Gnu Compiler for Java compiling

Gnu Compiler for Java compiling

[Me Myself and I]

I have just gone through the install with internet download using
the latest cygwin windows installer,
on my 64 bit Microsoft Windows 7.  I assume that I've only gotten
32 bit software, which is not my issue.

I am trying to compile my first java program,

gcj Program.java --main=Program -o Program.exe

and I find that I only get the errror message:

Exception in thread "main" java.lang.NoClassDefFoundError: org.eclipse.jdt.internal.compiler.batch.GCCMain
   at gnu.java.lang.MainThread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.eclipse.jdt.internal.compiler.batch.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)

Has there been a corrupted installation or download?  Should I just

reinstall cygwin from the start?  Or is there something simple I should do?
 		 	   		  

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Re: Gnu Compiler for Java compiling

[David Rothenberger]

On 4/2/2012 1:48 AM, Me Myself and I wrote:
> I have just gone through the install with internet download using
> the latest cygwin windows installer,
> on my 64 bit Microsoft Windows 7.  I assume that I've only gotten
> 32 bit software, which is not my issue.
> 
> I am trying to compile my first java program,
> 
> gcj Program.java --main=Program -o Program.exe
> 
> and I find that I only get the errror message:
> 
> Exception in thread "main" java.lang.NoClassDefFoundError: org.eclipse.jdt.internal.compiler.batch.GCCMain

Check /usr/share/doc/Cygwin/gcc4.README, specifically the section "Java
users need an additional download to compile source to bytecode."

I was not able to find the "download_ecj.sh" script mentioned there, but
downloading the ECJ jar file solved the problem for me.

-- 
David Rothenberger  ----  daveroth@acm.org

O'Toole's commentary on Murphy's Law:
        Murphy was an optimist.

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Re: Gnu Compiler for Java compiling

[marco atzeri]

On 4/2/2012 8:14 PM, David Rothenberger wrote:
> On 4/2/2012 1:48 AM, Me Myself and I wrote:
>> I have just gone through the install with internet download using
>> the latest cygwin windows installer,
>> on my 64 bit Microsoft Windows 7.  I assume that I've only gotten
>> 32 bit software, which is not my issue.
>>
>> I am trying to compile my first java program,
>>
>> gcj Program.java --main=Program -o Program.exe
>>
>> and I find that I only get the errror message:
>>
>> Exception in thread "main" java.lang.NoClassDefFoundError: org.eclipse.jdt.internal.compiler.batch.GCCMain
>
> Check /usr/share/doc/Cygwin/gcc4.README, specifically the section "Java
> users need an additional download to compile source to bytecode."
>
> I was not able to find the "download_ecj.sh" script mentioned there, but
> downloading the ECJ jar file solved the problem for me.
>

use the search

http://cygwin.com/cgi-bin2/package-cat.cgi?file=gcc4-java%2Fgcc4-java-4.3.4-4&grep=download_ecj.sh

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Re: Gnu Compiler for Java compiling

[David Rothenberger]

On 4/2/2012 11:42 AM, marco atzeri wrote:
> On 4/2/2012 8:14 PM, David Rothenberger wrote:
>> On 4/2/2012 1:48 AM, Me Myself and I wrote:
>>> I have just gone through the install with internet download using
>>> the latest cygwin windows installer,
>>> on my 64 bit Microsoft Windows 7.  I assume that I've only gotten
>>> 32 bit software, which is not my issue.
>>>
>>> I am trying to compile my first java program,
>>>
>>> gcj Program.java --main=Program -o Program.exe
>>>
>>> and I find that I only get the errror message:
>>>
>>> Exception in thread "main" java.lang.NoClassDefFoundError:
>>> org.eclipse.jdt.internal.compiler.batch.GCCMain
>>
>> Check /usr/share/doc/Cygwin/gcc4.README, specifically the section "Java
>> users need an additional download to compile source to bytecode."
>>
>> I was not able to find the "download_ecj.sh" script mentioned there, but
>> downloading the ECJ jar file solved the problem for me.
>>
> use the search
> 
> http://cygwin.com/cgi-bin2/package-cat.cgi?file=gcc4-java%2Fgcc4-java-4.3.4-4&grep=download_ecj.sh

It's not part of the most recent gcc4-java package.

515 ~> cygcheck -cd gcc4-java
Cygwin Package Information
Package              Version
gcc4-java            4.5.3-3

516 ~> cygcheck -l gcc4-java | grep download

517 ~> ls -l /usr/sbin/download*
/bin/ls: cannot access /usr/sbin/download*: No such file or directory


-- 
David Rothenberger  ----  daveroth@acm.org

Jones' Second Law:
        The man who smiles when things go wrong has thought of someone
        to blame it on.

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