What is ARCH on Mac

[Weijun Wang]

Hi All

I'm quite confused on this. I'm able to build openjdk-8 on my Mac and 
the build is inside build/macosx-amd64 direcory. The "make sanity" 
command also shows ARCH=amd64. However, if I go into the test directory 
and run "make" there, it's trying to test against build/macosx-i586. 
Then I find out it's because on my system "uname -m" returns i386.

Is there any problem with my system?

Thanks
Max