don't write file history in backgound mode (running ctest would overwrite all...

don't write file history in backgound mode (running ctest would overwrite all my recent-files.txt), and add an error about mingw/quicktime being unsupported.

CMakeLists.txt

@@ -188,6 +188,9 @@ if(APPLE)
 	option(WITH_LIBS10.5  "Use 10.5 libs (needed for 64bit builds)" OFF)
 endif()
 
+#-----------------------------------------------------------------------------
+# Check for conflicting/unsupported configurations
+
 if(NOT WITH_GAMEENGINE AND WITH_PLAYER)
 	message(FATAL_ERROR "WITH_PLAYER requires WITH_GAMEENGINE")
 endif()
@@ -209,6 +212,12 @@ if(WITH_PYTHON_MODULE AND WITH_PYTHON_INSTALL)
 	message(FATAL_ERROR "WITH_PYTHON_MODULE requires WITH_PYTHON_INSTALL to be OFF")
 endif()
 
+if(WITH_CODEC_QUICKTIME AND MINGW)
+	message(FATAL_ERROR "MINGW requires WITH_CODEC_QUICKTIME to be OFF "
+						"because it is currently unsupported, remove this "
+						"line if youre a developer who wants to add support.")
+endif()
+
 # may as well build python module without a UI
 if(WITH_PYTHON_MODULE)
 	set(WITH_HEADLESS ON)

source/blender/windowmanager/intern/wm_files.c

@@ -747,7 +747,10 @@ int WM_write_file(bContext *C, const char *target, int fileflags, ReportList *re
 		if(fileflags & G_FILE_AUTOPLAY) G.fileflags |= G_FILE_AUTOPLAY;
 		else G.fileflags &= ~G_FILE_AUTOPLAY;
 
+		/* prevent background mode scripts from clobbering history */
+		if(!G.background) {
 			write_history();
+		}
 
 		/* run this function after because the file cant be written before the blend is */
 		if (ibuf_thumb) {