Fwd: GDB/Python conflicts between HEAD and Fedora

Fwd: GDB/Python conflicts between HEAD and Fedora

[Kevin Pouget]

Hello,

It looks like I have a conflict in my system (Fedora 17) between the
package provided GDB and the version I build from the tree, am I the
only one ?

> ./gdb/gdb #from up-to-date git tree
> Python Exception <type 'exceptions.NameError'> name 'os' is not defined:
>
> warning: Could not load the Python gdb module from `/usr/share/gdb/python'.
>
> warning: Limited Python support is available from the _gdb module.
> [...license details ...]
> Couldn't load Python: name 'os' is not defined
> Traceback (most recent call last):
>  [local python file imported from .gdbinit]
>     import gdb
>   File "/usr/share/gdb/python/gdb/__init__.py", line 25, in <module>
>     'gdb.function': os.path.join(gdb.PYTHONDIR, 'gdb', 'function'),
> NameError: name 'os' is not defined

/usr/share/gdb/python/gdb/__init__.py is provided by Fedora, and 'os'
is indeed not imported

On the other hand, the GDB version provided by fedora package works as
expected, with my Python scripts taken into account.

So, do you have any clue why gdb tries to load these system files, and
certainly bugs because of a version mismatch ?

Just for information the two versions I use are :
GNU gdb (GDB) Fedora (7.4.50.20120120-52.fc17)
GNU gdb (GDB) 7.5.50.20121024-cvs



Cordially,

Kevin

Re: Fwd: GDB/Python conflicts between HEAD and Fedora

[Joel Brobecker]

> > warning: Could not load the Python gdb module from `/usr/share/gdb/python'.
> >
> > warning: Limited Python support is available from the _gdb module.

This is the important clue.  You need to install the GDB you built
in order for it to work properly. This was a recent change to the way
the gdb module is constructed, to make it more pythonic.

I am guessing that you configured GDB with the default --prefix,
and so it's finding the system ones from an older version of GDB.
If you're not going to install it in a system area, I'd configure
with a different prefix.

-- 
Joel

Re: Fwd: GDB/Python conflicts between HEAD and Fedora

[Kevin Pouget]

On Wed, Oct 24, 2012 at 5:17 PM, Joel Brobecker <brobecker@adacore.com> wrote:
>> > warning: Could not load the Python gdb module from `/usr/share/gdb/python'.
>> >
>> > warning: Limited Python support is available from the _gdb module.
>
> This is the important clue.  You need to install the GDB you built
> in order for it to work properly. This was a recent change to the way
> the gdb module is constructed, to make it more pythonic.
>
> I am guessing that you configured GDB with the default --prefix,
> and so it's finding the system ones from an older version of GDB.
> If you're not going to install it in a system area, I'd configure
> with a different prefix.

Hello,

thanks for your answer, `make install` did solve the problem :)

> I am guessing that you configured GDB with the default --prefix,
> and so it's finding the system ones from an older version of GDB.

just for the record, I think that you're not right on this point:
> cd $BUILD_DIR
> $SRC_DIR/configure --prefix=$INST_DIR
> make
> gdb/gdb # from $BUILD_DIR, this don't work yet
> make install
> gdb/gdb # from $BUILD_DIR, this work now
> $INST_DIR/bin/gdb # obviously works correctly


Thanks,

Kevin