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Update to correct brew gcc command (#1931)

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The previous command did not work for me. This one did.
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Rajiv Abraham 2017-11-29 14:20:49 -05:00 committed by Tianqi Chen
parent 790da458e7
commit 77715d5c62
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python-package/build_trouble_shooting.md
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@ -55,7 +55,7 @@ Mac OS X (specific)
Most of the troubles and solutions are the same with that in the Linux platform. Mac has the following specific problems.
**Trouble 0**: I successfully installed `xgboost` using github installation/using `pip install xgboost`. But it runs very slow with only single thread, what is going on?
**Solution 0**: `clang LLVM` compiler on Mac OS X from Xcode doesn't support OpenMP multi-thread. An alternative choice is installing `homebrew` <http://brew.sh/> and `brew install g++-5` which provides multi-thread OpenMP support.
**Solution 0**: `clang LLVM` compiler on Mac OS X from Xcode doesn't support OpenMP multi-thread. An alternative choice is installing `homebrew` <http://brew.sh/> and `brew install gcc5` which provides multi-thread OpenMP support.
**Trouble 1**: Can I install `clang-omp` for supporting OpenMP without using `gcc`?
**Solution 1**: it is not support and may have linking errors.