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Message-ID:	<36E29663.7B7D74A8@cityweb.de>
Date:	Sun, 07 Mar 1999 16:08:19 +0100
From:	Corinna Vinschen <corinna DOT vinschen AT cityweb DOT de>
X-Mailer:	Mozilla 4.04 [en] (WinNT; I)
MIME-Version:	1.0
To:	John Zheng <Yien AT usa DOT net>, cygwin AT sourceware DOT cygnus DOT com
Subject:	Re: compiling file 3.26
References:	<Pine DOT GSU DOT 4 DOT 05 DOT 9903070052510 DOT 15188-100000 AT viking DOT cris DOT com>

John Zheng wrote:
> 
> Corinna,
> 
> I downloaded file-3.26.tar.gz from ftp.astron.com, and tried to compile it.
> 
> Near the end of compilation, I get the error:
> [...]
> /a/cygnus/file-3.26/file.c:202: undefined reference to `errno'
> [...]
> Do you know what the problem is?  errno appears to be defined as:
> 
> extern int errno;               /* Some unixes don't define this..      */

The `extern' declaration of errno must be substituted with

#include <errno.h>

Cygwin defines errno not as a global variable, but as a
#define to a function call. This is needed, because it
wouldn't be reentrant else.

Regards,
Corinna



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