[uml-user] patch: tools/moo/cow.c not picking up prototype for pread()

[Dave M. <da...@mi...>]

I just built uml_utilities-20040406 and got the following warning:

   cow.c: In function `file_reader':
   cow.c:233: warning: implicit declaration of function `pread'

The man page for pread(2) says:

   SYNOPSIS
      #define _XOPEN_SOURCE 500
      #include <unistd.h>
      ssize_t pread(int fd, void *buf, size_t count, off_t offset);

The following patch adds the required #define and indeed makes the warning go
away:

--- tools/moo/cow.c.orig	2003-09-03 12:35:07.000000000 -0400
+++ tools/moo/cow.c	2004-12-26 19:24:40.113998548 -0500
@@ -1,3 +1,4 @@
+#define _XOPEN_SOURCE 500 /* to pick up pread() in unistd.h */
 #include <stddef.h>
 #include <string.h>
 #include <errno.h>

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