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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
1 changed files with 1 additions and 1 deletions
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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. 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? **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`? **Trouble 1**: Can I install `clang-omp` for supporting OpenMP without using `gcc`?
**Solution 1**: it is not support and may have linking errors. **Solution 1**: it is not support and may have linking errors.