gcj does not compile Hello World

gcj does not compile Hello World

[wadedl]

Dear GNU HELP;

  I built gcc 3.1 using GNU 3.0.4 on my Solaris 2.6 system. I used the
configure flags for GNU as and GNU ld. I do not have dejagnu configured,
but prelim tests demonstrate gcc, g++ and g77 work. When I tried to
compile a simple java program I get the errors shown. The script of my
compile, showing the errors, is:

Script started on Fri Jun 07 08:42:25 2002
gaws20> hostname
gaws20
gaws20> uname -a
SunOS gaws20 5.6 Generic_105181-23 sun4m sparc SUNW,SPARCstation-20
gaws20> date
Fri Jun  7 08:42:32 PDT 2002
gaws20> env | grep CLASS
CLASSPATH=/usr/local/gnu/share/java/libgcj-3.1.jar
gaws20> gcj -o HelloWorld HelloWorld.java
/usr/local/gnu/lib/gcc-lib/sparc-sun-solaris2.6/3.1/crt1.o: In function `.nope':
/usr/local/gnu/lib/gcc-lib/sparc-sun-solaris2.6/3.1/crt1.o(.text+0x5c): undefined reference to `main'
collect2: ld returned 1 exit status
gaws20> exit
gaws20> 
script done on Fri Jun 07 08:42:59 2002


What is going on and how can I fix gcj?

Yours Truly,
David L. Wade

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David L. Wade                                EMail: David.Wade@gat.com
Senior Systems Programmer Analyst                     Ph. 858-455-3342
General Atomics                                       Fx. 858-455-2692
3550 General Atomics Court                San Diego, California  92121     
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opinions, conclusions, or recommendations expressed above are my own
and do not necessarily represent the views of my employer.

Re: gcj does not compile Hello World

[Michael Still]

On Fri, 7 Jun 2002 wadedl@gat.com wrote:

> gaws20> gcj -o HelloWorld HelloWorld.java
> /usr/local/gnu/lib/gcc-lib/sparc-sun-solaris2.6/3.1/crt1.o: In function `.nope':
> /usr/local/gnu/lib/gcc-lib/sparc-sun-solaris2.6/3.1/crt1.o(.text+0x5c): undefined reference to `main'
> collect2: ld returned 1 exit status

What does the source for your Java program look like?

Mikal

-- 

Michael Still (mikal@stillhq.com)     UMT+10hrs

Re: gcj does not compile Hello World

[Bjoern Olav Ringstad]

Hi

When you compile a java program with gcj you have to create a .class file with
gcc -C HelloWorld.java (capital c) and run it with a JVM.
If you need to, you can create a native executable with gcj, then you have to specify
the class that holds the main method like this: gcj -o HelloWorld HelloWorld.java --main=MyClass

--

Bjørn Olav Ringstad (bjornor@stud.cs.uit.no)


> On Fri, 7 Jun 2002 wadedl@gat.com wrote:
> 
> > gaws20> gcj -o HelloWorld HelloWorld.java
> > /usr/local/gnu/lib/gcc-lib/sparc-sun-solaris2.6/3.1/crt1.o: In function `.nope':
> > /usr/local/gnu/lib/gcc-lib/sparc-sun-solaris2.6/3.1/crt1.o(.text+0x5c): undefined reference to `main'
> > collect2: ld returned 1 exit status