Getting clang: error: unsupported option '-fopenmp' when installing with pip on M1 mac

[ulfaslakprecis]

Hi!

I'm eager to try this library out. Unfortunately I get an error upon installation:

clang: error: unsupported option '-fopenmp'

• I updated llvm using homebrew (did not solve the problem).

• clang --help | grep fopenmp returns

    -fopenmp                Parse OpenMP pragmas and generate parallel code.
  

so it's just strange that this argument is not recognized during installation.

Any idea how to solve this?

My specs are:

Apple M1 Pro (2021)
MacOS 12.5.1
Python 3.10

[salimamoukou]

Hi !

Did you try this recommendation in the Installation section of the readme?

OSX: ACV uses Cython extensions that need to be compiled with multi-threading support enabled. The default Apple Clang compiler does not support OpenMP. To solve this issue, obtain the lastest gcc version with Homebrew that has multi-threading enabled: see for example pysteps installation for OSX.