Make CMake script more accurate to autoconf script

DBus, IBus and inotify is now able to be used outside Linux like in configure.
KMSDRM input is now working on FreeBSD with CMake compilation.

CMakeLists.txt

@@ -1215,9 +1215,7 @@ elseif(UNIX AND NOT APPLE AND NOT ANDROID AND NOT RISCOS)
   if(UNIX)
     file(GLOB CORE_UNIX_SOURCES ${SDL2_SOURCE_DIR}/src/core/unix/*.c)
     set(SOURCE_FILES ${SOURCE_FILES} ${CORE_UNIX_SOURCES})
-  endif()
 
-  if(LINUX)
     check_c_source_compiles("
         #include <linux/input.h>
         #ifndef EVIOCGNAME
@@ -1225,16 +1223,28 @@ elseif(UNIX AND NOT APPLE AND NOT ANDROID AND NOT RISCOS)
         #endif
         int main(int argc, char** argv) {}" HAVE_INPUT_EVENTS)
 
-    check_c_source_compiles("
+    if(LINUX)
-        #include <linux/kd.h>
+      check_c_source_compiles("
-        #include <linux/keyboard.h>
+          #include <linux/kd.h>
+          #include <linux/keyboard.h>
 
-        int main(int argc, char **argv)
+          int main(int argc, char **argv)
-        {
+          {
-            struct kbentry kbe;
+              struct kbentry kbe;
-            kbe.kb_table = KG_CTRL;
+              kbe.kb_table = KG_CTRL;
-            ioctl(0, KDGKBENT, &kbe);
+              ioctl(0, KDGKBENT, &kbe);
-        }" HAVE_INPUT_KD)
+          }" HAVE_INPUT_KD)
+    elseif(FREEBSD)
+      check_c_source_compiles("
+          #include <sys/kbio.h>
+          #include <sys/ioctl.h>
+
+          int main(int argc, char **argv)
+          {
+              accentmap_t accTable;
+              ioctl(0, KDENABIO, 1);
+          }" HAVE_INPUT_KBIO)
+    endif()
 
     if(HAVE_INPUT_EVENTS)
       set(SDL_INPUT_LINUXEV 1)
@@ -1251,10 +1261,15 @@ elseif(UNIX AND NOT APPLE AND NOT ANDROID AND NOT RISCOS)
       set(SDL_INPUT_LINUXKD 1)
     endif()
       
+    if(HAVE_INPUT_KBIO)
+      set(SDL_INPUT_FBSDKBIO 1)
+    endif()
+
     check_include_file("libudev.h" HAVE_LIBUDEV_H)
     check_include_file("sys/inotify.h" HAVE_SYS_INOTIFY_H)
     check_symbol_exists(inotify_init "sys/inotify.h" HAVE_INOTIFY_INIT)
     check_symbol_exists(inotify_init1 "sys/inotify.h" HAVE_INOTIFY_INIT1)
+      
     if(HAVE_SYS_INOTIFY_H AND HAVE_INOTIFY_INIT)
       set(HAVE_INOTIFY 1)
     endif()
@@ -1280,6 +1295,16 @@ elseif(UNIX AND NOT APPLE AND NOT ANDROID AND NOT RISCOS)
         set(SDL_USE_IME TRUE)
         add_definitions(-DSDL_USE_IME)   # !!! FIXME: why isn't this a definition and not in SDL_config.h.cmake?
       endif()
+        
+      if(FREEBSD AND NOT HAVE_INOTIFY)
+        pkg_search_module(INOTIFY libinotify)
+        if(INOTIFY_FOUND)
+          set(HAVE_INOTIFY 1)
+          include_directories(${INOTIFY_INCLUDE_DIRS})
+          list(APPEND EXTRA_LIBS ${INOTIFY_LIBRARIES})
+        endif()
+      endif()
+
       if(HAVE_LIBUNWIND_H)
         # We've already found the header, so REQUIRE the lib to be present
         pkg_search_module(UNWIND REQUIRED libunwind)
@@ -1313,6 +1338,10 @@ elseif(UNIX AND NOT APPLE AND NOT ANDROID AND NOT RISCOS)
       set(SOURCE_FILES ${SOURCE_FILES} "${SDL2_SOURCE_DIR}/src/core/linux/SDL_evdev_kbd.c")
     endif()
       
+    if(HAVE_INPUT_KBIO)
+      set(SOURCE_FILES ${SOURCE_FILES} "${SDL2_SOURCE_DIR}/src/core/freebsd/SDL_evdev_kbd_freebsd.c")
+    endif()
+
     # Always compiled for Linux, unconditionally:
     set(SOURCE_FILES ${SOURCE_FILES} "${SDL2_SOURCE_DIR}/src/core/linux/SDL_evdev_capabilities.c")
     set(SOURCE_FILES ${SOURCE_FILES} "${SDL2_SOURCE_DIR}/src/core/linux/SDL_threadprio.c")

include/SDL_config.h.cmake

@@ -302,6 +302,7 @@
 /* Enable various input drivers */
 #cmakedefine SDL_INPUT_LINUXEV @SDL_INPUT_LINUXEV@
 #cmakedefine SDL_INPUT_LINUXKD @SDL_INPUT_LINUXKD@
+#cmakedefine SDL_INPUT_FBSDKBIO @SDL_INPUT_FBSDKBIO@
 #cmakedefine SDL_JOYSTICK_ANDROID @SDL_JOYSTICK_ANDROID@
 #cmakedefine SDL_JOYSTICK_HAIKU @SDL_JOYSTICK_HAIKU@
 #cmakedefine SDL_JOYSTICK_DINPUT @SDL_JOYSTICK_DINPUT@