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Date:	Fri, 29 May 2015 08:58:02 +0300
From:	"Eli Zaretskii (eliz AT gnu DOT org)" <djgpp AT delorie DOT com>
Subject:	Re: ANNOUNCE: DJGPP 2.05 beta 1
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> Date: Thu, 28 May 2015 15:00:35 -0700
> From: "Louis Santillan (lpsantil AT gmail DOT com)" <djgpp AT delorie DOT com>
> 
> In porting, I noticed that using `cc -std=c99` confuses the djgpp
> headers such that the main bodies of the headers get nullified for
> io.h, fcntl.h, and unistd.h.  This is because `-std=c99` implies
> `__STRICT_ANSI__` which is guarded against in those headers and
> probably others.  The simple work around is to instead use
> `-std=gnu99` which does not imply `__STRICT_ANSI__`  and brings in the
> needed function prototypes (isatty(), setmode(), a couple others).

Don't use -std=c99, unless you are building a program that doesn't use
any features not in the ANSI C99 standard.

I think you want -std=gnu99 instead.  That option doesn't disable
non-ANSI features, but does assume C99 features supported.

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