From:	"Johan Venter" <jventer AT writeme DOT com>
Newsgroups:	comp.os.msdos.djgpp
References:	<1 DOT 5 DOT 4 DOT 16 DOT 19990801161857 DOT 1a2f7b02 AT erie DOT net>
Subject:	Re: Questions
Lines:	47
X-Newsreader:	Microsoft Outlook Express 4.72.3110.1
X-MimeOLE:	Produced By Microsoft MimeOLE V4.72.3110.3
Message-ID:	<tofp3.17474$yD2.37662@newsfeeds.bigpond.com>
Date:	Mon, 2 Aug 1999 11:13:24 +1000
NNTP-Posting-Host:	139.134.162.74
X-Trace:	newsfeeds.bigpond.com 933593753 139.134.162.74 (Mon, 02 Aug 1999 21:35:53 EST)
NNTP-Posting-Date:	Mon, 02 Aug 1999 21:35:53 EST
Organization:	Telstra BigPond Internet Services (http://www.bigpond.com)
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Rich wrote in message <1 DOT 5 DOT 4 DOT 16 DOT 19990801161857 DOT 1a2f7b02 AT erie DOT net>...
>  1) does the DJGPP _always_ make a 32-bit exe, or _only_ when certain
>compiler directives are in place?

It always makes 32-bit protected mode executables.

>  2) actual DPMI functions _only_ become available when specific
>"dmpi-activating" instructions are used ?

The DPMI services are always available (and required) when useing DJGPP-created programs.

>  3) I wish to learn more about how DJGPP seems to interface well with
>16-bit DOS drivers/TSR's, considering its 32-bit.

Well, there are a number of ways:
    1. The DOS extender helps with this.
    2. Programs can be written to use special features of DJGPP for accessing 16-bit
things (especially interrupts).

>  4) How on earth can I reduce the size of a simple djgpp program?!?!
>    printf("Hello DJGPP!\n"); consumed 103K for the EXE !! and contained
>    tons of debug/stub info!

Compile with the -s (that's a SMALL s) command line option, that will strip all your debug
info (making it impossible to debug the program properly).
Also, look for an EXE file compressor named UPX.

>  I notice some people are designing "Windows 95" applications which
>claim to support Long-Filenames, "pixview" being one of them.
>  When I run this program in Win95 I still see ~ in the filenames...

DJGPP is natively compatible with Windows 9x long file names. They don't work on Windows
NT though.

>I am MOST INTERESTED in books which provide information on the library
>functions (djgpp version of the C/C++ runtime library).

Why not read the source? That must be the best way to learn how they work.

--
Johan Venter
ICQ 3643877
Visit The TPU DJGPP Interest Group:
http://surf.to/djgppig

- Raw text -