From: "John M. Aldrich" <fighteer AT cs DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Silly Elementary Question
Date: Wed, 24 Dec 1997 20:51:36 -0500
Organization: Two pounds of chaos and a pinch of salt.
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Message-ID: <34A1BC28.6306@cs.com>
References: <01bd10b8$85d81640$893b37a6 AT jim>
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jsmith2 wrote:
> 
> Howdy!  I just downloaded and installed gcc and rhide, and I'm getting an
> error that I can't figure out when I try to compile a simple C program --
> surely due to my own ignorance:
> 
> Error: stdio.h: No such file or directory (ENOENT)

This error means that DJGPP couldn't find the file.  ENOENT is the
internal name of the POSIX error code that means, "file not found."  :-)

The overwhelmingly likely reason for this error is that you simply did
not set up your environment correctly as instructed in the file
'v2/readme.1st'.  Please make sure that you have:

a) Properly unzipped the DJGPP files, preserving the directory
structure.
b) Set your DJGPP environment variable correctly in 'autoexec.bat'. 
Since you seem (by your example) to have installed it in d:\djgpp, the
correct setting is thus:

SET DJGPP=D:\DJGPP\DJGPP.ENV

Incorrect settings might be:

SET DJGPP = D:\DJGPP\DJGPP.ENV  (no spaces!!)
SET DGJPP=D:\DJGPP\DJGPP.ENV    (misspelled)
SET DJGPP=D:\DJGPP              (the file, not the directory)

c) Not changed or edited 'djgpp.env' in any way.

If all else fails, please post a system report as described in chapter
6.12 of the DJGPP Frequently Asked Questions list (v2/faq210b.zip or
online at http://www.delorie.com/djgpp/v2faq/).  You might also want to
try out my DJVERIFY diagnostic utility, which is in prerelease testing
at the moment.  Please note that the latest version is WIP; it's not
official.  Email me for more information.

> I tried to include stdio.h two ways; like this:
> 
>             #include <stdio.h>
> 
> and like this:
> 
>           include "d:\djgpp\include\stdio.h"

One last note.  In C/C++ string and character literals, the '\'
(backslash) character is an escape code.  When you write a string that
needs literal backslashes, you have to double them up ("\\").  A better
choice is to use forward slashes, which are understood by both DOS and
DJGPP.  The following will both work:

#include "d:\\djgpp\\include\\stdio.h"
#include "d:/djgpp/include/stdio.h"

However, explicitly specifying the path to a standard header should
NEVER be necessary.  Don't do it!

hth

-- 
---------------------------------------------------------------------
|      John M. Aldrich       | "To be 'matter of fact' about the    |
|       aka Fighteer I       | world is to blunder into fantasy--   |
|   mailto:fighteer AT cs DOT com   | and dull fantasy at that, as the real|
| http://www.cs.com/fighteer | world is strange and wonderful." -LL |
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