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AC_DEFUN([DOVECOT_ARC4RANDOM], [
AC_ARG_WITH([libbsd], AS_HELP_STRING(
[--with-libbsd],
[Use libbsd (default is no)]
), [want_libbsd=$withval], [want_libbsd=no])
AC_CHECK_FUNC([arc4random_buf], AC_DEFINE([HAVE_ARC4RANDOM], [1], [Define this if you have arc4random_buf()]), [
if test "$want_libbsd" = yes; then
AC_CHECK_LIB([bsd], [arc4random_buf], [
LIBS="$LIBS -lbsd"
AC_DEFINE([HAVE_ARC4RANDOM], [1], [Define this if you have arc4random_buf()])
AC_DEFINE([HAVE_LIBBSD], [1], [Define this if you have libbsd])
])
fi
])
])
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