ref: b72d6ce7b04d8d0e57b9bc67f8ff038c0b01e08d dir: /src/runtime/config-unix-32.h/
#include "config-unix-64.h" //#undef WORD_SIZE //#define WORD_SIZE 32 #undef FFS #if _POSIX_VERSION >= 200112L #define FFS ffs #endif