No documentation that launch4j cannot run on pure 64-bit linux

[TheLQ]

When running on Ubuntu 16.04 x64 or Debian Stretch x64 without the libc6:i386 package I get this

net.sf.launch4j.BuilderException: net.sf.launch4j.ExecException: java.io.IOException: Cannot run program "/home/lordquackstar/.m2/repository/net/sf/launch4j/launch4j/3.8.0/launch4j-3.8.0-workdir-linux/bin/windres": error=2, No such file or directory
    at net.sf.launch4j.Builder.build(Builder.java:146)
    at com.akathist.maven.plugins.launch4j.Launch4jMojo.execute(Launch4jMojo.java:336)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: net.sf.launch4j.ExecException: java.io.IOException: Cannot run program "/home/lordquackstar/.m2/repository/net/sf/launch4j/launch4j/3.8.0/launch4j-3.8.0-workdir-linux/bin/windres": error=2, No such file or directory
    at net.sf.launch4j.Util.exec(Util.java:160)
    at net.sf.launch4j.Cmd.exec(Builder.java:212)
    at net.sf.launch4j.Builder.build(Builder.java:96)
    ... 22 more
Caused by: java.io.IOException: Cannot run program "/home/lordquackstar/.m2/repository/net/sf/launch4j/launch4j/3.8.0/launch4j-3.8.0-workdir-linux/bin/windres": error=2, No such file or directory
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
    at java.lang.Runtime.exec(Runtime.java:620)
    at java.lang.Runtime.exec(Runtime.java:485)
    at net.sf.launch4j.Util.exec(Util.java:128)
    ... 24 more
Caused by: java.io.IOException: error=2, No such file or directory
    at java.lang.UNIXProcess.forkAndExec(Native Method)
    at java.lang.UNIXProcess.<init>(UNIXProcess.java:248)
    at java.lang.ProcessImpl.start(ProcessImpl.java:134)
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
    ... 27 more

This file exists, but file shows why it won't run on my machine, even when directly executed in bash

$ file /home/lordquackstar/.m2/repository/net/sf/launch4j/launch4j/3.8.0/launch4j-3.8.0-workdir-linux/bin/windres
/home/lordquackstar/.m2/repository/net/sf/launch4j/launch4j/3.8.0/launch4j-3.8.0-workdir-linux/bin/windres: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 2.6.15, BuildID[sha1]=648677129832e944d54fa362bbb6e6e4b75015fd, stripped

This is unexpected behavior as none of the documentation, readme, maven plugin logs, nor the exception mention that 64-bit OS's are unsupported. As not all 64-bit systems are multi-arch and it is not always desirable to run a multi-arch system this should be made very clear in the README and in the stack trace or logs.

There could also be an additional paragraph explaining why this isn't possible: mingw is 32-bit only and mingw-w64 doesn't seem to have a winres executable

[lukaszlenart]

Please take a look on this issue #4 - after installing those missed libs everything should be ok. I will a section to FAQ.