How can I pass -h argument to maven compiler plugin to create JNI header files

Question

I already tried passing this argument in the pom but it does not recognize it. Since jdk 8 we dont have to manually run javah to generate header files rather we can pass -h argument to javac and generate the header files when compiling. So if I can pass "-h dir" to maven compiler plugin I can generate the header files when I run mvn compile

<plugin>
      <artifactId>maven-compiler-plugin</artifactId>
      <version>3.7.0</version>
      <configuration>
        <compilerArgs>
          <arg>-verbose</arg>
          <arg>-h .</arg>
        </compilerArgs>
      </configuration>
</plugin>

But when I run mvn install I get this

[INFO] BUILD FAILURE

[INFO] ------------------------------------------------------------------------

[INFO] Total time: 2.936 s

[INFO] Finished at: 2018-11-07T14:52:49+05:30

[INFO] Final Memory: 9M/155M

[INFO]------------------------------------------------------------------------

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.7.0:compile (default-compile) on project adiesha-native: Fatal error compiling: invalid flag: -h . -> [Help 1]

Is there any other way to do this with maven or do i have to manually create them using "javac -h dir"

Any help would be greatly appreciated

Answer 1

I was have the same error "invalid flag: -h target/headers" with my maven build.

I tried the suggestion from Gyro Gearless above. I separated my original '-h target/headers' into '-h and 'target/headers'. That resolved my issue. Now all jni headers within my project are generated correctly and placed within target/headers.

Here is the entire compiler plugin config section from my pom.xml:

        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.7.0</version>
            <configuration>
                <compilerArgs>
                    <arg>-h</arg>
                    <arg>target/headers</arg>
                 </compilerArgs>
                <source>11</source>
                <target>11</target>
            </configuration>
        </plugin>

With this pom, the command 'mvn compile' was enough to generate JNI headers. Note that 'mvn clean' will not remove previously generated headers.