gentoo-overlay/dev-libs/libvformat/files/libvformat-1.13-has_unistd.patch

--- a/src/vf_reader.c
+++ b/src/vf_reader.c
@@ -87,8 +87,9 @@
 
 #include <stdio.h>
 #include <sys/stat.h>
+#include "config.h"
 
-#if defined(HAS_UNISTD_H)
+#if defined(HAVE_UNISTD_H)
 #include <unistd.h>
 #endif