AC_DEFUN([DOVECOT_ARC4RANDOM], [

AC_CHECK_FUNC([arc4random], [

AC_DEFINE([HAVE_ARC4RANDOM], [1], [Define this if you arc4random()])

], [

AC_CHECK_LIB([bsd], [arc4random], [

LIBS="$LIBS -lbsd"

AC_DEFINE([HAVE_ARC4RANDOM], [1], [Define this if you arc4random()])

AC_DEFINE([HAVE_LIBBSD], [1], [Define this if you have libbsd])

])

])

])