Make arch-specific constants dependent on sys.info().machine

pkg/os/lib/src/system_posix.dart

 // Copyright (c) 2014, the Dartino project authors. Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE.md file.
 
 part of os;
 
 const int F_GETFD = 1;
 const int F_SETFD = 2;
 const int F_GETFL = 3;
 const int F_SETFL = 4;
@@ skipping 41 matching lines @@
       ForeignLibrary.main.lookup("unlink");
   static final ForeignFunction _write =
       ForeignLibrary.main.lookup("write");
   static final ForeignFunction _sendto =
       ForeignLibrary.main.lookup("sendto");
   static final ForeignFunction _recvfrom =
       ForeignLibrary.main.lookup("recvfrom");
   static final ForeignFunction _uname =
       ForeignLibrary.main.lookup("uname");
 
+  static final bool isMips = sys.info().machine == 'mips';
+
   int get AF_INET => 2;
   int get AF_INET6;
 
-  int get SOCK_STREAM => 1;
-  int get SOCK_DGRAM => 2;
+  int get SOCK_STREAM => isMips ? 2 : 1;
+  int get SOCK_DGRAM => isMips ? 1 : 2;
 
   int get O_RDONLY => 0;
   int get O_WRONLY => 1;
   int get O_RDWR => 2;
   int get O_CREAT;
   int get O_TRUNC;
   int get O_APPEND;
   int get O_CLOEXEC;
   int get O_NONBLOCK;
 
@@ skipping 314 matching lines @@
       address += UTSNAME_LENGTH;
       fp = new ForeignPointer(address);
       var machine = cStringToString(fp);
       return new SystemInformation(operatingSystemName, nodeName, release,
                                    version, machine);
     } finally {
       utsname.free();
     }
   }
 }