Regarding RMCL and logical pathnames, please test 2.016.2. I introduce some non-trivial pathname changes.
On RMCL, ASDF sees strings as "/posix/namestrings/" in its configuration. if you want OS9-style pathnames, they are #p"that:a:way:". You can thus both trivially share your configuration with other implementations, and just as trivially use MCL-specific paths.
For logical pathnames, I implemented my "harder way" plan from previous email:
make extra effort when using DIRECTORY against logical pathnames to always reconstitute LPNs from the PPNs given by directory, and drop the reconstituted results if they don't resolve to the same thing.
In other words, if I compute (directory #p"FOO:CL;BAR;"), and find a file #p"/home/baz/cl/bar/quux.asd", the file will be kept only if (make-pathname :name "quux" :type "asd" :defaults #p"FOO:CL;BAR;") has the previous as its truename. And similarly when walking directories. I believe this restriction is not a problem in practice, and will keep things somewhat sane.
And no, it's probably still not a good idea to try mix logical pathnames and mixed-case physical pathnames, as the result is highly non-portable.
Also removed *system-cache* and getuid, which were bad ideas that never worked (and if anyone is using either, he'll thank me for making him stop).
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