@@ -749,39 +749,10 @@
 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")