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ijleesw/install-openmp-macos.sh

Created December 4, 2018 14:45
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Install OpenMP on MacOS
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install-openmp-macos.sh
#!/bin/bash
# Install
brew install llvm
brew install libomp
# Compile
# clang++ test.cpp -o test -Xpreprocessor -fopenmp -lomp
@kanglicheng
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kanglicheng commented Apr 6, 2024

This is how it worked for me:

install https://brew.sh/

Install required packages brew install llvm libomp

in command line set variables that will be used for compilation (can be done by editing .zprofile):

export PATH="/opt/homebrew/opt/llvm/bin:$PATH"
export LDFLAGS="-L/opt/homebrew/opt/llvm/lib"
export CPPFLAGS="-I/opt/homebrew/opt/llvm/include"

compile program clang++ -fopenmp --std=c++11 -stdlib=libc++ lab04.cpp -o lab04 && ./lab04

worked perfectly for me.
clang++ -fopenmp proj.cpp -o proj

@eriktrom
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eriktrom commented Jul 10, 2024

yeah works perfect

@HeartLaughter
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HeartLaughter commented Nov 23, 2024

it works fine for me, thx alot

@mforotan
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mforotan commented Feb 18, 2025

Does anyone know how to install Libomp without homebrew?
I do not want to use homebrew on my Mac for some limitations.

@db7
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db7 commented Nov 2, 2025

@mforotan - I am using https://pkgsrc.org for that. It has binary packages for macOS. However, I prefer installing the packages in ~/.local, so I do the pkgsrc manual builds:

  • download pkgsrc source .tgz of a stable version and uncompress somewhere, eg, ~/pkgsrc or /usr/local/pkgsrc.
  • bootstrap: cd pkgsrc/boostrap && ./bootstrap --unprivileged --prefix PREFIX ... (check the options)
  • environment: add PREFIX/bin, PREFIX/lib to your PATH and DYLD_LIBRARY_PATH respectively
  • now you are ready to build packages: cd pkgsrc/parallel/openmp && bmake install

For binary packages check here: https://pkgsrc.smartos.org

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