Re: gcj exception compiling

[Philipp Kraus <philipp dot kraus at flashpixx dot de>]

On 2011-11-06 02:28:12 +0100, Yaakov (Cygwin/X) said:

> On Sat, 2011-11-05 at 19:13 +0100, Kraus Philipp wrote:
> > Hello,
> >
> > I try to build a Java class with the gcj under Cygwin. I get this error 
> > message:
> >
> > Exception in thread "main" java.lang.NoClassDefFoundError: 
> > org.eclipse.jdt.inter
> > nal.compiler.batch.GCCMain
> > at gnu.java.lang.MainThread.run(Unknown Source)
> > Caused by: java.lang.ClassNotFoundException: 
> > org.eclipse.jdt.internal.compiler.b
> > atch.GCCMain not found in gnu.gcj.runtime.SystemClassLoader{urls=[], 
> > parent=gnu.
> > gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}
> > at java.net.URLClassLoader.findClass(Unknown Source)
> > at java.lang.ClassLoader.loadClass(Unknown Source)
> > at java.lang.ClassLoader.loadClass(Unknown Source)
> > at gnu.java.lang.MainThread.run(Unknown Source)
>
> You're missing the ECJ jar.  Either download
> ftp://sourceware.org/pub/java/ecj-4.5.jar and install it
> to /usr/share/java/ecj.jar or install java-ecj from Cygwin Ports.

Thanks, but under /usr/sbin/ should be a script like download_ecj.sh
for downloading and installing, but in my Cygwin version the script
does not exists

> > The class does not have any main function.
> > On the default gcj installation, it creates this error first:
> >
> > /usr/lib/gcc/i686-pc-cygwin/4.5.3/ecj1.exe: error while loading shared 
> > libraries
> > : cyggcj-11.dll: cannot open shared object file: No such file or directory
> >
> > So I install the gcj-11 library, the setup installs gcj-9 on default.
> >
> > How can I create a working installation?
>
> Install libgcj11.
>
> (P.S. Dave Korn: I took the liberty of fixing this on sourceware.)

If I try to compile a java code with "gcj mysource.java" I get the error:

/usr/lib/gcc/i686-pc-cygwin/4.5.3/../../../libcygwin.a(libcmain.o):(.text+0xa9): 

undefined reference to `_WinMain@16'
collect2: ld returned 1 exit status

How can I solve the linker problem? (I have installed the newest 
version of Cygwin)

Thanks
Phil



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