--- /dev/null
+--- a/configure.ac
++++ b/configure.ac
+@@ -25,13 +25,13 @@ dnl This keeps being the first instructi
+ dnl Change the 2nd argument if the version increases
+ dnl 1st + 2nd argument is used for distribution package name
+ AC_INIT(lcr, 1.6, andreas@eversberg.eu)
+-AC_PREREQ(2.59)
++AC_PREREQ(2.60)
+ AC_CONFIG_SRCDIR([main.c])
+ AM_CONFIG_HEADER(config.h)
+
+ # fix warnings from autoconf + automake
+-AC_GNU_SOURCE
+-# AC_USE_SYSTEM_EXTENSIONS
++#AC_GNU_SOURCE
++AC_USE_SYSTEM_EXTENSIONS
+ AM_INIT_AUTOMAKE(lcr,1.6)
+
+