RVM is maintained by community of volunteers, report issues to RVM issues tracker.
If you can help or wish to become one of the maintainers - just start helping. You can find more RVM related projects at RVM Github organization.
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Using MacPorts with RVM

RVM Uses MacPorts by default (if installed) read more about autolibs.

For old instructions before autolibs visit MacPorts before Autolibs

In case of problems with MacPorts you can try Homebrew:

rvm autolibs homebrew