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#include <Python.h>

#include <stdio.h>

PyMODINIT_FUNC inittestmod_testsubmod(void); /*proto*/

int main(void) {

// Trace modules loading

//setenv("PYTHONVERBOSE", "1", 0);

// Load additional modules installed relative to current directory

setenv("PYTHONPATH", ".", 0);

Py_InitializeEx(0);

//inittestmod_testsubmod();

static struct _inittab builtins[] = {

{"testmod.testsubmod", inittestmod_testsubmod},

{NULL, NULL}

};

PyImport_ExtendInittab(builtins);

PyRun_SimpleString("import testmod.testsubmod; testmod.testsubmod.myputs()");

Py_Finalize();

}

cat <<'EOF' > testmod/testsubmod.pyx

cdef extern from "stdio.h":

int puts(const char *s);

def myputs():

puts("\n\nHELLOOOOOOOOOO\n\n");

EOF

cython testmod/testsubmod.pyx

sed -i -e 's|Py_InitModule4("\([^"]\+\)"|Py_InitModule4("testmod.\1"|' \

-e 's|^__Pyx_PyMODINIT_FUNC init|__Pyx_PyMODINIT_FUNC inittestmod_|' testmod/testsubmod.c

gcc -I../../Include -I.. testmod/testsubmod.c main.c ../libpython2.7.a -lm -ldl -lutil && ./a.out

See also https://mdqinc.com/blog/2011/08/statically-linking-python-with-cython-generated-modules-and-packages/