settings.h (get): Mark const.

settings.h (get): Mark const.

	* include/parallel/settings.h (get): Mark const.
	* libsupc++/unwind-cxx.h (__cxa_call_terminate): Mark throw ().
	* libsupc++/eh_call.cc (__cxa_call_terminate): Mark throw ().
	* config/io/basic_file_stdio.cc (sys_open, is_open, fd, seekoff): Mark
	throw ().
	* config/io/basic_file_stdio.h (__basic_file, sys_open): Mark throw ().
	(is_open, fd): Mark pure and throw ().
	(seekoff): Mark throw ().

From-SVN: r147077