config.gcc (ia64*-*-hpux*): Add ia64-c.o to c_target and cxx_target.

config.gcc (ia64*-*-hpux*): Add ia64-c.o to c_target and cxx_target.

	* config.gcc (ia64*-*-hpux*): Add ia64-c.o to c_target and
	cxx_target.
	* config/ia64/hpux.h (REGISTER_TARGET_PRAGMAS): Register pragma
	handling routine for builtin pragma.
	* config/ia64/ia64-protos.h (ia64_hpux_handle_builtin_pragma):
	Registered pragma handling routine.
	* ia64-c.c (ia64_hpux_handle_builtin_pragma): Ditto.
	(ia64_hpux_add_pragma_builtin) New subroutine used by above.
	If builtin pragma seen for math routine and C89 conformance is
	requested use different math function in order to set errno.
	* t-ia64 (ia64-c.o): Add new rule for new file.

From-SVN: r56767