+#
+# Usage: SILC_SYSTEM_IS_SMP([ACTION-IF-FOUND] [, ACTION-IF-NOT-FOUND]
+# [, ACTION-IF-NOT-DETECTED])
+#
+# The ACTION-IF-NOT-DETECTED is called if we could not detect whether or
+# not the system is SMP.
+#
+# x_is_smp variable is set to true or false as a result for calling this
+# function. Caller may use the variable to check for the result in the
+# code.
+#