GDB cannot find line info

[Christophe LYON <christophe.lyon@st.com>]

Hello,

I have found a bug in our compiler (Open64 for ST200), which I have 
fixed to make it correctly output the directory table related to 
debug_line info.
But now, I have many regressions in the GDB testsuite (6.8), the first 
one being in break.exp: now the command "break break.c:103" returns 'No 
line 103 in file "break.c"'

I have dumped the dwarf debug_line info with 'dwarfdump -l' and 'readelf 
-wl', but could not find anything suspect:
- with dwarfdump, the only difference is in the directory path
- with readelf, the directory tables contain one more entry (absolute 
path to gdb.base) and the file table has dir numbers updated 
accordingly. (obviously, the length and offset of the corresponding 
sections are different)

Is there any GDB internal command I could use to understand the problem?

Thanks,

Christophe.