ObjFW  Diff

			#if defined(__amd64__) || defined(__x86_64__)
			# ifdef __ELF__
			yes
			# endif
			#endif
		], [
			AC_SUBST(LOOKUP_S, lookup-amd64-elf.S)
			AC_SUBST(FORWARDING_S, forwarding-amd64-elf.S)
			AC_DEFINE(OF_ASM_LOOKUP, 1,
				[Whether to use assembly for lookup])
			AC_DEFINE(OF_HAVE_FORWARDING_TARGET_FOR_SELECTOR, 1,
				[Whether we have forwardingTargetForSelector:])
		], [
			AC_EGREP_CPP(yes, [
				#if defined(__i386__) && defined(__ELF__)
				yes
				#endif
			], [
				AC_SUBST(LOOKUP_S, lookup-x86-elf.S)
				AC_DEFINE(OF_ASM_LOOKUP, 1,
					[Whether to use assembly for lookup])
				AC_DEFINE(OF_HAVE_FORWARDING_TARGET_FOR_SELECTOR, 1,
					[Whether we have forwardingTargetForSelector:])
			])
		])

		AC_EGREP_CPP(yes, [
			#if defined(__amd64__) || defined(__x86_64__)
			# ifdef __MACH__
			yes

			[Whether we use the Apple ObjC runtime])

		AC_CHECK_LIB(objc, objc_msgSend, [
			LIBS="-lobjc $LIBS"
		], [
			AC_MSG_ERROR([libobjc not found!])
		])

		dnl We should check for PPC64, as this currently does not
		dnl support forwardingTargetForSelector: as there is no test
		dnl machine available.
		AC_SUBST(FORWARDING_S, "apple-forwarding.S")
		AC_DEFINE(OF_HAVE_FORWARDING_TARGET_FOR_SELECTOR, 1,
			[Whether we have forwardingTargetForSelector:])
		;;
esac

AC_CHECK_FUNC(objc_constructInstance, [], [
	AC_SUBST(INSTANCE_M, "instance.m")
])