1 files changed, 1 insertions, 1 deletions
diff --git a/configure b/configure
index d2beb5fce2..c674a55bf1 100755
--- a/configure
+++ b/configure
@@ -872,7 +872,7 @@ else # if test -z "$_target"
   fi
 fi
 
-extra_cflags="-I. $extra_cflags"
+extra_cflags="-I. -D_GNU_SOURCE $extra_cflags"
 _timer=timer-linux.c
 _getch=getch2.c