如何在新的MacBook Pro(带有Mac OS Catalina)上安装openMP?

问题描述

我安装了Xcode(以及命令行工具)，但终端机提示(编译时):

I installed Xcode (and also the command line tools) but terminal says (when I'm compiling):

gcc -o task -fopenmp task.c
clang: error: unsupported option '-fopenmp'

我尝试通过brew安装openmp，但是人们说它在自制软件上不再可用，他们建议尝试

I tried to install openmp via brew but people say that it's not available anymore on homebrew, they suggest to try

brew instal llvm

但是我得到了同样的错误.我也在骨场尝试过

But I get the same error.I tried also in the boneyard

brew install homebrew/boneyard/clang-omp

但是该存储库不再存在.

but the repository doesn't exist anymore.

你能帮我吗?我只需要学习openMP，我认为安装起来并不那么困难...

Could you help me?I just need to learn openMP, I don't think that is so difficult to install...

谢谢！

亲切的问候，

Nico

推荐答案

此 https://iscinumpy.gitlab.io/post/omp-on-high-sierra/建议执行以下操作:

brew install libomp

要安装OpenMP运行时组件/库.

To install the OpenMP runtime components/libraries.

然后，在编译时:

• 在编译步骤(-c选项)中使用-Xpreprocessor -fopenmp代替-fopenmp
• 将-lomp添加到链接步骤

• use -Xpreprocessor -fopenmp in place of -fopenmp in the compile step (-c option)
• add -lomp to the linking step

请注意，以上页面还提到CMake 3.12或更高版本将自动找到在MacOS上添加OpenMP的正确方法:

Note that the above page also mention that CMake 3.12 or later will automatically find the right way of adding OpenMP on MacOS:

cmake_minimum_required(VERSION 3.12)
project(openmptest CXX)

add_executable(sample sample.cpp)

find_package(OpenMP REQUIRED)
target_link_libraries(sample PRIVATE OpenMP::OpenMP_CXX)

注意:我没有测试任何一个，但是听起来比较理智

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