SourceFile getMainSource() {
        return sourceFile("objc", "main.m", """
            // Simple hello world app
            #import "hello.h"

            int main (int argc, const char * argv[]) {
                doGreeting();
                printf("%d", sum(7, 5));
                return 0;
            }

        """)
    }

    @Override
    SourceFile getLibraryHeader() {

    mainClass = 'org.gradle.sample.Main'
}
// end::mainModule-conf[]

// tag::application-defaultjvmargs[]
application {
    applicationDefaultJvmArgs = ['-Dgreeting.language=en']
}
// end::application-defaultjvmargs[]

// tag::executableDir-conf[]
application {
    executableDir = 'custom_bin_dir'
}
// end::executableDir-conf[]

// tag::distribution-spec[]

    mainClass = "org.gradle.sample.Main"
}
// end::mainModule-conf[]

// tag::application-defaultjvmargs[]
application {
    applicationDefaultJvmArgs = listOf("-Dgreeting.language=en")
}
// end::application-defaultjvmargs[]

// tag::executableDir-conf[]
application {
    executableDir = "custom_bin_dir"
}
// end::executableDir-conf[]

// tag::distribution-spec[]

            applicationDefaultJvmArgs = ["-Dgreeting.language=en", "-DappId=\${project.name - ':'}"]
        }
        """

        when:
        succeeds('startScripts')

        then:
        assertGeneratedUnixStartScript('myApp').text.contains '-Dgreeting.language=en'
        assertGeneratedWindowsStartScript('myApp').text.contains '-Dgreeting.language=en'
    }

            inDirectory('root')
            switch (systemPropertySource) {
                case SystemPropertySource.COMMAND_LINE:
                    return configurationCacheRun('greet', "-Dgreeting=$greeting")
                case SystemPropertySource.GRADLE_PROPERTIES:
                    file('root/gradle.properties').text = "systemProp.greeting=$greeting"
                    return configurationCacheRun('greet')

[source,kotlin]
----
plugins {
    application
}

applicationDefaultJvmArgs = listOf("-Dgreeting.language=en") // Accessing a convention
----
=====
[.multi-language-sample]
=====
.build.gradle
[source,groovy]
----
plugins {
    id 'application'
}

applicationDefaultJvmArgs = ['-Dgreeting.language=en'] // Accessing a convention
----
=====
====