* defaults.h (TARGET_ALLOWS_PROFILING_WITHOUT_FRAME_POINTER): New

	macro.
	* tm.texi (TARGET_ALLOWS_PROFILING_WITHOUT_FRAME_POINTER):
	Document it.
	* toplev.c (main): If the target does not allow profiling without
	a frame pointer, issue an error message.
	* config/i386/linux.h (TARGET_ALLOWS_PROFILING_WITHOUT_FRAME_POINTER):
	Define it to false.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@42312 138bc75d-0d04-0410-961f-82ee72b054a4