Add option to compile against shared SDL2

CMakeLists.txt

@@ -41,6 +41,7 @@ ENDIF()
 OPTION(CONFIG_BUILD_GLSLANG "Build glslangValidator from source instead of using the SDK" ${DEFAULT_BUILD_GLSLANG})
 OPTION(CONFIG_BUILD_IPO "Enable interprocedural optimizations" OFF)
 OPTION(CONFIG_BUILD_SHADER_DEBUG_INFO "Build shaders with debug info" OFF)
+OPTION(USE_SYSTEM_SDL2 "Prefer system SDL2 instead of the bundled one" OFF)
 OPTION(USE_SYSTEM_ZLIB "Prefer system ZLIB instead of the bundled one" OFF)
 OPTION(USE_SYSTEM_OPENAL "Prefer system OpenAL Soft instead of the bundled one" OFF)
 OPTION(USE_SYSTEM_CURL "Prefer system cURL instead of the bundled one" OFF)

VC/inc/SDL2/SDL.h

@@ -0,0 +1 @@
+#include <SDL.h>

VC/inc/SDL2/SDL_gamecontroller.h

@@ -0,0 +1 @@
+#include <SDL_gamecontroller.h>

VC/inc/SDL2/SDL_joystick.h

@@ -0,0 +1 @@
+#include <SDL_joystick.h>

VC/inc/SDL2/SDL_messagebox.h

@@ -0,0 +1 @@
+#include <SDL_messagebox.h>

VC/inc/SDL2/SDL_opengl.h

@@ -0,0 +1 @@
+#include <SDL_opengl.h>

VC/inc/SDL2/SDL_video.h

@@ -0,0 +1 @@
+#include <SDL_video.h>

VC/inc/SDL2/SDL_vulkan.h

@@ -0,0 +1 @@
+#include <SDL_vulkan.h>

extern/CMakeLists.txt

@@ -39,21 +39,25 @@ endif()
 
 # On a 32-bit target, only the server is built, and it doesn't need SDL
 if (IS_64_BIT)
-    option(SDL_SHARED "" OFF)
-    option(SDL_STATIC "" ON)
-    option(SDL_SHARED_ENABLED_BY_DEFAULT OFF)
-    option(SDL_TEST OFF)
-
-    if (CONFIG_LINUX_STEAM_RUNTIME_SUPPORT)
-        option(INPUT_TSLIB OFF)
-    endif()
-
-    add_subdirectory(SDL2)
-
-    set_target_properties(SDL2main PROPERTIES FOLDER extern)
-    set_target_properties(SDL2-static PROPERTIES FOLDER extern)
-    set_target_properties(uninstall PROPERTIES FOLDER extern)
-    set_target_properties(sdl_headers_copy PROPERTIES FOLDER extern)
+  if (USE_SYSTEM_SDL2)
+      find_package(SDL2 REQUIRED)
+  else()
+      option(SDL_SHARED "" OFF)
+      option(SDL_STATIC "" ON)
+      option(SDL_SHARED_ENABLED_BY_DEFAULT OFF)
+      option(SDL_TEST OFF)
+
+      if (CONFIG_LINUX_STEAM_RUNTIME_SUPPORT)
+          option(INPUT_TSLIB OFF)
+      endif()
+
+      add_subdirectory(SDL2)
+
+      set_target_properties(SDL2main PROPERTIES FOLDER extern)
+      set_target_properties(SDL2-static PROPERTIES FOLDER extern)
+      set_target_properties(uninstall PROPERTIES FOLDER extern)
+      set_target_properties(sdl_headers_copy PROPERTIES FOLDER extern)
+  endif()
 endif()
 
 #

src/CMakeLists.txt

@@ -564,12 +564,16 @@ ENDIF()
 
 TARGET_INCLUDE_DIRECTORIES(server PRIVATE ../inc)
 
-if(NOT USE_SYSTEM_ZLIB)
-    TARGET_INCLUDE_DIRECTORIES(server PRIVATE "${ZLIB_INCLUDE_DIRS}")
+if(TARGET client)
+    if (USE_SYSTEM_SDL2)
+        TARGET_LINK_LIBRARIES(client SDL2)
+    else()
+        TARGET_LINK_LIBRARIES(client SDL2main SDL2-static)
+    endif()
 endif()
 
-if(TARGET client)
-    TARGET_LINK_LIBRARIES(client SDL2main SDL2-static)
+if(NOT USE_SYSTEM_ZLIB)
+    TARGET_INCLUDE_DIRECTORIES(server PRIVATE "${ZLIB_INCLUDE_DIRS}")
 endif()
 
 if(USE_SYSTEM_ZLIB)

src/refresh/gl/qgl.h

@@ -20,7 +20,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #define QGL_H
 
 #if USE_SDL
- #include <SDL_opengl.h>
+ #include <SDL2/SDL_opengl.h>
 #else
 #ifdef _WIN32
  #define WIN32_LEAN_AND_MEAN 1

src/refresh/vkpt/main.c

@@ -42,8 +42,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "shader/vertex_buffer.h"
 
 #include <vulkan/vulkan.h>
-#include <SDL.h>
-#include <SDL_vulkan.h>
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_vulkan.h>
 
 #include <stdio.h>
 #include <stdlib.h>

src/refresh/vkpt/physical_sky.c

@@ -22,8 +22,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "../../client/client.h"
 #include <time.h>
 
-#include <SDL_joystick.h>
-#include <SDL_gamecontroller.h>
+#include <SDL2/SDL_joystick.h>
+#include <SDL2/SDL_gamecontroller.h>
 
 static VkImage          img_envmap = 0;
 static VkImageView      imv_envmap = 0;

src/refresh/vkpt/vkpt.h

@@ -21,8 +21,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #define  __VKPT_H__
 
 #include <vulkan/vulkan.h>
-#include <SDL.h>
-#include <SDL_vulkan.h>
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_vulkan.h>
 
 #if !defined(HAVE_M_PI)
 #define HAVE_M_PI

src/unix/sound/sdl.c

@@ -23,7 +23,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "shared/shared.h"
 #include "common/zone.h"
 #include "client/sound/dma.h"
-#include "SDL.h"
+#include "SDL2/SDL.h"
 
 static void Filler(void *userdata, Uint8 *stream, int len)
 {

src/unix/system.c

@@ -40,9 +40,9 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <errno.h>
 
 #if USE_CLIENT
-#include <SDL_video.h>
-#include <SDL_messagebox.h>
-#include <SDL.h>
+#include <SDL2/SDL_video.h>
+#include <SDL2/SDL_messagebox.h>
+#include <SDL2/SDL.h>
 
 extern SDL_Window *get_sdl_window(void);
 

src/unix/video/sdl.c

@@ -34,7 +34,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "refresh/refresh.h"
 #include "system/system.h"
 #include "../res/q2pro.xbm"
-#include <SDL.h>
+#include <SDL2/SDL.h>
 
 #ifdef _WINDOWS
 #include <ShellScalingAPI.h>