GCJ compilation problems

Tue Jun 1 10:42:00 GMT 2004

Hi Michael,
Thanks for the reply,
I already have compiled SDK in java with me.. I want to call the Java SDK
from C++.
>gcj -o test test.o test2.o javatest.o

Yes , this works .
But if I have a lot of classes imported(import org.apache.*;) in my
test2.java then do I need to compile all the classes and provide
them..Please find here the code below
++++++++++++++++++++++++++++++++++
import temp.test;
import com.testPrograme.sdk.framework.*;
import com.testPrograme.sdk.exception.*;
import com.testPrograme.sdk.infostore.*;
import com.testPrograme.sdk.security.*;
class test2
{
public void CrAdduser()
{
 System.out.println("Test2 class");
 test t = new test();
 t.func1();
}
}
+++++++++++++++++++++++++++++++++++++++++++
Thanks,
Ranga
+++++++++++++++++++++++++++++++++
-----Original Message-----
From: Michael Koch [mailto:konqueror@gmx.de]
Sent: Tuesday, June 01, 2004 3:50 PM
To: java@gcc.gnu.org
Cc: Ranga Reddy M - CTD ,Chennai.; gnu@gnu.org; gcc@gcc.gnu.org
Subject: Re: GCJ compilation problems
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Am Dienstag, 1. Juni 2004 11:47 schrieb Ranga Reddy M - CTD ,Chennai.:
> Hi ,
>> I do not have much idea about the gcj. I started working on it..
>> Could you please let me know about the compilation procedure for
> the following programs.
>> I am calling java from C++, My C++ programe is here
> and java programs(test2.java) has import * statments....(package is
> test.java).
>>> I am getting the following error if I run the programe as
>> >gcj -o Mytest test2.java javatest.cpp -lstdc++ -lgcj
>> Undefined first referenced
> symbol in file
> temp::test::test() /var/tmp//ccEZC6Eg.o
> temp::test::class$ /var/tmp//ccEZC6Eg.o
> ld: fatal: Symbol referencing errors. No output written to 1
> collect2: ld returned 1 exit status
>> But, this works fine except only one warning
>> >gcj -o Mytest test2.java test.java javatest.cpp -lstdc++ -lgcj

You cant compile C++ code with a Java compiler and you dont need to 
link libgcj (and libstdc++ too) explicitely because they are 
implicitely linked.
Best is to compile each source file to an object file and then link 
all together with gcj.
g++ -c javatest.cpp
gcj -c test2.java
gcj -c test.java
gcj -o test test.o test2.o javatest.o
Thats the easy way most projects to this.
Michael
- -- 
Homepage: http://www.worldforge.org/
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