--- configure.orig	2020-03-02 06:56:54 +0000
+++ configure	2020-03-02 06:57:28 +0000
@@ -4221,7 +4221,7 @@
 $as_echo "#define _XOPEN_SOURCE /**/" >>confdefs.h
 
 
-$as_echo "#define _XOPEN_SOURCE_EXTENDED /**/" >>confdefs.h
+$as_echo "#define _XOPEN_SOURCE_EXTENDED 1" >>confdefs.h
 
 
 $as_echo "#define _ISOC99_SOURCE /**/" >>confdefs.h