CODEWITHSUNDEEP
javagradlegraalvmgraalvm-native-imagepicocli
Eddie Greathouse
Eddie Greathouse

Reputation: 185

Graal native-image command returns error "Please specify class containing the main entry point method"

My application that is built with gradle is not able to be packaged with graal's native image command.

I build the combined jar using:

gradlew --no-daemon assemble

Then, I test my cli application using:

java -jar build/libs/stackoverflow-cli-0.1-all.jar search -q "merge maps" -t java

The output is what I expected, so that's good. However, I then want to create the native binary using graalvm. So I run this command:

native-image --no-server -cp build/libs/stackoverflow-cli-0.1-all.jar

It immediately fails with the following error:

Warning: Ignoring server-mode native-image argument --no-server.
Error: Please specify class containing the main entry point method. (see --help)

I thought this was weird. The next thing I tried was to specify the main class as the error suggested:

native-image --no-server -cp build/libs/stackoverflow-cli-0.1-all.jar com.eddie.StackoverflowCliCommand

That gives me a different error:

Warning: Ignoring server-mode native-image argument --no-server.
[com.ivansinsurance.stackoverflowclicommand:1544]    classlist:   3,060.25 ms,  0.96 GB
[com.ivansinsurance.stackoverflowclicommand:1544]        setup:     809.46 ms,  0.96 GB
Error: Default native-compiler executable 'cl.exe' not found via environment variable PATH
Error: Use -H:+ReportExceptionStackTraces to print stacktrace of underlying exception
Error: Image build request failed with exit status 1

I don't know what this error means. Here is the version of java I'm using:

openjdk version "11.0.7" 2020-04-14
OpenJDK Runtime Environment GraalVM CE 20.1.0 (build 11.0.7+10-jvmci-20.1-b02)
OpenJDK 64-Bit Server VM GraalVM CE 20.1.0 (build 11.0.7+10-jvmci-20.1-b02, mixed mode, sharing)

Any help is greatly appreciated!

Upvotes: 5

Views: 7428

Answers (1)

Eddie Greathouse
Eddie Greathouse

Reputation: 185

  1. I installed Visual Studio 2019.

  2. Then I launched x64 Native Tools Command Prompt for VS 2019

  3. Then I ran:

    'native-image --no-server -cp build/libs/stackoverflow-cli-0.1-all.jar com.eddie.StackoverflowCliCommand'

and that worked!

Upvotes: 4

Related Questions