From:	Damian Yerrick <Bullcr_pd_yerrick AT hotmail DOT comRemoveBullcr_p>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: newbie: difference btw. Djgpp and Cygnus
Organization:	Pin Eight Software http://pineight.8m.com/
Message-ID:	<movstssr21noaoe2ehjn1klpgbh0n53uau@4ax.com>
References:	<8rlm1u$o9k$1 AT infosun2 DOT rus DOT uni-stuttgart DOT de>
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NNTP-Posting-Date:	Sat, 07 Oct 2000 01:48:23 GMT
Distribution:	world
Date:	Sat, 07 Oct 2000 01:48:23 GMT
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

On Sat, 7 Oct 2000 01:09:09 +0200, "L. Lu"
<inf28484 AT studserv DOT uni-stuttgart DOT de> wrote:

>I've just started to use DJGPP. But I am confused with the
>2 gcc's on my computer. One is of course the gcc from DJGPP,
>the other is from Cygnus. Are they both the DOS port of GCC?

Cygwin is a Win32-hosted, Win32-targeted GCC port.

>Do they share the same syntax

Yes.

>and same library?

No.  DJGPP's libc is licensed under GNU Lesser GPL, a license
compatible with proprietary software.
  http://www.gnu.org/copyleft/lesser.html
Cygwin's libc is licensed under GNU GPL, a viral copyleft license.
All apps that use Cygwin's libc (as opposed to msvcrt.dll) must be
distributed as Free Software(TM).
  http://www.gnu.org/copyleft/gpl.html

>Besides gcc there are also the tools like gas, gdb etc. in Cygnus.
>I don't know which one I should use to compile, to debug ......
>I'm confused.

Use DJGPP for
  o DPMI (32-bit DOS) apps.

Use Cygwin for
  o Win32 apps licensed under the GNU GPL.

Use a .bat file for
  o switching between DJGPP and Cygwin, or DJGPP and MinGW, etc.

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