From c1091f32fba9c254a074a50f5759c33d9667b989 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Fri, 20 Mar 2015 10:35:42 -0400
Subject: [PATCH] CMake project files no longer force you to link against
 Wayland or Mir libs.

---
 CMakeLists.txt             |  3 +++
 cmake/sdlchecks.cmake      | 53 ++++++++++++++++++++++++++++++++++----
 include/SDL_config.h.cmake | 13 ++++------
 3 files changed, 56 insertions(+), 13 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 23c270fe3..bb69a8410 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -274,7 +274,10 @@ set_option(CLOCK_GETTIME       "Use clock_gettime() instead of gettimeofday()" O
 set_option(INPUT_TSLIB         "Use the Touchscreen library for input" ${UNIX_SYS})
 set_option(VIDEO_X11           "Use X11 video driver" ${UNIX_SYS})
 set_option(VIDEO_WAYLAND       "Use Wayland video driver" ${UNIX_SYS})
+dep_option(WAYLAND_SHARED      "Dynamically load Wayland support" ON "VIDEO_WAYLAND" OFF)
+dep_option(VIDEO_WAYLAND_QT_TOUCH  "QtWayland server support for Wayland video driver" ON "VIDEO_WAYLAND" OFF)
 set_option(VIDEO_MIR           "Use Mir video driver" ${UNIX_SYS})
+dep_option(MIR_SHARED          "Dynamically load Mir support" ON "VIDEO_MIR" OFF)
 set_option(VIDEO_RPI           "Use Raspberry Pi video driver" ${UNIX_SYS})
 dep_option(X11_SHARED          "Dynamically load X11 support" ON "VIDEO_X11" OFF)
 set(SDL_X11_OPTIONS Xcursor Xinerama XInput Xrandr Xscrnsaver XShape Xvm)
diff --git a/cmake/sdlchecks.cmake b/cmake/sdlchecks.cmake
index e8d746f96..e568dea89 100644
--- a/cmake/sdlchecks.cmake
+++ b/cmake/sdlchecks.cmake
@@ -505,8 +505,13 @@ macro(CheckX11)
   endif()
 endmacro()
 
+# Requires:
+# - EGL
+# - PkgCheckModules
+# Optional:
+# - MIR_SHARED opt
+# - HAVE_DLOPEN opt
 macro(CheckMir)
-# !!! FIXME: hook up dynamic loading here.
     if(VIDEO_MIR)
         find_library(MIR_LIB mirclient mircommon egl)
         pkg_check_modules(MIR_TOOLKIT mirclient mircommon)
@@ -522,15 +527,31 @@ macro(CheckMir)
             set(SDL_VIDEO_DRIVER_MIR 1)
 
             list(APPEND EXTRA_CFLAGS ${MIR_TOOLKIT_CFLAGS} ${EGL_CLFAGS} ${XKB_CLFLAGS})
-            list(APPEND EXTRA_LDFLAGS ${MIR_TOOLKIT_LDFLAGS} ${EGL_LDLAGS} ${XKB_LDLAGS})
-        endif (MIR_LIB AND MIR_TOOLKIT_FOUND AND EGL_FOUND AND XKB_FOUND)
+
+            if(MIR_SHARED)
+                if(NOT HAVE_DLOPEN)
+                    message_warn("You must have SDL_LoadObject() support for dynamic Mir loading")
+                else()
+                    FindLibraryAndSONAME(mirclient)
+                    FindLibraryAndSONAME(xkbcommon)
+                    set(SDL_VIDEO_DRIVER_MIR_DYNAMIC "\"${MIRCLIENT_LIB_SONAME}\"")
+                    set(SDL_VIDEO_DRIVER_MIR_DYNAMIC_XKBCOMMON "\"${XKBCOMMON_LIB_SONAME}\"")
+                    set(HAVE_MIR_SHARED TRUE)
+                endif()
+            else()
+                set(EXTRA_LIBS ${MIR_TOOLKIT_LIBRARIES} ${EXTRA_LIBS})
+            endif()
+        endif()
     endif()
 endmacro()
 
 # Requires:
 # - EGL
+# - PkgCheckModules
+# Optional:
+# - WAYLAND_SHARED opt
+# - HAVE_DLOPEN opt
 macro(CheckWayland)
-# !!! FIXME: hook up dynamic loading here.
   if(VIDEO_WAYLAND)
     pkg_check_modules(WAYLAND wayland-client wayland-cursor wayland-egl egl xkbcommon)
     if(WAYLAND_FOUND)
@@ -540,12 +561,34 @@ macro(CheckWayland)
       include_directories(
           ${WAYLAND_INCLUDE_DIRS}
       )
-      set(EXTRA_LIBS ${WAYLAND_LIBRARIES} ${EXTRA_LIBS})
       set(HAVE_VIDEO_WAYLAND TRUE)
       set(HAVE_SDL_VIDEO TRUE)
 
       file(GLOB WAYLAND_SOURCES ${SDL2_SOURCE_DIR}/src/video/wayland/*.c)
       set(SOURCE_FILES ${SOURCE_FILES} ${WAYLAND_SOURCES})
+
+      if(VIDEO_WAYLAND_QT_TOUCH)
+          set(SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH 1)
+      endif()
+
+      if(WAYLAND_SHARED)
+        if(NOT HAVE_DLOPEN)
+          message_warn("You must have SDL_LoadObject() support for dynamic Wayland loading")
+        else()
+          FindLibraryAndSONAME(wayland-client)
+          FindLibraryAndSONAME(wayland-egl)
+          FindLibraryAndSONAME(wayland-cursor)
+          FindLibraryAndSONAME(xkbcommon)
+          set(SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC "\"${WAYLAND_CLIENT_LIB_SONAME}\"")
+          set(SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_EGL "\"${WAYLAND_EGL_LIB_SONAME}\"")
+          set(SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_CURSOR "\"${WAYLAND_CURSOR_LIB_SONAME}\"")
+          set(SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_XKBCOMMON "\"${XKBCOMMON_LIB_SONAME}\"")
+          set(HAVE_WAYLAND_SHARED TRUE)
+        endif()
+      else()
+        set(EXTRA_LIBS ${WAYLAND_LIBRARIES} ${EXTRA_LIBS})
+      endif()
+
       set(SDL_VIDEO_DRIVER_WAYLAND 1)
     endif()
   endif()
diff --git a/include/SDL_config.h.cmake b/include/SDL_config.h.cmake
index b12ea524b..db245aa49 100644
--- a/include/SDL_config.h.cmake
+++ b/include/SDL_config.h.cmake
@@ -269,14 +269,11 @@
 #cmakedefine SDL_VIDEO_DRIVER_VIVANTE @SDL_VIDEO_DRIVER_VIVANTE@
 #cmakedefine SDL_VIDEO_DRIVER_VIVANTE_VDK @SDL_VIDEO_DRIVER_VIVANTE_VDK@
 
-#if 0
-/* !!! FIXME: in configure script version, missing here: */
-#undef SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH
-#undef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC
-#undef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_EGL
-#undef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_CURSOR
-#undef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_XKBCOMMON
-#endif
+#cmakedefine SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH @SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH@
+#cmakedefine SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC @SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC@
+#cmakedefine SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_EGL @SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_EGL@
+#cmakedefine SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_CURSOR @SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_CURSOR@
+#cmakedefine SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_XKBCOMMON @SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_XKBCOMMON@
 
 #cmakedefine SDL_VIDEO_DRIVER_MIR @SDL_VIDEO_DRIVER_MIR@
 #cmakedefine SDL_VIDEO_DRIVER_MIR_DYNAMIC @SDL_VIDEO_DRIVER_MIR_DYNAMIC@