Re: Java-related Bison tests all fail

[Joel E. Denny]

On Sat, 10 Feb 2007, Bruno Haible wrote:

> Might be an installation problem with your gij or gcj. What does the
> following Java program print if you compile it with gcj -C and run it with
> gij?
> 
> ============================= conftestver.java =============================
> public class conftestver {
>   public static void main (String[] args) {
>     System.out.println(System.getProperty("java.specification.version"));
>   }
> }
> ============================================================================

It prints:

  1.4

As far as I can tell, conftestver.class is created by an echo in 
javacomp.m4.  When using gt_JAVACOMP([1.3]) in configure.ac, this passage 
appears in config.log:

  configure:18697: checking for Java virtual machine
  configure:18747: found /usr/local/bin/gij
  configure:18781: found /usr/lib/java/bin/java
  configure:18904: result: gij
  configure:18957: CLASSPATH=. gij conftestver
  Exception in thread "main" java.lang.ClassFormatError: conftestver (bad magic 
number)
     at java.lang.VMClassLoader.defineClass (natVMClassLoader.cc:77)
     at java.lang.ClassLoader.defineClass (ClassLoader.java:449)
     at java.security.SecureClassLoader.defineClass (SecureClassLoader.java:108)
     at java.net.URLClassLoader.findClass (URLClassLoader.java:1166)
     at java.lang.ClassLoader.loadClass (ClassLoader.java:317)
     at java.lang.ClassLoader.loadClass (ClassLoader.java:260)
     at java.lang.Class.forName (natClass.cc:88)
     at gnu.java.lang.MainThread.run (MainThread.java:95)
  configure:18964: WARNING: unknown target-version , please update gt_JAVACOMP 
macro
  configure:19009: checking for Java compiler
  configure:19215: found /usr/local/bin/gcj
  configure:19302: gcj -C -d . conftestlib.java
  configure:19484: result: no
  configure:19495: checking for Java virtual machine
  configure:19702: result: gij