Here is a list of all macros with links to the files they belong to:

BJ_PI : math.h
BJ_PI_D : math.h
BJ_PI_F : math.h
BJ_PI_L : math.h
BJ_PIXEL_GET_BPP : pixel.h
BJ_PIXEL_GET_LAYOUT : pixel.h
BJ_PIXEL_GET_ORDER : pixel.h
BJ_PIXEL_GET_TYPE : pixel.h
BJ_PIXEL_LAYOUT_1555 : pixel.h
BJ_PIXEL_LAYOUT_565 : pixel.h
BJ_PIXEL_LAYOUT_8888 : pixel.h
BJ_PIXEL_MODE_MAKE : pixel.h
BJ_PIXEL_MODE_MAKE_BITFIELD_16 : pixel.h
BJ_PIXEL_MODE_MAKE_BITFIELD_32 : pixel.h
BJ_PIXEL_MODE_MAKE_BYTES : pixel.h
BJ_PIXEL_MODE_MAKE_INDEXED : pixel.h
BJ_PIXEL_ORDER_ABGR : pixel.h
BJ_PIXEL_ORDER_ARGB : pixel.h
BJ_PIXEL_ORDER_BGR : pixel.h
BJ_PIXEL_ORDER_BGRA : pixel.h
BJ_PIXEL_ORDER_BGRX : pixel.h
BJ_PIXEL_ORDER_RGB : pixel.h
BJ_PIXEL_ORDER_RGBA : pixel.h
BJ_PIXEL_ORDER_RGBX : pixel.h
BJ_PIXEL_ORDER_XBGR : pixel.h
BJ_PIXEL_ORDER_XRGB : pixel.h
BJ_PIXEL_TYPE_BITFIELD : pixel.h
BJ_PIXEL_TYPE_BYTES : pixel.h
BJ_PIXEL_TYPE_INDEX : pixel.h
bj_pow : math.h
bj_powd : math.h
bj_powf : math.h
bj_powl : math.h
PAD_H : pong.c
PAD_MARGIN : pong.c
PAD_SPEED : pong.c
PAD_W : pong.c
PORT : net_tcp_nonblocking.c, net_tcp_timeout.c, net_udp_broadcast_recv.c, net_udp_broadcast_send.c, net_udp_server.c