Update how to define SOFTWAREID, add UNKNOWN architecture

Add an UNKNOWN architecture, use if/elif block instead of sequence of ifdef

src/python/pyrte.c

@@ -393,5 +393,5 @@
 #define SOFTWAREVN "x.0.0"  /** 'x' will be updated with '2' or '3' below **/
 /** ----------------^^^^^ and IDENTIFICATION=x.n.n in BUILD_PYRTE[n].COM **/
 #define SOFTWARENM "PYRTE"
-#ifdef __ALPHA
+#if defined(__ALPHA)
 #  define SOFTWAREID SOFTWARENM " AXP-" SOFTWAREVN
@@ -397,4 +397,3 @@
 #  define SOFTWAREID SOFTWARENM " AXP-" SOFTWAREVN
-#endif
-#ifdef __ia64
+#elif defined(__ia64)
 #  define SOFTWAREID SOFTWARENM " IA64-" SOFTWAREVN
@@ -400,4 +399,3 @@
 #  define SOFTWAREID SOFTWARENM " IA64-" SOFTWAREVN
-#endif
-#ifdef __VAX
+#elif defined(__VAX)
 #  define SOFTWAREID SOFTWARENM " VAX-" SOFTWAREVN
@@ -403,4 +401,6 @@
 #  define SOFTWAREID SOFTWARENM " VAX-" SOFTWAREVN
+#else
+#  define SOFTWAREID SOFTWARENM " UNKNOWN-" SOFTWAREVN
 #endif
 
 #define SOFTWAREGPL \