On 10/4/19 12:27 PM, Neil C Smith wrote:
After making sure both java -version and javac -version give 8,
cd into the netbeans directory and run `ant` as per
http://netbeans.apache.org/download/dev/index.html
Thank you, Neil. That prompted me to figure out how I got off to such a
bad start. It was JAVA_HOME.
I think it went like this ...
I made sure, as you suggest, to have the correct JDK and Ant versions on
my PATH:
$ which java; java -version
/usr/bin/java
openjdk version "1.8.0_222"
OpenJDK Runtime Environment
(build 1.8.0_222-8u222-b10-1ubuntu1~16.04.1-b10)
OpenJDK 64-Bit Server VM (build 25.222-b10, mixed mode)
$ which javac; javac -version
/usr/bin/javac
javac 1.8.0_222
$ which ant; ant -version
/home/john/opt/apache-ant-1.10.7/bin/ant
Apache Ant(TM) version 1.10.7 compiled on September 1 2019
But when I ran the build, I got compilation errors:
$ ant
...
[javac]
/home/john/tmp/netbeans/nbbuild/build/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/platform/JDKPlatformProvider.java:120:
error: reference to newFileSystem is ambiguous
[javac] ctSym2FileSystem.put(file, fs =
FileSystems.newFileSystem(file, null));
[javac] ^
[javac] both method newFileSystem(Path,ClassLoader) in FileSystems
and method newFileSystem(Path,Map<String,?>) in FileSystems match
[javac] 4 errors
[javac] 9 warnings
BUILD FAILED
...
Total time: 16 seconds
The compilation errors were due to Ant using the JDK commands defined by
the JAVA_HOME environment variable instead of the ones on my PATH:
$ ant -diagnostics | grep java.version
ant.java.version: 13
java.version : 13
java.version.date : 2019-09-17
And JAVA_HOME was defined because I'm building NetBeans on my
development workstation instead of on a separate build machine as I do
for JavaFX and the JDK.
I think "mlist" had a similar problem with ANT_HOME, which will cause
the "ant" command on your PATH to transform itself into whatever version
is defined by the environment variable! Setting all these environment
variables explicitly in a simple Bash script solved the problems for
both of us.
In retrospect, it would be nice to have a fourth item on the page you
linked:
Apache NetBeans source and daily builds
https://netbeans.apache.org/download/dev/index.html
Building from source
You can of course build Apache NetBeans from source. To do so:
1. Clone the https://github.com/apache/netbeans GitHub repository.
2. Install Oracle’s Java or Open JDK (v8, v11).
3. Install Apache Ant 1.10 or greater (https://ant.apache.org/).
4. Unset JAVA_HOME and ANT_HOME, or set them both appropriately.
Thanks again,
John
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