Re: Compilation for debugging

[Bill Allombert <Bill.Allombert@math.u-bordeaux1.fr>]

On Wed, Jun 20, 2007 at 03:52:22PM +0200, Xavier-Francois Roblot wrote:
> Hi,
> 
> I have a C-file called series.c that contains a certain number of
> functions that I use in GP files using install. Previously, when it did
> not work properly, I was able to compile it in debug mode and run it
> with dbg to find out what was going on. But when I try to do that now, I
> get the following error:  
> 
> gcc -c -g -o series.o -Wall -fPIC -I/home/roblot/pari/installed/include series.c -L/home/roblot/pari/Olinux-i686.dbg -L/usr/lib && gcc -o series.so -shared -Wall -fPIC -fomit-frame-pointer -Wl,-shared series.o -L/home/roblot/pari/Olinux-i686.dbg -lc -ldl -lm -L/usr/lib -lpari
> /usr/lib/gcc/i686-pc-linux-gnu/4.1.2/../../../../i686-pc-linux-gnu/bin/ld: avma: TLS reference in series.o mismatches non-TLS definition in /home/roblot/pari/Olinux-i686.dbg/libpari.so section .bss
> /home/roblot/pari/Olinux-i686.dbg/libpari.so: could not read symbols: Bad value
> collect2: ld returned 1 exit status
> make: *** [debug] Error 1
> 
> For information, I am using GCC v.4.1.2.
> 
> If anybody can help, I would be very grateful since it is quite
> difficult to debug a big program without using gdb :o)

I wonder whether you have used the option --enable-tls when configuring
PARI. This breaks the ABI, so you have to do it also for the debugging 
build.  You cannot use the TLS headers with a non-TLS libpari.

However, I would advise to install the debugging build somewhere
and using the headers and the library from the debugging build. 
This would avoid this kind of issues entirely.

Of course , you can use gp2c-dbg to compile your module.

Cheers,
Bill.