Gcc bugs break java/jdk15 build? [Workaround]

[Ken Yamada]

  Does this mean that GCC 4.2.1 does not solve "loop optimization bug" pointed out by Andrey Chernov (http://docs.freebsd.org/cgi/getmsg.cgi?fetch=282888+0+archive/2007/freebsd-current/20070701.freebsd-current) on 4.2.0?
  
  Is it a good idea of adding -fno-tree-vrp to CFLAGS in /etc/make.conf to avoid this optimization bug for all compilation?  (BTW, I leave -O3 of CFLAGS as is in make.conf and just added -fno-tree-vrp to the end of the line.)