dnl check for in_addr_t definition AC_MSG_CHECKING([for in_addr_t definition]) AC_TRY_COMPILE([ #include <sys/types.h> #include <netinet/in.h> ], [ in_addr_t pt; pt = 0; return pt; ], [ AC_MSG_RESULT(yes) AC_DEFINE([HAVE_IN_ADDR_T],1,[in_addr_t is defined]) ], AC_MSG_RESULT(no))