diff -ur 01/bootstrap-prefix.sh 02/bootstrap-prefix.sh
--- 01/bootstrap-prefix.sh	2020-10-24 18:59:42.666509906 +0300
+++ 02/bootstrap-prefix.sh	2020-10-24 19:01:46.479776856 +0300
@@ -222,8 +222,8 @@
 			local ccvers="$( (unset CHOST; gcc --version 2>/dev/null) )"
 			local mycc=
 			case "${ccvers}" in
-				*"Apple LLVM version "*)
-					vers=${ccvers#*Apple LLVM version }
+				*"Apple "*" version "*)
+					vers=${ccvers#*Apple * version }
 					vers=${vers% (clang-*}
 					# let's assume that >=llvm-3.6 is able to compile
 					# libcxx, so select the matching Apple versions, see