[cffi-devel] Grovel fails parsing file

Hi, I'm trying to use sysctl.h under FreeBSD (should also exists under OSX) , but grovel can't parse that file. /usr/include/sys/sysctl.h:699: error: expected declaration specifiers or '...' before 'size_t' grovel.c: In function 'print_double_for_lisp': grovel.c:64: warning: incompatible implicit declaration of built-in function 'memset' The offending line is: int sysctlnametomib(const char *, int *, size_t *); Any clues how to fix this or is it a known feature?