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# Checks whether getrandom or getentropy are is available.
# Defines HAVE_GERANDOM or HAVE_GETENTROPY if it is.
#
# CHECK_RANDOM([ACTION-SUCCESS], [ACTION-FAILURE])
AC_DEFUN([CHECK_RANDOM],
[
AC_MSG_CHECKING([for getrandom])
AC_LINK_IFELSE([
AC_LANG_PROGRAM([[
#include <sys/random.h>
]], [[
(void)getrandom;
return 0;
]])
], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_GETRANDOM], [1], [getrandom can be used])
m4_default([$1], :)
], [
AC_MSG_RESULT([no])
AC_MSG_CHECKING([for getentropy])
AC_LINK_IFELSE([
AC_LANG_PROGRAM([[
#include <sys/types.h>
#ifdef __APPLE__
#include <Availability.h>
#include <sys/random.h>
#endif
#include <unistd.h>
]], [[
(void)getentropy;
return 0;
]])
], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_GETENTROPY], [1], [getentropy can be used])
m4_default([$1], :)
], [
AC_MSG_RESULT([no])
m4_default([$2], :)
])
])
])
|
