libffi

I'm getting this error when trying to install bcrypt with pip. I have libffi installed in a couple places (the Xcode OS X SDK, and from homebrew), but I don't know how to tell pip to look for it. Any suggestions? Downloading/unpacking bcrypt==1.0.2 (from -r requirements.txt (line 41)) Running setup.py egg_info for package bcrypt OS/X: confusion between 'cc' versus 'gcc' (see issue 123) will not use '__thread' in the C code c/_cffi_backend.c:14:10: fatal error: 'ffi.h' file not found #include <ffi.h> ^ 1 error generated. Traceback (most recent call last): File "<string>", line 16, in <module>

Suppose there's a list of arguments stored somehow, in a array for example. Given a function pointer , how could I make a call to it passing the stored list of arguments? I'm not trying to pass the array as an argument ok. You got it, ok? I want to pass each of its elements as an argument. An array is just to illustrate, I could be storing the arguments in some tuple structure. Also, look that I have at hand a function pointer and may have a signature in string format . I'm not trying to just define a function that is able to deal with a variadic list. The only way I see how to do that is by