Add AC_GNU_SOURCE.

diff --git a/configure.in b/configure.in
index b87b37ddbe10de2ea186623eee2449f87a53bf26..227f5bac0286fcde8174d02450ba80e3a660e046 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -11,6 +11,7 @@ mutt_cv_version=`cat $srcdir/VERSION`
 
 
 AM_INIT_AUTOMAKE(mutt, $mutt_cv_version)
+AC_GNU_SOURCE
 
 ifdef([AC_LIBOBJ], , [define([AC_LIBOBJ], [LIB[]OBJS="$LIBOBJS $1.o"])])