Checking obsolete macro AC_GNU_SOURCE as of autoconf-2.62

diff --git a/configure.ac b/configure.ac
index f70a4a77f929c56c8f8ec1f6a90d897081edd5ed..8cede20a42948044d06af97d96022356f1accf60 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -4,7 +4,8 @@ dnl Minimum Autoconf version required.
 AC_PREREQ(2.59)
 
 AC_INIT([fping],[5.1])
-AC_GNU_SOURCE
+
+m4_ifdef([AC_AUTOCONF_VERSION],[AC_USE_SYSTEM_EXTENSIONS], [AC_GNU_SOURCE])
 
 dnl --disable-ipv4
 AC_ARG_ENABLE([ipv4],