Error on build

[javafx at use.startmail.com]

Hi All,

New member to this group. I am encountering a little trouble  when I 
try to build OpenJFX. I am following the instructions here: (using 
Cygwin on Win 7):

https://wiki.openjdk.java.net/display/OpenJFX/Building+OpenJFX

When I run gradle after cloning the OpenJFX repository, I get a "build 
failed with exception" . I include the output from the entire run just 
in case it's significant:



$ gradle
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by 
org.gradle.internal.reflect.JavaMethod 
(file:/C:/gradle/lib/gradle-base-services-3.1.jar) to method 
java.lang.ClassLoader.getPackages()
WARNING: Please consider reporting this to the maintainers of 
org.gradle.internal.reflect.JavaMethod
WARNING: Use --illegal-access=warn to enable warnings of further 
illegal reflective access operations
WARNING: All illegal access operations will be denied in a future 
release
:buildSrc:generateGrammarSource UP-TO-DATE
:buildSrc:compileJava UP-TO-DATE
:buildSrc:compileGroovy UP-TO-DATE
:buildSrc:processResources UP-TO-DATE
:buildSrc:classes UP-TO-DATE
:buildSrc:jar UP-TO-DATE
:buildSrc:assemble UP-TO-DATE
:buildSrc:compileTestJava UP-TO-DATE
:buildSrc:compileTestGroovy UP-TO-DATE
:buildSrc:processTestResources UP-TO-DATE
:buildSrc:testClasses UP-TO-DATE
:buildSrc:test UP-TO-DATE
:buildSrc:check UP-TO-DATE
:buildSrc:build UP-TO-DATE

FAILURE: Build failed with an exception.

* Where:
Script 'C:\cygwin64\home\mdbg\rt\buildSrc\win.gradle' line: 91

* What went wrong:
A problem occurred evaluating script.
> FAIL: WINSDK_DIR not defined

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or 
--debug option to get more log output.

BUILD FAILED

Total time: 1.376 secs


I should add that even though the tutorial doesn't mention to do it, I 
cd-ed into the folder named rt, which was created by Mercurial when I 
cloned OpenJFX,  I called gradle from there. Calling it from the 
directory containing rt resulted in nothing happening , which makes 
sense afaik.

the variable WINSDK is  not one I am familiar with- it's not any 
environment or system variable on my machine and the tutorial doesn't 
say anything about it. I hesitate to start arbitrarily hacking build 
files based on error messages. It seems as though it ought to just work 
and perhaps this is a bug I should report or is it something else ?


Thank you!