Bug 180378 – dev-java/rxtx missing component

• Product: Gentoo Linux
• Status: RESOLVED INVALID

[Description James Horton 2007-05-30 18:46:31 UTC]

Trying to use dev-java/rxtx in the simpliest form. It emerged OK.
Using a published example from:
http://rxtx.qbang.org/wiki/index.php/Two_way_communcation_with_the_serial_port


and the guide from:
http://www.gentoo.org/doc/en/java.xml

Reproducible: Always

Steps to Reproduce:
1.Using a published example from:
http://rxtx.qbang.org/wiki/index.php/Two_way_communcation_with_the_serial_port

2.follow:
http://www.gentoo.org/doc/en/java.xml

3. This erroneous result:

java TwoWaySerialComm
java.lang.UnsatisfiedLinkError: no rxtxSerial in java.library.path thrown while loading gnu.io.RXTXCommDriver
Exception in thread "main" java.lang.UnsatisfiedLinkError: no rxtxSerial in java.library.path
        at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1517)
        at java.lang.Runtime.loadLibrary0(Runtime.java:788)
        at java.lang.System.loadLibrary(System.java:834)
        at gnu.io.CommPortIdentifier.<clinit>(CommPortIdentifier.java:83)
        at TwoWaySerialComm.connect(TwoWaySerialComm.java:20)
        at TwoWaySerialComm.main(TwoWaySerialComm.java:107)



Actual Results:  
java TwoWaySerialComm
java.lang.UnsatisfiedLinkError: no rxtxSerial in java.library.path thrown while loading gnu.io.RXTXCommDriver
Exception in thread "main" java.lang.UnsatisfiedLinkError: no rxtxSerial in java.library.path
        at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1517)
        at java.lang.Runtime.loadLibrary0(Runtime.java:788)
        at java.lang.System.loadLibrary(System.java:834)
        at gnu.io.CommPortIdentifier.<clinit>(CommPortIdentifier.java:83)
        at TwoWaySerialComm.connect(TwoWaySerialComm.java:20)
        at TwoWaySerialComm.main(TwoWaySerialComm.java:107)



 I think the Gentoo documetation is not in sync with the new
way Java is set upon Gentoo. I'm fairly new to Java, so 
it could easily be my mistake (not reading between the lines
of the docs).....


James

[Comment 1 Petteri Räty (RETIRED) 2007-06-05 21:42:58 UTC]

Loading native libraries is done like this:
betelgeuse@pena /usr/portage/dev-java/jscience $ echo -Djava.library.path=$(java-config -di rxtx-2)
-Djava.library.path=/usr/lib/rxtx-2

so just call java with that argument and it should work. If not please reopen.

[Comment 2 Petteri Räty (RETIRED) 2007-06-05 21:43:45 UTC]

Also feel free to ask for help for issues like this either on the gentoo-java mailing list or the #gentoo-java IRC channel on Freenode.