Re: Can't find source files

[geneSmith <gene dot smith at sea dot siemens dot com>]

Dave Korn wrote, On 10/12/2004 10:10 AM:
> > -----Original Message-----
> > From: insight-owner On Behalf Of geneSmith
> > Sent: 12 October 2004 14:31
>
>
> > Dave Korn wrote, On 10/12/2004 5:04 AM:
> >
> >
> > > > -----Original Message-----
> > > > From: insight-owner On Behalf Of geneSmith
> > > > Sent: 11 October 2004 23:26
>
>
> > > > If you set directory to:
> > > >
> > > > /cygdrive/d
> > > >
> > > > and your $cdir is /home/gene/source
> > > >
> > > > where d is a samba drive mapped to /
> > > >
> > > > Is there a reason why insight/gdb would not find the files at
> > > >
> > > > /cygdrive/d/home/gene/source ?
>
>
> > >  ? I can't see anything in the gdb docs that suggests it 
> >
> > would concatenate $cdir to $cwd.  Where do you get that from ?
>
>
> > What I am implying is that gdb concatentates the paths specified by 
> > "directory" with the path to the source file contained in the object 
> > file as described in Debugging with GDB section 7.4, 
> > Specifying source directories.
>
>
>   That's the same bit I read.  Where do you see the word 'concatenate' in
> that?
>
>
> > (Maybe I dont' completely know the meaining of $cdir?)
>
>
>   I think you're making a false assumption about how path searching works.
> Look:
>
> "   When you start GDB, its source path includes only `cdir' and `cwd',
> in that order.  To add other directories, use the `directory' command. "
>
>   So, in your case, the source path will include "/home/gene/source" ($cdir,
> the compilation dir) and "/cygdrive/d", your current directry ($cwd).  Now
> read the bit about how the path search operates:
>
> "  GDB has a list of directories to search for
> source files; this is called the "source path".  Each time GDB wants a
> source file, it tries all the directories in the list, in the order
> they are present in the list, until it finds a file with the desired
> name.  "
>
>   So, first gdb looks for your source file in "/home/gene/source", then it
> looks in "/cygdrive/d".  Neither of those are the path to your source file,
> so it doesn't find it.  At no time does it start concatenating the different
> directories in the source path.  It won't look in
> /cygdrive/d/home/gene/source.  It won't look in /home/gene/source/cygdrive/d
> either, which is what you're suggesting it should do, but is more obviously
> wrong....!
>
>   This is all just the same as how $PATH works in your shell.  If you have
>
> PATH=/bin:/usr/bin
>
> you wouldn't expect it to find executables in /bin/usr/bin, would you?
>
>     cheers, 
>       DaveK

Dave,

The 9th Edition of "Debugging with GDB" on page 61 also states:

"For example, suppose an executable references the file 
‘/usr/src/foo-1.0/lib/foo.c’,
and our source path is ‘/mnt/cross’. The file is first looked up 
literally; if this fails,‘/mnt/cross/usr/src/foo-1.0/lib/foo.c’ is 
tried; if this fails, ‘/mnt/cross/foo.c’ is
opened; if this fails, an error message is printed."

I think this is right after where you quoted. I have seen this work in 
some cases but not for the one I mention (or possibly it's still a user 
error).

It does not explicitly say "concatentate" but that seem like what the 
middle example is, /mnt/cross/usr/src/foo-1.0/lib/foo.c .
-gene

--
Lit up like Levy's