It looks like if BUILD_HOTSPOT is true then we don't check the jvmti.h
which avoids the build error. See Sanity.gmk:210-213:

# only check hotspot binary paths if we are not building them from scratch
ifneq ($(BUILD_HOTSPOT), true)
sanity-all:: hotspot_binaries hotspot_import
endif

hotspot_import is what checks the header files. It would be nice if we
can still check the headers even if BUILD_HOTSPOT is true.


###@###.### 2005-2-10 20:59:28 GMT