CMAKE: Allow building without SFML

CMakeLists.txt

@@ -41,7 +41,7 @@ FIND_PACKAGE ( ZLIB REQUIRED )
 FIND_PACKAGE ( PNG REQUIRED )
 FIND_PACKAGE ( OpenGL REQUIRED )
 FIND_PACKAGE ( SDL REQUIRED )
-FIND_PACKAGE ( SFML REQUIRED )
+FIND_PACKAGE ( SFML )
 
 # Disable looking for GTK if not going to build the GTK frontend
 # so that pkg-config is not required
@@ -50,6 +50,7 @@ IF(NOT NO_GTK)
 
     # These dependencies require pkg-config to be found
     PKG_CHECK_MODULES ( GTKMM gtkmm-2.4 )
+    PKG_CHECK_MODULES ( GDKMM gdkmm-2.4 )
     PKG_CHECK_MODULES ( GLIBMM glibmm-2.4 )
     PKG_CHECK_MODULES ( GIOMM giomm-2.4 )
     PKG_CHECK_MODULES ( GTKGLMM gtkglextmm-x11-1.2 )
@@ -91,6 +92,12 @@ ADD_DEFINITIONS (-DHAVE_NETINET_IN_H -DHAVE_ARPA_INET_H -DHAVE_ZLIB_H -DFINAL_VE
 
 ADD_DEFINITIONS (-DVERSION='"${VERSION}"' -DPKGDATADIR='"${PKGDATADIR}"' -DPACKAGE='')
 
+# Linking is disabled if SFML has not been found
+IF( NOT SFML_FOUND )
+	ADD_DEFINITIONS (-DNO_LINK)
+        MESSAGE(STATUS "SFML was not found, link support is disabled")
+ENDIF( NOT SFML_FOUND )
+
 # The debugger is enabled by default
 # The SDL port can't be built without debugging support
 IF( NO_DEBUGGER )
@@ -284,6 +291,7 @@ IF( CAN_BUILD_GVBAM )
         ${GLIBMM_INCLUDE_DIRS}
         ${GIOMM_INCLUDE_DIRS}
         ${GTKMM_INCLUDE_DIRS}
+        ${GDKMM_INCLUDE_DIRS}
         ${GTKGLMM_INCLUDE_DIRS}
     )
 

src/gba/GBALink.cpp

@@ -1,5 +1,12 @@
 // This file was written by denopqrihg
 
+// Joybus
+bool gba_joybus_enabled = false;
+
+// If disabled, gba core won't call any (non-joybus) link functions
+bool gba_link_enabled = false;
+
+#ifndef NO_LINK
 #ifdef _WIN32
 #include "../win32/stdafx.h"
 #include "../win32/VBA.h"
@@ -18,14 +25,9 @@
 
 int linktime = 0;
 
-// Joybus
-bool gba_joybus_enabled = false;
 GBASockClient* dol = NULL;
 sf::IPAddress joybusHostAddr = sf::IPAddress::LocalHost;
 
-// If disabled, gba core won't call any (non-joybus) link functions
-bool gba_link_enabled = false;
-
 #ifdef _MSC_VER
 // Hodgepodge
 u8 tspeed = 3;
@@ -1219,3 +1221,7 @@ void LinkSSend(u16 value){
 }
 
 #endif // _MSC_VER
+
+#else // NO_LINK
+void JoyBusUpdate(int ticks) {}
+#endif // NO_LINK

src/gba/GBALink.h

@@ -1,6 +1,8 @@
 #pragma once
 
+#ifndef NO_LINK
 #include <SFML/Network.hpp>
+#endif
 
 #define LINK_PARENTLOST 0x80
 #define UNSUPPORTED -1
@@ -116,7 +118,9 @@ typedef struct {
 #endif
 
 extern bool gba_joybus_enabled;
+#ifndef NO_LINK
 extern sf::IPAddress joybusHostAddr;
+#endif
 extern void JoyBusConnect();
 extern void JoyBusShutdown();
 extern void JoyBusUpdate(int ticks);

src/gba/GBASockClient.cpp

@@ -1,3 +1,5 @@
+#ifndef NO_LINK
+
 #include "GBASockClient.h"
 
 // Currently only for Joybus communications
@@ -36,3 +38,5 @@ char GBASockClient::ReceiveCmd(char* data_in)
 
 	return data_in[0];
 }
+
+#endif // NO_LINK