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| author | Martin Ebourne <martin@ebourne.me.uk> | 2005-12-07 16:34:47 +0000 |
|---|---|---|
| committer | Martin Ebourne <martin@ebourne.me.uk> | 2005-12-07 16:34:47 +0000 |
| commit | 81d8eda2419e7a23088a98cdfc52a305c9ceac0d (patch) | |
| tree | 27143d7b539a8bf2e23cc18e2f598804fa8d784d /infrastructure/m4/ax_random_device.m4 | |
| parent | 065dc6f8cd168e3ee6e71ddfb06f42a92abfabbd (diff) | |
Merged martin/autoconf at r35 to trunk
Diffstat (limited to 'infrastructure/m4/ax_random_device.m4')
| -rw-r--r-- | infrastructure/m4/ax_random_device.m4 | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/infrastructure/m4/ax_random_device.m4 b/infrastructure/m4/ax_random_device.m4 new file mode 100644 index 00000000..ab9b56fd --- /dev/null +++ b/infrastructure/m4/ax_random_device.m4 @@ -0,0 +1,31 @@ +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 |