From:	rxmtemp AT mcdata DOT com (Raj Menon)
Subject:	Re: undefined reference to `errno' -Reply
26 Jan 1998 07:00:36 -0800 :
Message-ID:	<s4cc40c1.016.cygnus.gnu-win32@mcdata.com>
Mime-Version:	1.0
To:	gnu-win32 AT cygnus DOT com

>> When trying to compile netpbm-1mar94.p1 I get a bunch of messages
>> like
>> ../pbm/libpbm.a(libpbm1.o)(.text+0x4e1):libpbm1.c: undefined
>> reference
>>
>> to `errno'

> I had the same when I am trying to compile omniBroker 2.0.2

This shows up when people include a prototype for errno in
their code.  ie.:

extern int errno;

In the GNUWIN32 release, errno is a #define.  To fix this, do the
following:

#ifndef __CYGWIN32__
extern int errno;
#else
#include <errno.h>
#endif

or just remove the prototype and add the include if you don't care about
portability.

-raj


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