Define _GNU_SOURCE.

diff --git a/libguile/eval.c b/libguile/eval.c
index b22f35e..6aae029 100644 (file)
--- a/libguile/eval.c
+++ b/libguile/eval.c
@@ -18,6 +18,8 @@
 
 \f
 
+#define _GNU_SOURCE
+
 /* This file is read twice in order to produce debugging versions of ceval and
  * scm_apply.  These functions, deval and scm_dapply, are produced when we
  * define the preprocessor macro DEVAL.  The file is divided into sections