[patch libiberty include]: Add additional helper functions for directory-separator searching

[Pedro Alves]

On Tuesday 08 March 2011 18:37:49, Eli Zaretskii wrote:
> > > Another is in find_file_and_directory() in dwarf2read.c file.
> > 
> > Workaround for Irix.  Certainly that '/' should not depend
> > on the host gdb is running on.
> 
> It actually should use IS_ABSOLUTE_FILE_NAME, if any portability
> enhancement is needed here.

The point of the code, according to its comment,
is to workaround an issue with the debug info output by the
native Irix compiler.  You wouldn't want a cross-Irix,
Windows-hosted gdb looking for '\' or a drive prefix in order
to decide whether to apply the workaround.  In other words,
we _always_ want to check for literal '/' here:

  if (*comp_dir != NULL)
    {
      /* Irix 6.2 native cc prepends <machine>.: to the compilation
	 directory, get rid of it.  */
      char *cp = strchr (*comp_dir, ':');

      if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/')
	*comp_dir = cp + 1;
    }

-- 
Pedro Alves