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Date: Mon, 06 May 2002 22:12:36 -0400
To: "Frank Cottrell" <frank AT businesscraft DOT com>, cygwin AT cygwin DOT com
From: "Larry Hall (RFK Partners, Inc)" <lhall AT rfk DOT com>
Subject: Re: Missing library routines
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At 09:39 PM 5/6/2002, Frank Cottrell wrote:
>Hi,
>
>I have been using Cygwin for about 5 months now. I am trying to get a free
>package (Dibol to C converter) working and further developed - I have so far
>overcome lots of environment change requirements and I am nearly there with
>the original package, but I have reached a difficult one (well, difficult
>for me at least.)
>
>The d2c Run Time Library needs some accurate maths and calls the routines
>llround and llabs. My problem is that none of the Cygwin libraries that I
>can find have those sorts of long long maths routines.
>
>I researched the problem to the point where I found the routines are part of
>the GNU C library glibc, so I downloaded glibc-2.2.5 only to find that it
>has not been ported to Cygwin and I could not find any evidence to suggest
>such a port is either in progress, or even contemplated.
>
>So, being somewhat new to this wonderful world of Unix/Linux/Cygwin culture
>my questions are:
>
>If Cygwin is seriously trying to provide a great Unix style environment
>within the Windows environment, then why is this major library functionality
>not ported yet - I think I must be missing something big an bad about this
>thought.
>
>Is there an alternate library available for Cygwin that provides such maths
>routines
>
>Being a lad not easily deterred, I tried configuring the glibc library
>with --enable-hacker-mode set and it still fell over, complaining about
>cygwin - and so I then read some documentation where I gather that the
>library needs some really fundamental hooks into the operating system
>environment and then I see that there are sysdep directories to be set up
>and populated and then I wonder how much grief there is down this road, so I
>decided to ask this list and see what you experts say about all of this.



Yep, this has all been discussed before.  The short answer is that Cygwin
has its own C library called newlib.  There are no plans to replace it
with glib due to licensing restrictions at least.  Getting glib to build with 
Cygwin is probably a Herculean task if it's even that easy.  Feel free to try 
it though. ;-)  It's probably easier to just add what you need to newlib
though.





Larry Hall                              lhall AT rfk DOT com
RFK Partners, Inc.                      http://www.rfk.com
838 Washington Street                   (508) 893-9779 - RFK Office
Holliston, MA 01746                     (508) 893-9889 - FAX


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