Date: Thu, 11 Dec 2025 13:33:50 +0100 (CET) From: Ronald Klop <ronald-lists@klop.ws> To: java@freebsd.org Subject: javac source & target Message-ID: <707700450.1043.1765456430535@localhost>
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[-- Attachment #1 --] Hi, I'm looking into the PR "Mk/bsd.default-versions.mk: update JAVA_DEFAULT to 21". https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272855 Quiet some work involves changing hardcoded -source -target settings to javac. Quite some ports have targets lower than 8 which is not supported by recent javac version. /usr/local/openjdk21/bin/javac --help: --target <release>, -target <release> Generate class files suitable for the specified Java SE release. Supported releases: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 Openjdk17 supports 7-17 and openjdk25 supports 8-25. Mind that java can read classes going back to version 1. It is just that the javac compiler can't generate them anymore. To make class files usable between ports I think it is user friendly to compile targeted for the oldest JDK in the ports tree which is now openjdk8. Or we can aim to remove the source/target definitions and compile for JAVA_DEFAULT. Unfortunately these source/target definitions are often hardcoded in the source code of the port so we need to patch anyways. What are your thoughts on this? Regards, Ronald. [-- Attachment #2 --] <html><head></head><body>Hi,<br> <br> I'm looking into the PR "<span id="summary_container"><span id="short_desc_nonedit_display">Mk/bsd.default-versions.mk: update JAVA_DEFAULT to 21".<br> </span></span> <a href="https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272855">https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272855</a><br>; <br> <span><span>Quiet some work involves changing hardcoded -source -target settings to javac. Quite some ports have targets lower than 8 which is not supported by recent javac version.<br> <br> /usr/local/openjdk21/bin/javac --help:</span></span><br> --target <release>, -target <release><br> Generate class files suitable for the specified Java SE release.<br> Supported releases: <br> 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21<br> <br> Openjdk17 supports 7-17 and openjdk25 supports 8-25. Mind that java can read classes going back to version 1. It is just that the javac compiler can't generate them anymore.<br> <br> To make class files usable between ports I think it is user friendly to compile targeted for the oldest JDK in the ports tree which is now openjdk8.<br> Or we can aim to remove the source/target definitions and compile for <span id="summary_container"><span id="short_desc_nonedit_display">JAVA_DEFAULT.</span></span><br> <span><span>Unfortunately these source/target definitions are often hardcoded in the source code of the port so we need to patch anyways.<br> <br> What are your thoughts on this?<br> <br> Regards,<br> Ronald.</span></span><br> </body></html>home | help
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