When compiling with /opt/SUNWspro/SC4.2/bin/cc on Solaris, __svr4__ is

not defined, but __SVR4 is.

e_os.h

@@ -403,7 +403,7 @@ extern HINSTANCE _hInstance;
 #endif
 #endif
 
-#if defined(sun) && !defined(__svr4__)
+#if defined(sun) && !defined(__svr4__) && !defined(__SVR4)
 #define memmove(s1,s2,b) bcopy((s2),(s1),(n))
 #define strtoul(s,e,b) ((unsigned long int)strtol((s),(e),(b)))
 #endif