* c-common.c: Add support for __attribute__((nothrow)) to specify
	that a function cannot throw an exception (using TREE_NOTHROW).
	(handle_nothrow_attribute): New function to process this attribute.

	* doc/extend.texi: Document the new nothrow function attribute.

2002-05-27  Richard Henderson  <rth@redhat.com>

	* g++.dg/ext/attrib6.C: New test case.

From-SVN: r53940