[LLVMdev] [LLD] support for dlltool generated libs in COFF/PECOFF

[Rui Ueyama]

Hi Martell,

Sorry for the belated response. I missed this email.

I took a quick look at the library file you have attached and noticed that
the file consists of regular object files. LLD expects that all dllimported
symbols are described using "short import library" (PE/COFF spec 7).
Because I didn't test LLD with dlltool-style archive files, it's no
surprise that it didn't work (although it should theoretically work).

Do you think that you can make dlltool to generate short import libraries?
If you can, it would be the easiest way to solve the issue.

On Sat, Jul 25, 2015 at 6:23 AM, Martell Malone <martellmalone at gmail.com>
wrote:

> Hi Ivan, :)
>
> For testing purposes, I've managed to make the old COFF linker work with a
>> simple test case
>>
> Have you got patches for this that I can look at ?
>
> Had to make two little changes, and link the exe manually, because the
>> linker doesn't understand the GNU flags
>>
> I've solved the issue of having a GNU driver for the linker so that's not
> an issue anymore
> I sent in patches to the mailing list on this previously :)
> I keep them updated over in the msys2 project btw
>
> By the way, even the MS linker works with the binutils generated import
>> libraries.
>>
> Yes i assume binutils was based from a very old version of a MS linker
> which did this layout at the time.
> lld is so much newer and the MS linker has been updated to a more modern
> layout which is why we have this issue
>
> Kind Regards
> Martell
>
>
> On Sat, Jul 25, 2015 at 12:43 PM, Ivan Garramona <
> heavenandhell171 at gmail.com> wrote:
>
>> Hi Martell.
>>
>> I too was trying to make the new COFF linker recognize the libraries
>> generated by binutils, but it wasn't resolving the DLLs, just like you
>> described. Apparently it is not identifying the libraries as import
>> libraries but archives.
>>
>> For testing purposes, i've managed to make the old COFF linker work with
>> a simple test case. Had to make two little changes, and link the exe
>> manually, because the linker doesn't understand the GNU flags, but it
>> works. By the way, even the MS linker works with the binutils generated
>> import libraries.
>>
>>
>>
>
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