cc1plus: warning: command line option “-Wstrict-prototypes” is valid for Ada/C/ObjC but not for C++

Question

I am building a C++ extension for use in Python. I am seeing this warning being generated during the compilation process - when a type:

python setup.py build         


        

Answer 1

-Wstrict-prototypes option is read by distutils from /usr/lib/pythonX.Y/config/Makefile as part of OPT variable. It seems hackish, but you can override it by setting os.environ['OPT'] in your setup.py.

Here is a code that seems not too harmful:

import os
from distutils.sysconfig import get_config_vars

(opt,) = get_config_vars('OPT')
os.environ['OPT'] = " ".join(
    flag for flag in opt.split() if flag != '-Wstrict-prototypes'
)