build_libevolve.py

from cffi import FFI
ffibuilder = FFI()

ffibuilder.cdef("""
	void evolve(double *u, double *u_previous, int nx, int ny, double a, double dt, double dx2, double dy2)
                """)

# 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("_libevolve",
"""
     #include <string.h>   // the C header of the library
""",
   library_dirs = [],  # here we can provide where the library is located,
                       # as we are using C standard library empty list is enough
   libraries = ['libevolve']   # name of the library we want to interface
)

ffibuilder.compile(verbose=True)