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Date: Fri, 08 Nov 2002 03:50:35 -0300
To: cygwin AT cygwin DOT com
From: Ariel Manzur <listas AT anime DOT com DOT ar>
Subject: gdb ignoring dll debugging symbols?
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Hi..

I'm trying to debug a program that uses a couple of DLLs, wich are also 
part of the program. All the .o files on the dlls are compiled with -g, and 
are built with a command I got from the 'cygin users guide' (I'm also using 
the '-mno-cyginw' flag):

gcc -shared -o lib${module}.dll \
     -Wl,--out-implib=lib${module}.dll.a \
     -Wl,--export-all-symbols \
     -Wl,--enable-auto-import \
     -Wl,--whole-archive ${object_files} \
     -Wl,--no-whole-archive ${dependency_libs}

I got a .dll with all the debugging symbols, and a .dll.a with none. So I 
run gdb (I tried ver. 5.0 and 5.2.1) with a program linked with that 
library, and it doesn't load any of the debugging symbols from the dll, and 
when it crashes, I get several frames with '???????????????' and a memory 
address on the stack. I tried using the 'dll-symbols' command (with the dll 
file), in that case I can put breakpoints on files from the dll, but they 
are all ignored, and I get that same stack when the program crashes.
I also tried loading gdb with the dll as the 'main file' (like "gdb -nw 
libfoo.dll"), and then using the 'exec-file' command to load the main exe 
file, with no luck.

Is this a know problem? or do I not know how to use gdb? :) Any ideas?

Thanks..

Ariel


Ariel.
http://Anime.com.ar
snm


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