Hi,

I have a problem when I try to compile Derelict3 under linux. I try different orders of the linked libraries without success.

I've got this error:

/home/martin/Derelict3/lib/dmd/libDerelictSDL2.a(sdl_106_698.o):(.rodata+0x3094):
référence indéfinie vers « _D6object6Object8opEqualsMFC6ObjectC6ObjectZb »
collect2: erreur: ld a retourné 1 code d'état d'exécution

I'm using "pragma" instructions but it's the same with passing the "-L-l" argument to "dmd":

Here is my little source file:

module main;

import std.stdio;
import derelict.sdl2.sdl;

pragma(lib,"dl");
pragma(lib,"DerelictSDL2");
pragma(lib,"DerelictUtil");

void main()
{
  DerelictSDL2.load();
  SDL_Init(SDL_INIT_EVERYTHING);
  SDL_Quit();
}

Here is the command line extracted using the --verbose argument, that produce the error:

gcc main.o -o main -m32 -L/home/martin/Derelict3/lib/dmd -L/usr/lib/i386-linux-gnu -L/usr/lib/x86_64-linux-gnu -Xlinker
--no-warn-search-mismatch -Xlinker --export-dynamic
-lDerelictSDL2 -lDerelictUtil -ldl -l:libphobos2.a -lpthread -lm -lrt

I got the official ubuntu package from the dlang.org and try on 4 differents computer. It only works on Windows.

How I can solve this, please?

On Mon, 22 Jul 2013 20:07:28 +0200, moechofe wrote:

> Hi,
> 
> I have a problem when I try to compile Derelict3 under linux. I try different orders of the linked libraries without success.
> 
> I've got this error:
> 
> /home/martin/Derelict3/lib/dmd/libDerelictSDL2.a(sdl_106_698.o):(.rodata
+0x3094):
> référence indéfinie vers «
> _D6object6Object8opEqualsMFC6ObjectC6ObjectZb »
> collect2: erreur: ld a retourné 1 code d'état d'exécution
> 
> I'm using "pragma" instructions but it's the same with passing the "-L-l" argument to "dmd":
> 
> Here is my little source file:
> 
> module main;
> 
> import std.stdio;
> import derelict.sdl2.sdl;
> 
> pragma(lib,"dl");
> pragma(lib,"DerelictSDL2");
> pragma(lib,"DerelictUtil");
> 

You should link dependencies _after_ the library which depends on them. In particular, your pragmas should go in this order:

pragma(lib,"DerelictSDL2");
pragma(lib,"DerelictUtil");
pragma(lib,"dl");

That said, your error looks like a problem between DerelictSDL and phobos;  make sure the derelict libraries have been compiled with the same compiler version that you're trying to use.

Justin Whear <justin@economicmodeling.com> wrote:
> On Mon, 22 Jul 2013 20:07:28 +0200, moechofe wrote:
> 
>> Hi,
>> 
>> I have a problem when I try to compile Derelict3 under linux. I try different orders of the linked libraries without success.
>> 
>> I've got this error:
>> 
>> /home/martin/Derelict3/lib/dmd/libDerelictSDL2.a(sdl_106_698.o):(.rodata
> +0x3094):
>> référence indéfinie vers «
>> _D6object6Object8opEqualsMFC6ObjectC6ObjectZb »
>> collect2: erreur: ld a retourné 1 code d'état d'exécution
>> 
>> I'm using "pragma" instructions but it's the same with passing the "-L-l" argument to "dmd":
>> 
>> Here is my little source file:
>> 
>> module main;
>> 
>> import std.stdio;
>> import derelict.sdl2.sdl;
>> 
>> pragma(lib,"dl");
>> pragma(lib,"DerelictSDL2");
>> pragma(lib,"DerelictUtil");
>> 
> 
> You should link dependencies _after_ the library which depends on them. In particular, your pragmas should go in this order:
> 
> pragma(lib,"DerelictSDL2");
> pragma(lib,"DerelictUtil");
> pragma(lib,"dl");
> 
> That said, your error looks like a problem between DerelictSDL and phobos;  make sure the derelict libraries have been compiled with the same compiler version that you're trying to use.

Thanx, It works by putting "dl" at the end.