[yocto] GDB problems

[Gary Thomas]

On 2013-04-08 06:47, Paul Eggleton wrote:
> On Monday 08 April 2013 06:30:02 Gary Thomas wrote:
>> On 2013-04-08 05:03, Gary Thomas wrote:
>>> I'm trying to run GDB to debug code on my target.  Whenever I start
>>>
>>> it up, I get this warning:
>>>     warning: Unable to find libthread_db matching inferior's thread
>>>     library, thread debugging will not be available.>
>>> and indeed, no thread debug commands will work.
>>>
>>> I've found that the library /usr/lib/libthread_db.so is not being
>>> installed in the rootfs.  However, just adding this library isn't
>>> enough.  The file /lib/libpthread-2.60.so has been stripped on the
>>> target and this also breaks GDB.  Installing a non-stripped version
>>> of this library lets GDB do thread debugging.
>>>
>>> Both of these libraries come from the eglibc package.  How can I
>>>
>>> adjust that recipe to:
>>>     * Install libthread_db.so
>>>     * Avoid stripping libpthread-2.16.so
>
> Does installing eglibc-dbg help with this? (Assuming you don't have this
> installed already.)

Yes, although it's named 'libc6-dbg'

>
>>> It looks like the libthread_db.so file(s) should be installed via
>>> the 'eglibc-thread-db' package, but I can't find this package anywhere
>>> on my system.
>>
>> It's not clear to me why, but the files labelled as 'eglibc-thread-db' in
>> the eglibc recipe end up in the 'libthread-db1' package, so that mystery
>> is solved.
>
> That is debian library package renaming (debian.bbclass).

Ah, black magic...

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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