Date: Mon, 11 Nov 2002 07:45:38 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
X-Sender: eliz AT is
To: Charles Wilkins <chas AT pcscs DOT com>
cc: djgpp AT delorie DOT com
Subject: Re: i686-pc-msdosdjgpp-g++ problems (long)
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On Sun, 10 Nov 2002, Charles Wilkins wrote:

> >Ok. Now do "br 0x0001f47f" or "br *0x0001f47f" (I forget the exact
> >syntax) and "run". Now you should stop just before the crash. Examine
> >the registers and figure out what's wrong. Do "disass 0x0001f47f" or
> >"disass *0x0001f47f" to see the exact machine instruction that
> >crashes.
> 
> C:\Archives\RIP2\DJGPP\bin>gdb wel-g.exe
> GNU gdb 5.2.1
> Copyright 2002 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and
> you are
> welcome to change it and/or distribute copies of it under certain
> conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for
> details.
> This GDB was configured as "i386-pc-msdosdjgpp"...
> (gdb) run
> Starting program: c:/Archives/RIP2/DJGPP/bin/wel-g.exe
> 
> Program received signal SIGSEGV, Segmentation fault.

No, no, no, this is wrong.  You should set the breakpoint _before_ 
running the program, not after.  That is, type "br *0x0001e1df" right 
after GDB prints its startup blurb, and _then_ type "run".

> Could this problem be resulting from the libstdc++.a archive library
> having a name that defies DOS naming conventions?

No, but is it possible that libstdc++.a you linked against was compiled 
for native GNU/Linux compiler, not as a cross-compiled library for DJGPP?