cffi installation got failure on MacOs 12.5 with pip

[Mohammad hasan Farazmand]

I am trying to install "cffi" with pip on MacOs 12.5 but I got an error
python : 3.8.10
pip : 22.2.2
Apple clang version 13.1.6 (clang-1316.0.21.2.5)

Command :

pip install cffi

Error :

/opt/homebrew/bin/gcc-11 -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -I/opt/homebrew/opt/libffi/include -DFFI_BUILDING=1 -DUSE__THREAD -DHAVE_SYNC_SYNCHRONIZE -I/opt/homebrew/Cellar/libffi/3.4.2/include -I/Users/faraz/.pyenv/versions/3.8.10/include/python3.8 -c c/_cffi_backend.c -o build/temp.macosx-12.5-arm64-3.8/c/_cffi_backend.o -iwithsysroot/usr/include/ffi gcc-11: error: unrecognized command-line option '-iwithsysroot/usr/include/ffi' error: command '/opt/homebrew/bin/gcc-11' failed with exit status 1 

[Armin Rigo]

Hi,

On Fri, 5 Aug 2022 at 12:41, Mohammad hasan Farazmand
<m.h.fa...@gmail.com> wrote:
gcc-11: error: unrecognized command-line option '-iwithsysroot/usr/include/ffi'

Maybe "/opt/homebrew/bin/gcc-11" is gcc, and not clang. We don't
explicitly support gcc on MacOS, as far as I can tell. Contributions welcome.

A bientôt,
Armin Rigo

[Mohammad hasan Farazmand]

Hi, 

Ok, got it. So, I changed the default compiler in the bash profile and it worked 

I added the following lines to ~/.bash_profile

# Set Clang as the default compiler for the system 

export CC=clang 

export CFLAGS=-Qunused-arguments 

export CPPFLAGS=-Qunused-arguments