ansidecl.h (HAVE_GCC_VERSION): New macro.

ansidecl.h (HAVE_GCC_VERSION): New macro.

include:
	* ansidecl.h (HAVE_GCC_VERSION): New macro.  Use instead of
	explicitly testing __GNUC__ and __GNUC_MINOR__.

	(ATTRIBUTE_PRINTF): Use `__format__', not `format'.

gcc:
	* cppinit.c: Use HAVE_GCC_VERSION instead of explicitly testing
	__GNUC__ and __GNUC_MINOR__.

	* gansidecl.h: Likewise.

	* rtl.c: Likewise.

	* rtl.h: Likewise.

	* toplev.h: Likewise.

	* tree.c: Likewise.

	* tree.h: Likewise.

	* varray.c: Likewise.

	* varray.h: Likewise.

cp:
	* cp-tree.h: Use HAVE_GCC_VERSION instead of explicitly testing
	__GNUC__ and __GNUC_MINOR__.

f:
	* proj.h: Use HAVE_GCC_VERSION instead of explicitly testing
	__GNUC__ and __GNUC_MINOR__.  Don't define BUILT_WITH_270.
	Define macro UNUSED in terms of ATTRIBUTE_UNUSED.

From-SVN: r29890