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-dnl @synopsis AX_RANDOM_DEVICE
-dnl
-dnl This macro will check for a random device, allowing the user to explicitly
-dnl set the path. The user uses '--with-random=FILE' as an argument to
-dnl configure.
-dnl
-dnl If A random device is found then HAVE_RANDOM_DEVICE is set to 1 and
-dnl RANDOM_DEVICE contains the path.
-dnl
-dnl @category Miscellaneous
-dnl @author Martin Ebourne
-dnl @version 2005/07/01
-dnl @license AllPermissive
-
-AC_DEFUN([AX_RANDOM_DEVICE], [
- AC_ARG_WITH([random],
- [AC_HELP_STRING([--with-random=FILE], [Use FILE as random number seed [auto-detected]])],
- [RANDOM_DEVICE="$withval"],
- [AC_CHECK_FILE("/dev/urandom", [RANDOM_DEVICE="/dev/urandom";],
- [AC_CHECK_FILE("/dev/arandom", [RANDOM_DEVICE="/dev/arandom";],
- [AC_CHECK_FILE("/dev/random", [RANDOM_DEVICE="/dev/random";])]
- )])
- ])
- if test "x$RANDOM_DEVICE" != "x" ; then
- AC_DEFINE([HAVE_RANDOM_DEVICE], 1,
- [Define to 1 (and set RANDOM_DEVICE) if a random device is available])
- AC_SUBST([RANDOM_DEVICE])
- AC_DEFINE_UNQUOTED([RANDOM_DEVICE], ["$RANDOM_DEVICE"],
- [Define to the filename of the random device (and set HAVE_RANDOM_DEVICE)])
- fi
-])dnl