I've been working on some homebrew formulas for using gcc 4.9 with the msp430. I've got some preliminary builds working (though I haven't had the chance to upload code to a board yet). They're available via my tap '8bitsofme/homebrew-msp430'.
I've been running into this issue where the 'make install' step fails, but if I repeat 'make install' everything seems to work out fine. I'm new to cross compiling. If anyone can guide me I'd love to fix this issue and try to get these formulas published in mainline homebrew.