[nostalgia] Add scaffolding for ImGui

deps/imgui/CMakeLists.txt

@@ -0,0 +1,40 @@
+add_library(
+	imgui-glfw
+		src/imgui_impl_glfw.cpp
+		src/imgui_impl_opengl3.cpp
+)
+
+find_package(glfw3 REQUIRED)
+find_package(imgui REQUIRED)
+
+if(APPLE)
+	target_compile_definitions(
+		imgui-glfw PRIVATE
+			IMGUI_IMPL_OPENGL_LOADER_CUSTOM="OpenGL/gl3.h"
+	)
+endif()
+
+target_link_libraries(
+	imgui-glfw PUBLIC
+		${OPENGL_gl_LIBRARY}
+		glfw::glfw
+		imgui::imgui
+)
+
+if(NOT MSVC)
+	target_compile_options(
+		imgui-glfw PRIVATE
+			-Wno-all
+			-Wno-extra
+			-Wno-old-style-cast
+			-Wno-deprecated-declarations
+	)
+endif()
+
+install(
+	TARGETS
+		imgui-glfw
+	DESTINATION
+		LIBRARY DESTINATION lib/nostalgia
+		ARCHIVE DESTINATION lib/nostalgia
+)