Based on the patch by Chun Tian, and tests by Robert Goldman, I committed preliminary support for RMCL in ASDF 2.012.3. Things that you may want to debug further:
1- In lisp-version-string, the (subseq s 8) may or may not be warranted anymore. Is there still a big DIGITOOL starting the (lisp-implementation-version) ?
2- In directory-pathname-p there looks like something funky is happening with :unspecific. If some good soul can identify the issue and provide a fix or workaround, that would be great.
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