gistfile1.txt

CDEF = """
typedef ... ENGINE;
typedef ... ENGINE_CIPHERS_PTR;
int ENGINE_set_ciphers(ENGINE *, ENGINE_CIPHERS_PTR);
"""

f = cffi.FFI()
f.cdef(CDEF)

lib = f.verify("""
#include <openssl/engine.h>
""",
    libraries=["ssl", "crypto"]
)
f.typeof(lib.ENGINE_set_ciphers)



"""
Traceback (most recent call last):
  File "incomplete.py", line 18, in <module>
    f.typeof(lib.ENGINE_set_ciphers)
  File "/home/alexs/.virtualenvs/CRYPT/local/lib/python2.7/site-packages/cffi/api.py", line 164, in typeof
    res = _builtin_function_type(cdecl)
  File "/home/alexs/.virtualenvs/CRYPT/local/lib/python2.7/site-packages/cffi/api.py", line 487, in _builtin_function_type
    return ffi._get_cached_btype(tp)
  File "/home/alexs/.virtualenvs/CRYPT/local/lib/python2.7/site-packages/cffi/api.py", line 322, in _get_cached_btype
    BType = type.get_cached_btype(self, finishlist)
  File "/home/alexs/.virtualenvs/CRYPT/local/lib/python2.7/site-packages/cffi/model.py", line 37, in get_cached_btype
    BType = self.build_backend_type(ffi, finishlist)
  File "/home/alexs/.virtualenvs/CRYPT/local/lib/python2.7/site-packages/cffi/model.py", line 172, in build_backend_type
    tuple(args), result, self.ellipsis)
  File "/home/alexs/.virtualenvs/CRYPT/local/lib/python2.7/site-packages/cffi/model.py", line 477, in global_cache
    res = getattr(ffi._backend, funcname)(*args)
TypeError: ctype 'ENGINE_CIPHERS_PTR' has incomplete type
"""