Small change triggers 8990 file compiling?

[Weijun Wang]

Hi All

I'm using the new build on a Ubuntu 12.04 64 bit. Configure runs ok, and 
make runs ok. Now I have a good build output directory. Running make 
again costs no time at all.

Then I qpush a mq patch, which only touches 30 or so files deep inside 
src/share/classes/com/sun/security and src/share/classes/sun/security of 
the jdk repo, and running make shows

    Compiling 8990 files for BUILD_JDK

and a while bunch of other c files which costs 00:01:20.

Is that an expected behavior?

Thanks
Max