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@ijleesw
Created December 4, 2018 14:45
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Install OpenMP on MacOS
#!/bin/bash
# Install
brew install llvm
brew install libomp
# Compile
# clang++ test.cpp -o test -Xpreprocessor -fopenmp -lomp
@rinibhasin
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omp.h file not found while using open mp

@siwonpawel
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@rinibhasin have you successfully installed openmp in MacOS?

@snej
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snej commented Dec 13, 2023

You have to add Homebrew's include and lib directories to Clang's header and library search paths:

-L/opt/homebrew/opt/libomp/lib -I/opt/homebrew/opt/libomp/include

@antongryban
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(base) antongryban@Antons-MacBook-Air ~ % brew install llvm
brew install libomp
zsh: command not found: brew
zsh: command not found: brew

@siwonpawel
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siwonpawel commented Dec 21, 2023

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

@snej
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snej commented Dec 22, 2023

@kanglicheng
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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

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