From a17d79e9c722a6735b6d2a8f152287404f27df32 Mon Sep 17 00:00:00 2001
From: Explorer09 <explorer09@gmail.com>
Date: Sat, 14 Oct 2017 00:36:54 +0800
Subject: scanner: Define _POSIX_C_SOURCE when needed in skeleton.

The function fileno() is defined by POSIX. When flex would otherwise not provide that feature macro, we define it.

Fixes #263
---
 src/flex.skl | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/flex.skl b/src/flex.skl
index 1191c50..332d3c0 100644
--- a/src/flex.skl
+++ b/src/flex.skl
@@ -218,6 +218,14 @@ m4_ifdef( [[M4_YY_TABLES_EXTERNAL]],
 
 /* begin standard C headers. */
 %if-c-only
+m4_ifdef( [[M4_YY_ALWAYS_INTERACTIVE]], ,
+[[m4_ifdef( [[M4_YY_NEVER_INTERACTIVE]], ,
+[[#ifndef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE 1 /* for fileno() */
+#ifndef _POSIX_SOURCE
+#define _POSIX_SOURCE 1
+#endif
+#endif]])]])
 #include <stdio.h>
 #include <string.h>
 #include <errno.h>
-- 
cgit v1.2.3