The current MacOS X build for HSX-23 requires:

    SA_APPLE_BOOT_JAVA=true
    ALWAYS_PASS_TEST_GAMMA=true

to be specified on the build invocation command line.

That does not integrate well with the JPRT auto build system
and should be fixed.

For SA_APPLE_BOOT_JAVA, the makefile logic should be smarter
and determine where the JDI classes can be found.

For ALWAYS_PASS_TEST_GAMMA, the make/bsd/makefiles/buildtree.make
should set that variable to true when building on Darwin (Mac OS X).
Or more correctly, if ALWAYS_PASS_TEST_GAMMA is not set, then it
should default to "true" on Darwin.