make: unifdef for other OSes (undefined)

@@ -922,15 +922,11 @@
         Name            value;
         int             set_host, set_target;
 #ifdef NSE
         Property        macro;
 #endif
-#if defined(linux)
-        const char      *mach_command = NOCATGETS("/bin/uname -p");
-#else
         const char      *mach_command = NOCATGETS("/bin/mach");
-#endif
 
         set_host = (get_prop(host_arch->prop, macro_prop) == NULL);
         set_target = (get_prop(target_arch->prop, macro_prop) == NULL);
 
         if (set_host || set_target) {

@@ -1377,26 +1373,15 @@
                         new_value = old_vr;
                 } else {
                         new_value = ALLOC_WC(length);
                         new_value_allocated = true;
                         WCSTOMBS(mbs_buffer, old_vr);
-#if !defined(linux)
                         (void) wsprintf(new_value,
                                         NOCATGETS("/usr/arch/%s/%s:%s"),
                                         ha->string_mb + 1,
                                         ta->string_mb + 1,
                                         mbs_buffer);
-#else
-                        char * mbs_new_value = (char *)getmem(length);
-                        (void) sprintf(mbs_new_value,
-                                        NOCATGETS("/usr/arch/%s/%s:%s"),
-                                        ha->string_mb + 1,
-                                        ta->string_mb + 1,
-                                        mbs_buffer);
-                        MBSTOWCS(new_value, mbs_new_value);
-                        retmem_mb(mbs_new_value);
-#endif
                 }
                 if (new_value[0] != 0) {
                         (void) setvar_daemon(virtual_root,
                                              GETNAME(new_value, FIND_LENGTH),
                                              false,