From: fjh AT cs DOT mu DOT OZ DOT AU (Fergus Henderson)
Subject: Re: Problems with Mercury
18 Sep 1998 13:22:53 -0700
Message-ID: <19980918191502.37149.cygnus.gnu-win32@mundook.cs.mu.OZ.AU>
References: <19980910115354 DOT 21759 DOT rocketmail AT send103 DOT yahoomail DOT com>
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To: gnu-win32 AT cygnus DOT com
Cc: john_r_velman AT mail DOT hac DOT com

---john_r_velman AT mail DOT hac DOT com wrote:
>
> Has anyone successfully compiled and installed Mercury lately?

Earnie Boyd <earnie_boyd AT yahoo DOT com> replied:
> STATUS_ACCESS_VIOLATION relates to SIGSEGV, meaning that you've
> stepped outside the memory bounds of the program.
> 
> 1) If the package has it's own memory allocation routines remove them
> and use the mmalloc.a library supplied by the cygwin product.
> 
> 2) If the compilations gave you warnings concerning pointers and
> non-pointers, consider them errors and fix them.
> 
> 3) If you pointer who has a value of NULL or zero is used as a
> reference to a memory location you will get this error.

I debugged a STATUS_ACCESS_VIOLATION problem that I encountered when
trying Mercury on cygwin32 version b19.1.  As it happens, the problem
was due to the version of gcc distributed with b19.1 generating
incorrect code, rather than any of the alternatives 1-3 above.

Stipe Tolj <tolj AT uni-duesseldorf DOT de> also replied:
> I had some problems too in geting the Apache HTTP Server running. Since it
> is fork()ing childs, it seems to be crashing with a STATUS_ACCESS_VIOLATION
> after trying to init a child process. I assume that this could be the
> problem at your task.

A STATUS_ACCESS_VIOLATION is a quite common diagnostic which can have
a range of different causes, and in this particular case I don't think
the problem was related to the use of fork().

As I said in my previous mail, the problems have been solved in
the lastest snapshot of the Mercury distribution and in the versions
of egcs/binutils available at Mumit Khan's site.

-- 
Fergus Henderson <fjh AT cs DOT mu DOT oz DOT au>  |  "I have always known that the pursuit
WWW: <http://www.cs.mu.oz.au/~fjh>  |  of excellence is a lethal habit"
PGP: finger fjh AT 128 DOT 250 DOT 37 DOT 3        |     -- the last words of T. S. Garp.
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