Distinguish between IA-32 and non-x86.

In case we make ws_cpuid() work on IA-32 processors, add a separate
"always returns no" version of ws_cpuid() for non-x86 processors.

Change-Id: Id6fbd3e5c7d4f04063bc9bcd8f1644cd617b297e
Reviewed-on: https://code.wireshark.org/review/6184
Reviewed-by: Guy Harris <guy@alum.mit.edu>

wsutil/ws_cpuid.h

@@ -1,5 +1,5 @@
 /* ws_cpuid.h
- * Get the CPU info
+ * Get the CPU info on x86 processors that support it
  *
  * Wireshark - Network traffic analyzer
  * By Gerald Combs <gerald@wireshark.org>
@@ -51,14 +51,20 @@ ws_cpuid(guint32 *CPUInfo, int selector)
 						: "a"(selector));
 	return 1;
 }
-#else /* (__i386__) */
-
+#elif defined(__i386__)
 static int
 ws_cpuid(guint32 *CPUInfo _U_, int selector _U_)
 {
 	/* TODO: need a test if older proccesors have the cpuid instruction */
 	return 0;
 }
+#elif
+static int
+ws_cpuid(guint32 *CPUInfo _U_, int selector _U_)
+{
+	/* Not x86, so no cpuid instruction */
+	return 0;
+}
 #endif
 
 #else /* Other compilers */