Explictly maerk buf.c as requiring posix APIs (truncate)

diff --git a/libedit/buf.c b/libedit/buf.c
index e36d375f69aab121b5e4711600bfc333b2783319..92c5440a307c7b962a7f5e17d13d3b66a5e1acbf 100644 (file)
--- a/libedit/buf.c
+++ b/libedit/buf.c
@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 200809L
 #include <stdc.h>
 #include <utf.h>
 #include <edit.h>