ObjFW  Diff

		;;
esac
AS_IF([test x"$have_processes" = x"yes"], [
	AC_SUBST(OFPROCESS_M, "OFProcess.m")
	AC_DEFINE(OF_HAVE_PROCESSES, 1, [Whether we have processes])
])

AC_DEFUN([CHECK_BUILTIN_RETURN_ADDRESS], [
	AC_MSG_CHECKING(for working __builtin_return_address)
	AC_TRY_LINK([
		#if defined(__ppc__) || defined(__PPC__)
		/* __builtin_return_address() is known to work correctly */
		#else
		# error
		#endif
	], [
		__builtin_return_address(1);
	], [
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_BUILTIN_RETURN_ADDRESS, 1,
			[Whether we have __builtin_return_address])
	], [
		AC_MSG_RESULT(no)
	])
])
AC_CHECK_HEADER(execinfo.h, [
	AC_DEFINE(HAVE_EXECINFO_H, 1, [Whether we have execinfo.h])
	AC_CHECK_FUNC(backtrace, [
		AC_DEFINE(HAVE_BACKTRACE, 1, [Whether we have backtrace()])
	], [
		CHECK_BUILTIN_RETURN_ADDRESS
	])
], [
	CHECK_BUILTIN_RETURN_ADDRESS
])

AS_IF([test x"$objc_runtime" = x"Apple runtime"], [
	AC_CHECK_HEADER(Foundation/NSObject.h, [
		AC_SUBST(FOUNDATION_COMPAT_M, "foundation-compat.m")
		AC_SUBST(BRIDGE, "bridge")

		AS_IF([test x"$enable_shared" != x"no"], [
			AC_SUBST(OBJFW_BRIDGE_SHARED_LIB,