llvm on OSX

[jonbaer]

OSX 10.11.6 + Homebrew 1.2 (+ using mapd-deps-osx.sh)

GroupByAndAggregate.h:34:10: fatal error:
'llvm/IR/Function.h' file not found
#include <llvm/IR/Function.h>

Any ideas for a fix? Looking at http://stackoverflow.com/questions/26246769/including-llvm-value-h-not-found do I need a different version of llvm (4.0)?

[asuhan]

Do you have llvm-config in your path? Version 4.0 should be fine.

[jonbaer]

Thanks, I am up + running, seems that brew --prefix got confused on an older copy while I was trying to figure it out (4.0 is fine) ...

brew --prefix llvm
/usr/local/Cellar/llvm/4.0.0_1
(previous)
brew --prefix llvm@3.7
/usr/local/opt/llvm@3.7

[bluealert]

I have removed llvm using brew remove llvm and the directory "llvm" is also deleted. but when I run brew --prefix llvm, the output is always: /usr/local/Cellar/llvm/5.0.0.

Does someone know the reason? How can I change the output of brew --prefix llvm ?

[jonbaer]

This seems to happen every LLVM release where they push the previous version down into /usr/local/opt for some reason. I think what should happen is the mapd-deps-osx.sh script should use llvm-config --prefix (vs. brew --prefix) - your output for --prefix is stuck at which version is linked.

You can try the following:
brew unlink llvm
brew install llvm
brew link --force llvm

[bluealert]

@jonbaer Thank you.

I run brew help --prefix, it's output is as follow:

brew --prefix:
    Display Homebrew's install path. *Default:* /usr/local

brew --prefix formula:
    Display the location in the cellar where formula is or would be installed.