Merge branch 'master' of github.com:zathras/java.net

hdcookbook/README.md

@@ -3,7 +3,9 @@
 This directory is an archive of the old hdcookbook open-source project
 from java.net.  It has been updated to run on JDK 1.8, and was tested
 and known to work in January 2022.  See README.pdf for a description
-of the contents.
+of the contents, and see
+<a href="https://hdcookbook.jovial.com/">https://hdcookbook.jovial.com/</a>
+for an archive of the companion web site.
 
 The following worked on Ubuntu Linux 20.x, with the standard JDK 1.8
 installation selected:
@@ -26,4 +28,31 @@ OpenJDK 64-Bit Server VM (build 25.312-b07, mixed mode)
 billf@Zathras:~/github/java.net/hdcookbook$ ant -version
 Apache Ant(TM) version 1.10.12 compiled on October 13 2021
 ```
+And, similarly on MacOS 11.6.2 (Big Sur, M1 silicon):
+```
+billf@londo:~/github/java.net/hdcookbook$ ant
+Buildfile: /Users/billf/github/java.net/hdcookbook/build.xml
+
+   ...  many lines of build output  ...
+
+build-hdcookbook-xlets:
+
+BUILD SUCCESSFUL
+Total time: 8 seconds
+```
+```
+billf@londo:~/github/java.net/hdcookbook$ java -version
+openjdk version "1.8.0_302"
+OpenJDK Runtime Environment (Zulu 8.56.0.23-CA-macos-aarch64) (build 1.8.0_302-b08)
+OpenJDK 64-Bit Server VM (Zulu 8.56.0.23-CA-macos-aarch64) (build 25.302-b08, mixed mode)
+```
+```
+billf@londo:~/github/java.net/hdcookbook$ ant -version
+Apache Ant(TM) version 1.10.12 compiled on October 13 2021
+```
+## -XDignore.symbol.file
 
+Note that `DiscCreationTools/security/make/build.xml` passes
+`-XDignore.symbol.file` to `javac`.  This is necessary; it appears
+some of the tools used for signing are hidden in JDK 1.8, unless
+this option is passed.