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4229457068
If not available, give an error. The user may also configure qpdf to use an insecure random number generator.
32 lines
1.2 KiB
Plaintext
32 lines
1.2 KiB
Plaintext
dnl @synopsis AX_RANDOM_DEVICE
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dnl
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dnl This macro will check for a random device, allowing the user to explicitly
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dnl set the path. The user uses '--with-random=FILE' as an argument to
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dnl configure.
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dnl
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dnl If A random device is found then HAVE_RANDOM_DEVICE is set to 1 and
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dnl RANDOM_DEVICE contains the path.
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dnl
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dnl @category Miscellaneous
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dnl @author Martin Ebourne
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dnl @version 2005/07/01
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dnl @license AllPermissive
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AC_DEFUN([AX_RANDOM_DEVICE], [
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AC_ARG_WITH([random],
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[AC_HELP_STRING([--with-random=FILE], [Use FILE as random number seed [auto-detected]])],
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[RANDOM_DEVICE="$withval"],
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[AC_CHECK_FILE("/dev/urandom", [RANDOM_DEVICE="/dev/urandom";],
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[AC_CHECK_FILE("/dev/arandom", [RANDOM_DEVICE="/dev/arandom";],
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[AC_CHECK_FILE("/dev/random", [RANDOM_DEVICE="/dev/random";])]
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)])
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])
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if test "x$RANDOM_DEVICE" != "x" ; then
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AC_DEFINE([HAVE_RANDOM_DEVICE], 1,
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[Define to 1 (and set RANDOM_DEVICE) if a random device is available])
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AC_SUBST([RANDOM_DEVICE])
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AC_DEFINE_UNQUOTED([RANDOM_DEVICE], ["$RANDOM_DEVICE"],
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[Define to the filename of the random device (and set HAVE_RANDOM_DEVICE)])
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fi
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])dnl
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