Following build directions lead to "libusb.home" is required for this build error.

[AbbottWC]

Running WINDOWS 7 but ran into same problem on Ubuntu 14.0.4

Very possible given my limited experience with these sorts of things that I am doing something very wrong.

I was trying to build the LibUSB directory using the suggestion you gave but it didn't work. I downloaded the LibUSB latest GIT from https://github.com/libusb/libusb and placed it in the javax-usb-libusb1-master/libusb-git folder, and then changed over to the javax-usb-libusb1-master/libusb directory and ran mvn install.

Before when I tried this I received a great deal of information about things being downloaded and ultimately ended up in failure.

This time when I tried it after having GITten the latest LibUSB build and placed it into the libusb-git directory, there was less information, but it still ended with the same error:

Y:\Development Tools\Java\javax-usb-libusb1-master\libusb>mvn install
[INFO] Scanning for projects...
[INFO]
[INFO] Using the builder org.apache.maven.lifecycle.internal.builder.singlethrea
ded.SingleThreadedBuilder with a thread count of 1
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Javalibusb1 :: libusb 1.0.1-1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-enforcer-plugin:1.0:enforce (enforce-maven) @ libusb ---
[WARNING] Rule 1: org.apache.maven.plugins.enforcer.RequireProperty failed with
message:
Property "libusb.home" is required for this build.
[WARNING] Rule 2: org.apache.maven.plugins.enforcer.RequireProperty failed with
message:
Property "libusb.cflags" is required for this build.
[WARNING] Rule 3: org.apache.maven.plugins.enforcer.RequireProperty failed with
message:
Property "libusb.configure.args" is required for this build.
[WARNING] Rule 4: org.apache.maven.plugins.enforcer.RequireProperty failed with
message:
Property "nar.optionSet.c" is required for this build.
[WARNING] Rule 5: org.apache.maven.plugins.enforcer.RequireProperty failed with
message:
Property "nar.optionSet.linker" is required for this build.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.302 s
[INFO] Finished at: 2014-06-06T10:51:48-06:00
[INFO] Final Memory: 7M/112M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-enforcer-plugin:1.
0:enforce (enforce-maven) on project libusb: Some Enforcer rules have failed. Lo
ok above for specific messages explaining why the rule failed. -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e swit
ch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please rea
d the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionE
xception

Nothing I searched for could bring me an answer to this problem, and I don't really think it is an issue, but I was hoping to get some answers, and maybe it is an issue, I don't know, and if it's not, sorry for wasting your time.

[trygvis]

You need to add the stuff in the "Building" section to your settings.xml too.

[trygvis]

Btw, I've never tried to build this on windows so I have no idea if it'll really work. But it kinda should :)

[AbbottWC]

Thank you very much for your timely response. i will try that and if it works will post promptly.

[AbbottWC]

Where do I find/create the settings.xml file?

[trygvis]

https://github.com/trygvis/javax-usb-libusb1#building

[AbbottWC]

I saw that but in what directory inside the project directory do I place the settings.xml file? Sorry, should have been more clear.

[AbbottWC]

Following directions I was able to (finally) compile the LibUSB from git and was able to overcome the preceding error however there is now a new error:
Failed to execute goal on project javalibusb1: Could not resolve dependencies for project io.trygvis.usb:javalibusb1:nar:1.0.1-1-SNAPSHOT: Failure to find io.trygvis.usb:libusb:pom:1.0.1-1

Why would this be happening?

[Wouter1]

Same problem here, OSX mavericks 10.9.4. Downloaded your latest version 6c85311.

I am following the 'Building' instructions as on https://github.com/trygvis/javax-usb-libusb1

To build the main software a mvn install will be sufficient.

so I run 'mvn install' in top level of the package. Gives BUILD FAILURE. I only see this warning and the message

[WARNING] Rule 1: org.apache.maven.plugins.enforcer.RequireProperty failed with message:
Property "libusb.home" is required for this build.

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-enforcer-plugin:1.0:enforce (enforce-maven) on project javax-usb-libusb1: Some Enforcer rules have failed. Look above for specific messages explaining why the rule failed. -> [Help 1]

Then I read on

If you want to make life easy for you, you want build and use the libusb referenced from as a git module too. To do that simply run (cd libusb; mvn install). Like with the javalibusb1 library, the build is set to build 64-bit versions if the JVM is running in 64-bit mode.

Bit puzzling. Of course I want it easy as a starter. So do I need to do this? I already did install on top level?

Anyway, just to see what happens, I execute cd libusb; mvn install

Gives me EXACTLY the above warning and error.

Check, yes I have 64 bit java and I want 64 bit which is the default anyway.

java -version
java version "1.7.0_67"
Java(TM) SE Runtime Environment (build 1.7.0_67-b01)
Java HotSpot(TM) 64-Bit Server VM (build 24.65-b04, mixed mode)

Reading on...

If you do not use the referenced libusb module, you have to build it manually and point libusb.home to it.

But I DO want to use the referenced libusb module. So I think I should skip this section.

[Wouter1]

Tried some more. My guess is that the C code has to be built first.

building the c/ directory 'make all' jus tgives me errors

make all

Makefile:1: ../javalibusb1/Makefile.local.Darwin: No such file or directory

Makefile:2: ../javalibusb1/Makefile.Darwin: No such file or directory

make: *** No rule to make target `../javalibusb1/Makefile.Darwin'. Stop.

Then trying the other C code, in javalibusb1/ subdirectory

mvn package there gives

[WARNING] The POM for io.trygvis.usb:libusb:pom:1.0.1-1-SNAPSHOT is missing, no dependency information available Downloading: https://oss.sonatype.org/content/repositories/snapshots/io/trygvis/usb/javax.usb/1.0.1-1-SNAPSHOT/javax.usb-1.0.1-1-SNAPSHOT.jar

[Wouter1]

It seems something is missing on the sonartype repository.

Check https://oss.sonatype.org/content/repositories/snapshots/io/trygvis/

You can see that there is no USB directory there.

[Wouter1]

I also tried to compile libusb myself. But it seems broken, it does not even build. I filed a bug report there.

[Wouter1]

After a full day of messing with libusb and javax-usb-libusb1 I finally got it all compiling and running.
I will report all the fixes that I did, I suppose these can be fixed here

I'm running on the latest libusb . I finally got it compiled...

Then, you need to put this settings file in $HOME/.m2

<settings>
  <profiles>
    <profile>
      <id>libusb-32</id>
      <activation>
        <os>
          <arch>i386</arch>
        </os>
      </activation>
      <properties>
        <libusb.home>/usr/local</libusb.home>
        <libusb.cflags>-m32</libusb.cflags>
      </properties>
    </profile>
    <profile>
      <id>libusb-64</id>
      <activation>
        <os>
          <arch>x86_64</arch>
        </os>
      </activation>
      <properties>
        <libusb.home>/usr/local</libusb.home>
        <libusb.cflags>-m64</libusb.cflags>
      </properties>
    </profile>
  </profiles>
</settings>

Then, the pom files need to be fixed, to use the official nar-maven-plugin
The pom also needs to get a -c option for the c compiler, otherwise (at least on OSX) it fails because it can not resolve all symbols. You need the -c option to postpone the linking to the linker... I'm not sure how compatible the '-c' is, I was expecting some other option for the plugin but could not find it. The linkCPP=false only prevents linking against c++ libraries, and that is not enough.

Then, the actual library name as it is now is "libusb.h", so you need to add #include "libusb.h"
in both javalibusb.c and usbw.c.

A number of places in javalibusb do not initialize variables, causing errors and warnings. I set err=0 and transferred=0 initially. Seems to work. No idea if that is what is intended. But at least it compiles.

In usbw.c, the function libusb_get_speed has been renamed to libusb_get_device_speed.

I noticed that the original script also loads some poms in my .m2 directory without loading the associated jars. That caused some more erorrs , some compiler tried to open the expected jar which wasn't there and then you got a confusing "failed to open zip file" or something...

My pom now looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>io.trygvis.usb</groupId>
    <artifactId>javax-usb-libusb1</artifactId>
    <version>1.0.1-1-SNAPSHOT</version>
  </parent>
  <artifactId>javalibusb1</artifactId>
  <name>Javalibusb1 :: Implementation and JNI Wrapper</name>
  <packaging>nar</packaging>
  <dependencies>
    <dependency>
      <groupId>io.trygvis.usb</groupId>
      <artifactId>javax.usb</artifactId>
      <version>${project.version}</version>
    </dependency>
    <!--     <dependency>
      <groupId>io.trygvis.usb</groupId>
      <artifactId>libusb</artifactId>
      <version>${project.version}</version>
      <type>pom</type>
    </dependency> -->

  </dependencies>
  <build>
    <plugins>
      <plugin>
        <groupId>com.github.maven-nar</groupId>
        <artifactId>nar-maven-plugin</artifactId>
        <version>3.1.0</version>
                <extensions>true</extensions>
        <configuration>
          <libraries>
            <library>
              <type>jni</type>
              <linkCPP>false</linkCPP>
              <narSystemPackage>javalibusb1</narSystemPackage>
            </library>
          </libraries>
          <c>
            <optionSet>${nar.optionSet.c} -c</optionSet>
            <clearDefaultOptions>true</clearDefaultOptions>
            <includePaths>
              <includePath>${libusb.home}/include/libusb-1.0</includePath>
              <includePath>${basedir}/src/main/include</includePath>
            </includePaths>
          </c>
          <linker>
            <optionSet>${nar.optionSet.linker}</optionSet>
            <clearDefaultOptions>true</clearDefaultOptions>
            <libs>
              <lib>
                <name>usb-1.0</name>
                <type>static</type>
                <directory>${libusb.home}/lib</directory>
              </lib>
            </libs>
          </linker>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

I didn't put the modified c files here, too much text and only a few small changes.

Hope tht this all helps!