[NETBEANS-6378] Unable to use JEP 247 with ANT projects: error: option -source cannot be used together with --release

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 12.5
• Component/s: core, java - Compiler
• Assignee: Unassigned
• Reporter: Bjoern Voigt
• Created: 10/Jan/22 21:04
• Updated: 10/Jan/22 21:04

Description

JEP 247 enhances javac so that it can compile Java programs to run on selected older versions of the platform.

If for instance javac from JDK 17 should compile a program for Java 8 compatibility, then the following command line is suitable:

javac --release 8 Main.java

The --release option can be specified in Netbeans projects here: Build -> Compiling -> Additional Compiler Options.

Unfortunately the --release option results in build errors, at least with Netbeans ANT projects:

error: option -source cannot be used together with --release

The full build log:

ant -f /tmp/NetBeansProjects/JavaApplication9 -Dnb.internal.action.name=rebuild clean jar
init:
deps-clean:
Updating property file: /tmp/NetBeansProjects/JavaApplication9/build/built-clean.properties
Deleting directory /tmp/NetBeansProjects/JavaApplication9/build
clean:
init:
deps-jar:
Created dir: /tmp/NetBeansProjects/JavaApplication9/build
Updating property file: /tmp/NetBeansProjects/JavaApplication9/build/built-jar.properties
Created dir: /tmp/NetBeansProjects/JavaApplication9/build/classes
Created dir: /tmp/NetBeansProjects/JavaApplication9/build/empty
Created dir: /tmp/NetBeansProjects/JavaApplication9/build/generated-sources/ap-source-output
Compiling 2 source files to /tmp/NetBeansProjects/JavaApplication9/build/classes
error: option -source cannot be used together with --release
error: option -target cannot be used together with --release
Usage: javac <options> <source files>
use --help for a list of possible options
BUILD FAILED (total time: 0 seconds)