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from cffi import FFI

ffibuilder = FFI()

# cdef() expects a single string declaring the C types, functions and

# globals needed to use the shared object. It must be in valid C syntax.

ffibuilder.cdef("""

float pi_approx(int n);

""")

# set_source() gives the name of the python extension module to

# produce, and some C source code as a string. This C code needs

# to make the declarated functions, types and globals available,

# so it is often just the "#include".

ffibuilder.set_source("_pi_cffi",

"""

#include "../Shared/dukicalculations.h" // the C header of the library

""",

libraries=['dukicalculations'], # library name, for the linker

extra_compile_args=['-I../Shared/build-win'],

extra_link_args=['/LIBPATH:../Shared/build-win/Release'])

if __name__ == "__main__":

ffibuilder.compile(verbose=True)