RFR (XXS) 8224790: Remove Xusage.txt file

[Daniel D. Daugherty]

On 5/25/19 1:49 AM, David Holmes wrote:
> Bug: https://bugs.openjdk.java.net/browse/JDK-8224790
> webrev: http://cr.openjdk.java.net/~dholmes/8224790/webrev/

make/hotspot/gensrc/GenerateSources.gmk
     No comments.

src/hotspot/share/Xusage.txt
     Deleted file.

Thumbs up!

When I did a sanity check grep for Xusage.txt I was surprised that
it "showed up" in binary files. For example:

Binary file 
./build/macosx-x86_64-normal-server-release/images/jdk/jmods/java.base.jmod 
matches

Hopefully that's an artifact of the build process?!?!?

Dan


>
> Before Java 7 the Xusage.txt file was used to print the "java -X" help 
> information in English. From Java 7 this information was provided in 
> localised format by the launcher. The Xusage.txt file was not removed 
> at the time because it was also used by the gamma launcher. But the 
> gamma launcher was removed in java 8 - JDK-8008772. The information in 
> Xusage.txt has become stale and incomplete (despite several edits post 
> Java 7). It should just be removed.
>
> Also removed the build logic that copied the file into the JDK image.
>
> Thanks,
> David