Comment 4 for bug 923631

This seems to be the discussion thread re Chrosyophe Fergeau's patch and fix:

    http://mandriva.598463.n5.nabble.com/Cooker-gcc-4-5-td2640835.html

Note the very last comment in the thread:

    Well, there are more problematic cases (most notably builddir being shorter
    than debugdir) that are not handled and would be very difficult to fix.

To try to illustrate what that means in plain english, here are the "traditional"
paths in RPM:

    builddir = /usr/src/redhat
    debugdir = /usr/src/debug

So -debuginfo is possible only because
     sizeof ("redhat") >= sizeof("debug")

i.e. paths are being rewritten in a fixed size ELF section. The final paths must
be less than or equal to the initial paths (or producing -debuginfo isn't possible).

This was the state since forever: might be fixed in latest debugedit.c *shrug*.