fix oudated CMake compile settings, add OpenGL dependency for Linux

.gitignore

@@ -5,3 +5,4 @@ obj
 *.o
 melon_grc.c
 melon_grc.h
+cmake-build

src/CMakeLists.txt

@@ -22,8 +22,13 @@ add_library(core STATIC
 	SPU.cpp
 	Wifi.cpp
 	WifiAP.cpp
+	# opengl backend stuff
+	GPU3D_OpenGL.cpp
+	OpenGLSupport.cpp
 )
 
 if (WIN32)
 	target_link_libraries(core ole32 comctl32 ws2_32)
+else()
+	target_link_libraries(core OpenGL)
 endif()

src/OpenGLSupport.cpp

@@ -18,6 +18,8 @@
 
 #include "OpenGLSupport.h"
 
+#include <cstring>
+
 
 DO_PROCLIST(DECLPROC);
 

src/libui_sdl/CMakeLists.txt

@@ -10,6 +10,8 @@ SET(SOURCES_LIBUI
 	DlgEmuSettings.cpp
 	DlgInputConfig.cpp
 	DlgWifiSettings.cpp
+	# opengl backend stuff
+	DlgVideoSettings.cpp
 )
 
 option(BUILD_SHARED_LIBS "Whether to build libui as a shared library or a static library" ON)