Revision 1905112

Merge the r1878379 group from trunk:

 * r1878379, r1883719, r1883722, r1884610
   Distinguish configure scripts on release mode and non release mode.
   Justification:
     Building process should not be prevented by swig installed in users'
     environment when users use release tar balls.
   Votes:
     +1: futatuki, stsp, jamessan