substitute-path problem

[Daniel Jacobowitz]

I was hoping substitute-path would come in handy today, but I couldn't
get it to work.  Here is the problem:

  if (dirname != NULL)
    {
      /* If necessary, rewrite the compilation directory name according
         to the source path substitution rules specified by the user.  */

      char *rewritten_dirname = rewrite_source_path (dirname);

But:

Breakpoint 3, find_and_open_source (objfile=0x8aa2f0,
    filename=0x9892d0 "/full/path/to/file.c", dirname=0x0,
    fullname=0x9892c0) at /space/fsf/commit/src/gdb/source.c:952

I suspect compiling the file with a full path on the gcc command line
would reproduce this.  Do you think we're applying the substitution
rule in the wrong place?

-- 
Daniel Jacobowitz
CodeSourcery