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DOC: Add tip about macOS SDK

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Eric Larson 2022-06-16 07:03:57 -04:00
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@ -240,6 +240,8 @@ If you compile this library with `USE_OPENMP=1`, you should set the `OMP_NUM_THR
environment variable; OpenBLAS ignores `OPENBLAS_NUM_THREADS` and `GOTO_NUM_THREADS` when
compiled with `USE_OPENMP=1`.
On newer versions of Xcode and on arm64, you might need to compile with a newer macOS target (11.0) than the default (10.8) with `MACOSX_DEPLOYMENT_TARGET=11.0`, or switch your command-line tools to use an older SDK (e.g., [13.1](https://developer.apple.com/download/all/?q=Xcode%2013)).
### Setting the number of threads at runtime
We provide the following functions to control the number of threads at runtime: