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forwarded message from O'Neal, Tom

From: Andreas Zeller
Subject: forwarded message from O'Neal, Tom
Date: Mon, 12 Feb 2001 06:24:29 +0100 (CET)

--- Begin Message --- Subject: RE: Threads Date: Thu, 8 Feb 2001 19:12:34 -0500
Hi, Andreas

I'm trying to use GDB under DDD on an IBM platform (AIX, OS level
When I try to select my executable with the "file" command, I get "illegal
instruction" and a core dump. My executable was built using the native IBM
compiler (not gcc). Any suggestions? It is OK to use a compiler other than
gcc, right?

I'm trying GDB, rather than DBX, because DDD seems to provide better
inherent support for GDB, especially with threads and signals. Is that true?

I am using version 4.18 of GDB, configured as "powerpc-ibm-aix4.3.3.0."

My application is written in C (not C++). It is a VERY BIG application with
thousands of symbols. The IBM linker warns that it is having to build an
overflow area and "extra instructions" to handle all my symbols. Maybe
that's a clue to the "illegal instruction" message I get when I try to
access my executable.

Thanks for your help.


-----Original Message-----
From: Andreas Zeller [mailto:address@hidden
Sent: Thursday, July 20, 2000 1:21 AM
To: O'Neal, Tom; O'Neal, Tom
Cc: ddd
Subject: Re: Threads


"O'Neal, Tom" <address@hidden> writes:

> Hi, Gnu
> Is it really true that DDD doesn't support threads in DBX? We really need
> thread support for our development work.

DDD lets you enter DBX command at will, so you can use arbitrary DBX
commands related to threads.

Whether the GUI supports threads depends on your particular DBX
flavour; DDD 3.2.91 (the latest beta) has some support for Sun DBX

If you give me a summary of the thread commands supported by your DBX,
including a sample output, I'll be happy to include support in the DDD
`Threads' dialog.

> If DDD doesn't support threads when using DBX, is GDB a viable alternative
> to DBX? Can GDB work with IBM and SUN's own compilers?

AFAIK, GDB works with IBM and Sun compilers; expect a few problems
regarding scoping and C++ demangling, though.


Andreas Zeller     Universitaet Passau

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Subject: Re: Threads
From: Andreas Zeller <address@hidden>
Date: 20 Jul 2000 09:56:44 +0200
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Andreas Zeller     Universitaet Passau

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