desruisseaux commented on PR #1062:
URL:
https://github.com/apache/maven-compiler-plugin/pull/1062#issuecomment-4649195427
Actually the section saying that we need to run `javac` twice could be
updated. It should not be needed any more since the addition of the
multi-release support, although we would need to test for making sure. But in
principle, a configuration like below should work with Java 8, with the
`module-info.java` file in the `src/main/java_9` directory:
```xml
<sources>
<source>
<directory>src/main/java</directory>
<targetVersion>8</targetVersion>
</source>
<source>
<directory>src/main/java_9</directory>
<targetVersion>9</targetVersion>
</source>
</sources>
```
We could amend the pull request so that instead of being "two compilations
versus one compilation", make it "explicit module-info versus module-info
derived from the pom.xml". We may need to test the above snippet first for
making sure that it works in this context too.
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