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I would like to install gcc with homebrew on a MacBook Pro (OS X 10.10.3) and ran into this:
mach:gcc mh$ brew install gcc
Warning: gcc-4.9.2_1 already installed, it's just not linked
mach:gcc mh$ brew link gcc
Linking /usr/local/Cellar/gcc/4.9.2_1...
Error: Could not symlink lib/gcc/4.9
/usr/local/lib/gcc is not writable.
What can I do? (adjusting the permissions of /usr/local/lib/gcc?
Marius Hofert
Posted 2015-05-10T19:18:05.593
Reputation: 184
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The error:
/usr/local/lib/gcc is not writable.
means that your /usr/local/lib folder is not writable for brew.
Therefore you should fix the wrong permissions first by:
sudo chown -R $USER /usr/local/lib /usr/local/include /usr/local/bin /usr/local/Cellar
Then if this still doesn't work, run:
brew doctor
to check your system for potential other problems which you may have.
Similar issue: Brew doctor says: “Warning: /usr/local/include isn't writable.” at SO
kenorb
Posted 2015-05-10T19:18:05.593
Reputation: 16 795
Thanks for helping. I think it should be
-R(uppercase). Before changing permissions, I checked (in the Terminal) and they were already set correctly, but executingchownindeed helped. Seems strange. – Marius Hofert – 2015-05-10T20:11:54.913@MariusHofert I've fixed typo, thanks. Sometimes when you run
brewwithsudo, it breaks the permissions, so you've to re-run thechownagain then. – kenorb – 2015-05-10T20:13:52.190