--- lib/ortho/trapezoid.c.orig 2016-09-20 04:45:02 UTC +++ lib/ortho/trapezoid.c @@ -30,6 +30,11 @@ #define log2(x) (log(x)/log(2)) #endif +#include +#if __FreeBSD_version <= 704101 || (__FreeBSD_version >= 800000 && __FreeBSD_version < 802502) || (__FreeBSD_version >= 900000 && __FreeBSD_version < 900027) +#define log2(x) (log(x)/log(2)) +#endif + /* Node types */ #define T_X 1