Date: Thu, 24 Nov 1994 23:07:48 GMT
From: drm AT myob DOT demon DOT co DOT uk (David Monksfield)
Reply-To: drm AT myob DOT demon DOT co DOT uk
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: can't get objective-c to link
Lines: 78


A newbie question: I wonder if anyone can help?

I have DJGPP 1.12m2.  I have been trying, with no success, to use it to
compile Objective-C. This is what happens when I try to compile and link
my trivial program:

C:\> gcc -c eg1.m
C:\> gcc -o eg1 eg1.o -lobjc
eg1.m(.ctor+0x0): undefined reference to `global constructors keyed to main'
object.m(.ctor+0x0): undefined reference to `global constructors keyed to
object.m'

I get a similar result for all Obj-C examples I have tried.  Test 16
fails for the same reason.  All the other tests pass, and DJGPP seems to
work fine for C and C++.

Any suggestions would be greatly appreciated.

(My trivial program is attached below.  I think it is correct, but it
*is* the first I have ever written in Obj-C, so please forgive some
errors in style)

Thanks in advance.

--
David Monksfield <drm AT myob DOT demon DOT co DOT uk>


========================== CUT HERE ==========================
#include "stdio.h"
#include "objc/Object.h"

@interface TestObj : Object
{
    int TestValue;
}
+ new;
- set: (int) NewValue;
- (int) get;
@end

@implementation TestObj
+ new
{
    id TempObj;

    TempObj = [super new];
    [TempObj set: 0];
    return TempObj;
}

- set: (int) NewValue
{
    TestValue = NewValue;
}

- (int) get
{
    return TestValue;
}
@end

int
main (void)
{
    id a, b, c;

    a = [TestObj new];
    b = [TestObj new];
    c = [TestObj new];

    [a set: 1];
    [b set: 99];

    printf ("Values %d, %d, %d\n", [a get], [b get], [c get]);
}
========================== CUT HERE ==========================