g++ with python.h, how to compile

Question

I compile one test code with g++ without any issue.

#include \"Python.h\"  

int main(int argc, char** argv)  
{  
    Py         


        

Answer 1

This is a bug in Python: https://bugs.python.org/issue1045893

If you include first Python.h, the compiler won't complain but GNU libc's /usr/include/features.h will override it anyway when _GNU_SOURCE is defined:

# undef _POSIX_C_SOURCE # define _POSIX_C_SOURCE 200809L # undef _XOPEN_SOURCE # define _XOPEN_SOURCE 700

Answer 2

Take a look at Lucas's comment for the answer:

"To get rid of the _POSIX_C_SOURCE warning, make sure to include Python.h before all other header files."

I had the same problem. I use Boost Python, so for me I moved the include of boost/python.hpp to the first line in my .cpp file.

(Lukas, post your comment as an answer so the person who asked can mark it as the right answer, and the question won't remain 'unanswered' in StackOverflow.)