Link problem when working with array and Object

[Andrew Haley]

> Date: Mon, 6 Sep 1999 13:26:44 -0700 (PDT)
> From: Anthony Green <green@cygnus.com>
> 
> Eric wrote:
> >   javac Pepe.java      (OK)
> 
> You can use `gcj -C' in place of javac here.
> 
> > func__4PepePQ34java4lang6ObjectPt6JArray1ZiN21 (signatute of fun in Pepe.o)
> > func__4PepePQ34java4lang6ObjectPt6JArray1ZiT1T1 (signature of fun in
> > PepeImp.o)
> 
> I was able to reproduce this bug.  Could you please file a bug report?

We've seen this before: see the mail below.  I tracked it down to a
bug in the C++ name mangling code.  It turns out that the Java and C++
name mangling use totally different routines.

What I want to do is unify the C++ and Java name mangling code so that
it will be consistent across languages.  The best way to do that is to
put mangling into a common library.  The C++ guys might agree to this.

Andrew.


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Date: Mon, 28 Jun 1999 09:28:24 -0700
From: Tom Tromey <tromey@cygnus.com>
To: Simon Gornall <simon@unique-id.com>
Cc: java discuss <java-discuss@sourceware.cygnus.com>
Subject: Re: Arguments to native functions (?) [a bit long]
In-Reply-To: <37779637.F13124E1@unique-id.com>
References: <37779637.F13124E1@unique-id.com>
X-Zippy:  ..  the MYSTERIANS are in here with my CORDUROY SOAP DISH!!
X-Attribution:  Tom

>>>>> "Simon" == Simon Gornall <simon@unique-id.com> writes:

Simon> Anyway, if I call a native function with more than 3 arguments
Simon> I get a compile-time error saying the linker can't find the
Simon> native function.

I see this too.  (And, Andrew, using -fvtable-thunks doesn't help.)

Here is what I see when I run nm on your failing test (modified to
have 4 arguments and not 5):

    creche. nm nTest.o | grep calltest
    00000000 T calltest__4testPQ34java4lang6StringiT1T1
    creche. nm test.o | grep calltest
    00000096 d _Utf7calltest
             U calltest__4testPQ34java4lang6StringiN21

To me it looks like there is some kind of bug in name mangling.

Tom