Problem with JVMCI on Cygwin

[Russ Powers]

Hello,

I've managed to build JVMCI on Cygwin, and the
jdk1.8.0_121\product\jre\bin\server
directory contains the built jvm.dll and jvm.pdb.  However, when I try
using mx on graal-core (with the proper JAVA_HOME set), it gives me this
error:

The VM does not support the minimum JVMCI API version required by Graal.
Cannot read JVMCI version from java.vm.version property: 25.71-b01-internal.
Set the JVMCI_VERSION_CHECK environment variable to "ignore" to suppress
this error or to "warn" to emit a warning and continue execution.
Currently used Java home directory is c:\proj\graal\tools\graal-
jvmci-8\jdk1.8.0_121\product\jre.

It looks like the JVMCI info is missing, and when I run ./java -version, it
doesn't contain the JVMCI info either.  I checked, and it's definitely
using the newly built jvm.dll.  Is there something else I should be doing
here?  I'm stumped.  Thanks in advance.

Russ