GDC and Tango problem

[revcompgeek]

On 12/29/09 2:41 PM, Steven Schveighoffer wrote:
> On Tue, 29 Dec 2009 16:34:20 -0500, grauzone <none at example.net> wrote:
>
>> revcompgeek wrote:
>>> So I tried building Tango trunk a while ago, and it actually built
>>> surprisingly well, with only one small error I was able to fix. So I
>>> installed the tango library and proceeded to test if tango was really
>>> working. So in hello.d:
>>> import tango.io.Stdout;
>>> void main(){ Stdout("Hello {}!","World").newline; }
>>> I don't know why, but I had to manually add object.d to the command
>>> line. To simplify, I put an object file of object.d into the current
>>> directory.
>>> tests% gdc -o hello hello.d object.o -lgtango -lgphobos
>>> ld: duplicate symbol __D6object9Interface6__initZ in
>>> /usr/local/lib/libgphobos.a(object.o) and object.o
>>> collect2: ld returned 1 exit status
>>> I'm not sure if this problem is an issue with gdc or a problem with
>>> Tango. Any ideas on how to fix this?
>>
>> You're linking with both Phobos and Tango. You can't do that, because
>> both come with their own (incompatible) runtime. Removing the
>> "-lgphobos" should work.
>
> I think you need -lgphobos. Last time gdc was updated, the compiler
> called the runtime gphobos, even though it was just the runtime :) Even
> with dmd, tango needed to call the runtime libphobos to get it to link
> because the name was hard-coded in the compiler. Subsequent versions of
> dmd allowed changing the runtime library name. I don't know if gdc was
> updated to do the same.
>
> I think the problem is adding object.d to the command line, you should
> not have to do that. The user is probably missing object.di. I'm not
> sure how well the latest tango works with gdc. It's probably better to
> ask on the tango forums (http://www.dsource.org/projects/tango/forums).
>
> -Steve

If I don't add object.d to the command line, I get a ton more missing 
symbols. I had also originally tried replacing libgphobos.a with 
libgtango.a, but that didn't work either. I will try posting to the 
forums, thanks.