Patch: Handle relative paths in .debug_line

[Bryce McKinlay]

There were some test suite regressions with the patch. I didn't get a 
chance to investigate them, yet.

Bryce

Andrew Cagney wrote:

> Did this get closed / committed?
>
>> Bryce McKinlay <mckinlay@redhat.com> writes:
>>
>>>> Jim Blandy wrote:
>>>
>>>
>>>>> >Almost --- dwarf2_start_subfile still passes comp_dir to concat
>>>>> >without checking whether it's NULL.
>>>>> >
>>>>
>>>
>>>> Fixed in the following patch. OK?
>>>
>>
>>
>> Looks better!
>>
>> You've done before-and-after runs of the test suite, right?  If there
>> are no regressions there, please feel free to commit.
>> Are there any tests currently in the test suite that catch this bug?
>>
>>
>