# Help needed in building xruby (for java newbie) **URL:** \ **Category:** Ruby\ **Created:** [June 18, 2007, 12:37pm UTC](https://www.ruby-forum.com/t/help-needed-in-building-xruby-for-java-newbie/107122 "2007-06-18T12:37:40Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Axel\_E](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/7c8e57/32.png) [@Axel\_E](https://www.ruby-forum.com/u/Axel_E)\ **Post date:** [June 18, 2007, 12:37pm UTC](https://www.ruby-forum.com/t/help-needed-in-building-xruby-for-java-newbie/107122/1 "2007-06-18T12:37:40Z")
Dear all, when trying to build xruby for Linux i586, OpenSuSE 10.2, I get the following errors: dhcppc1:/usr/local/xruby # export JAVA\_HOME=/usr dhcppc1:/usr/local/xruby # which javac /usr/bin/javac dhcppc1:/usr/local/xruby # javac -version javac 1.5.0\_10 dhcppc1:/usr/local/xruby # sh build.sh Buildfile: build.xml parser: treeparser: compile: [javac] Compiling 273 source files to /usr/local/xruby/build BUILD FAILED /usr/local/xruby/build.xml:59: Unable to find a javac compiler; com.sun.tools.javac.Main is not on the classpath. Perhaps JAVA\_HOME does not point to the JDK Total time: 0 seconds How could I tell the build script where to look for javac - if this is the real problem here? Thank you very much, Best regards Axel ---
**Author:** ![Axel\_E](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/7c8e57/32.png) [@Axel\_E](https://www.ruby-forum.com/u/Axel_E)\ **Post date:** [June 18, 2007, 10:31pm UTC](https://www.ruby-forum.com/t/help-needed-in-building-xruby-for-java-newbie/107122/2 "2007-06-18T22:31:18Z")
Axel E. wrote: > /usr/local/xruby/build.xml:59: Unable to find a javac compiler; > com.sun.tools.javac.Main is not on the classpath. > Perhaps JAVA\_HOME does not point to the JDK Hi Axel. Looks like you need to add the directory containing javac to your PATH. In teh example below I did a find to get that, then modified the path. quicksilver:~ dougal$ sudo find / -name javac /usr/bin/javac quicksilver:~ dougal$ export PATH=/usr/bin:$PATH Obviously this example is a little silly, as /usr/bin will always be in your path (On OS X anyway), but on your system it may be located differently. In sumary… 1 - Find where javac and friends live. 2 - Add the directory to your PATH. 3 - Run your compilation. Hope this helps. D. > **[Douglas F Shearer](https://douglasfshearer.com/)** > > Software developer, mountainbiker. ---
**Author:** ![Axel\_E](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/7c8e57/32.png) [@Axel\_E](https://www.ruby-forum.com/u/Axel_E)\ **Post date:** [June 19, 2007, 3:19pm UTC](https://www.ruby-forum.com/t/help-needed-in-building-xruby-for-java-newbie/107122/3 "2007-06-19T15:19:49Z")
Dear Douglas, thank you for responding. I actually verified that javac is on my system, and can be found by the system to compile a “Hello-World” program in java. So I don’t think that the $JAVA\_HOME variable is the problem here anymore, but I am a java newbie, so I don’t understand what could be wrong otherwise… Please, Java experts, help me again… Best regards, Axel -------- Original-Nachricht -------- Datum: Tue, 19 Jun 2007 05:31:29 +0900 Von: Douglas S. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) An: removed\_email\_address@domain.invalid Betreff: Re: Help needed in building xruby (for java newbie)