linuxbsd: move all X11 stuff in its own directory

This allows implementing `DisplayServer`s like Wayland without making a
mess in the source tree.

platform/linuxbsd/SCsub

@@ -14,15 +14,7 @@ common_linuxbsd = [
 ]
 
 if env["x11"]:
-    common_linuxbsd += [
-        "gl_manager_x11.cpp",
-        "detect_prime_x11.cpp",
-        "display_server_x11.cpp",
-        "key_mapping_x11.cpp",
-    ]
-
-    if env["vulkan"]:
-        common_linuxbsd.append("vulkan_context_x11.cpp")
+    common_linuxbsd += SConscript("x11/SCsub")
 
 if env["speechd"]:
     common_linuxbsd.append(["speechd-so_wrap.c", "tts_linux.cpp"])

platform/linuxbsd/os_linuxbsd.cpp

@@ -40,7 +40,7 @@
 #endif
 
 #ifdef X11_ENABLED
-#include "display_server_x11.h"
+#include "x11/display_server_x11.h"
 #endif
 
 #ifdef HAVE_MNTENT

platform/linuxbsd/x11/SCsub

@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+
+Import("env")
+
+source_files = [
+    "display_server_x11.cpp",
+    "key_mapping_x11.cpp",
+]
+
+if env["vulkan"]:
+    source_files.append("vulkan_context_x11.cpp")
+
+if env["opengl3"]:
+    source_files.append(["gl_manager_x11.cpp", "detect_prime_x11.cpp"])
+
+objects = []
+
+for source_file in source_files:
+    objects.append(env.Object(source_file))
+
+Return("objects")

platform/linuxbsd/x11/display_server_x11.h

@@ -47,7 +47,7 @@
 #include "servers/rendering_server.h"
 
 #if defined(SPEECHD_ENABLED)
-#include "tts_linux.h"
+#include "../tts_linux.h"
 #endif
 
 #if defined(GLES3_ENABLED)
@@ -56,12 +56,12 @@
 
 #if defined(VULKAN_ENABLED)
 #include "drivers/vulkan/rendering_device_vulkan.h"
-#include "platform/linuxbsd/vulkan_context_x11.h"
+#include "vulkan_context_x11.h"
 #endif
 
 #if defined(DBUS_ENABLED)
-#include "freedesktop_portal_desktop.h"
-#include "freedesktop_screensaver.h"
+#include "../freedesktop_portal_desktop.h"
+#include "../freedesktop_screensaver.h"
 #endif
 
 #include <X11/Xcursor/Xcursor.h>