* gcc.c (DEFAULT_SWITCH_CURTAILS_COMPILATION,
	SWITCH_CURTAILS_COMPILATION): Remove.
	* doc/tm.texi.in (SWITCH_CURTAILS_COMPILATION): Remove
	documentation.
	* doc/tm.texi: Regenerate.
	* system.h (SWITCH_CURTAILS_COMPILATION): Poison.

From-SVN: r165855