Re: Problem linking java program

[Mark Wielaard <mark at klomp dot org>]

On Thu, 2005-11-10 at 14:06 +0100, Julien Claassen wrote:
> Hello all!
>   I wanted to compile a helloworld program with selfcompiled gcc-3.4.3 (see
> below for more info). It had linking problems. Compile only works fine.
>   The program was:
> // Begin of Test.java
> 
> import java.lang.*;
> 
> class Test
> {
> 	public static void main(String args[])
> 	{
> 		System.out.println("Hello world.\n");
> 	}
> };
> 
> // EOF
>   The gcj call and output was:
> gcj Test.java
> 
> /usr/lib/crt1.o: In function `_start':
> /usr/lib/crt1.o(.text+0x18): undefined reference to `main'
> collect2: ld returned 1 exit status

When generating an executable you need it to tell which class is the
main class: gcj --main=Test Test.java
The resulting a.out executable will then start executing your program
using Test.main().

See also http://gcc.gnu.org/onlinedocs/gcj/Linking.html#Linking

Cheers,

Mark

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