- Remove the -Y option for makedepend, so that the standard
directories are searched
- No longer pipe the multiple errors that the -Y option caused
into /dev/null -- we want to know about these failures.
- Fix up a few other misc makedepend failures.
variable (defaults to "make") and use that. Use the MKDEP and MKDEP_OPTIONS
more. Our shell isn't bash, so change the instances of ">& /dev/null" to a more
compatible "> /dev/null 2>&1".