subproject commit 4f6b1c3b16c70743c1e880e37eabc48992c305f2
+Subproject commit 9934b3d94961ddcf48633deb0076bb41901b17e6
diff --git a/examples/third-party/imgui/CMakeLists.txt b/examples/third-party/imgui/CMakeLists.txt
index 8885597..150760f 100644
--- a/examples/third-party/imgui/CMakeLists.txt
+++ b/examples/third-party/imgui/CMakeLists.txt
@@ -32,7 +32,55 @@ target_link_libraries(imgui PRIVATE
     )
 
 if (GGWAVE_SUPPORT_SDL2)
-    if (NOT EMSCRIPTEN)
+    if (MINGW)
+	find_package(PkgConfig REQUIRED)
+	pkg_search_module(SDL2 REQUIRED sdl2)
+
+        add_library(imgui-sdl2 ${GGWAVE_LIBRARY_TYPE}
+            imgui/examples/libs/gl3w/GL/gl3w.c
+            imgui-extra/imgui_impl.cpp
+            imgui-extra/imgui_impl_sdl.cpp
+            imgui-extra/imgui_impl_opengl3.cpp
+            )
+
+        target_include_directories(imgui-sdl2 PUBLIC
+            imgui/examples/libs/gl3w
+            ${SDL2_INCLUDE_DIRS}
+            )
+
+        target_include_directories(imgui-sdl2 PRIVATE
+            imgui
+            imgui-extra
+            )
+
+        target_link_libraries(imgui-sdl2 PUBLIC
+            imgui
+	    opengl32
+            ${SDL2_LIBRARIES}
+	    stdc++
+            )
+
+        target_link_libraries(imgui-sdl2 PRIVATE
+            ${CMAKE_DL_LIBS}
+            ${CMAKE_THREAD_LIBS_INIT}
+            ${ADDITIONAL_LIBRARIES}
+            )
+    elseif (EMSCRIPTEN)
+        add_library(imgui-sdl2 ${GGWAVE_LIBRARY_TYPE}
+            imgui-extra/imgui_impl.cpp
+            imgui-extra/imgui_impl_sdl.cpp
+            imgui-extra/imgui_impl_opengl3.cpp
+            )
+
+        target_include_directories(imgui-sdl2 PRIVATE
+            imgui
+            imgui-extra
+            )
+
+        target_link_libraries(imgui-sdl2 PUBLIC
+            imgui
+            )
+    else()
         find_package(OpenGL REQUIRED)
 
         add_library(imgui-sdl2 ${GGWAVE_LIBRARY_TYPE}
@@ -63,20 +111,5 @@ if (GGWAVE_SUPPORT_SDL2)
             ${CMAKE_THREAD_LIBS_INIT}
             ${ADDITIONAL_LIBRARIES}
             )
-    else()
-        add_library(imgui-sdl2 ${GGWAVE_LIBRARY_TYPE}
-            imgui-extra/imgui_impl.cpp
-            imgui-extra/imgui_impl_sdl.cpp
-            imgui-extra/imgui_impl_opengl3.cpp
-            )
-
-        target_include_directories(imgui-sdl2 PRIVATE
-            imgui
-            imgui-extra
-            )
-
-        target_link_libraries(imgui-sdl2 PUBLIC
-            imgui
-            )
     endif()
 endif()