Build failure when mvn compile

[rloschmann]

I downloaded the source zip (from https://github.com/google/s2-geometry-library-java/archive/refs/heads/master.zip) and then:

1. mvn clean -> OK
2. mvn compile ->

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project s2-geometry-library: Compilation failure: Compilation failure: 
[ERROR] Source option 5 is no longer supported. Use 7 or later.
[ERROR] Target option 5 is no longer supported. Use 7 or later.
[ERROR] -> [Help 1]

Linux system:

• Linux Mint 21.3 Cinnamon
• 5.15.0-142-generic
• Intel© Core™ i7-10850H CPU @ 2.70GHz × 6

OK I found the fix. I added these 2 lines in the properties section of the pom.xml file:
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>

[jmr]

https://maven.apache.org/plugins/maven-compiler-plugin/examples/set-compiler-source-and-target.html says:

If you're are using version 3.13.0 or newer of the Compiler Plugin, use the recommended maven.compiler.release property.)

This is set, so maybe you have an old maven setup.

s2-geometry-library-java/pom.xml

Line 77 in 57151fc

<maven.compiler.release>11</maven.compiler.release>