So test.d depends on libgmp.a

Unsurprisingly:
$dmd test.d
 fails to find libgmp.a

So tell it  to look
$dmd  -L-lgmp test.d

finds the wrong one or doesn't find it.

Tell it where to look

$dmd -L-L/usr/local/lib -L-lgmp test.d

Ok. Now it fails to find Phobos. Ok

$dmd -L-L/usr/local/lib -L-L/usr/share/dmd/lib -L-lgmp -L-lphobos2 test.d

... still fails to find Phobos. WTF? is there a way out of this revolving door?

reordering the linker flags doesn't seem to help.

Also is there a binding to GMP somewhere? I just hacked one together.

-Nic

On 7/2/15 8:10 AM, Nicholas Wilson wrote:
> So test.d depends on libgmp.a
>
> Unsurprisingly:
> $dmd test.d
>   fails to find libgmp.a
>
> So tell it  to look
> $dmd  -L-lgmp test.d
>
> finds the wrong one or doesn't find it.
>
> Tell it where to look
>
> $dmd -L-L/usr/local/lib -L-lgmp test.d
>
> Ok. Now it fails to find Phobos. Ok
>
> $dmd -L-L/usr/local/lib -L-L/usr/share/dmd/lib -L-lgmp -L-lphobos2 test.d
>
> .... still fails to find Phobos. WTF? is there a way out of this
> revolving door?
>
> reordering the linker flags doesn't seem to help.
>
> Also is there a binding to GMP somewhere? I just hacked one together.

Try dmd -v, it will tell you the link line. Then you can try it yourself to see how to get it to work. I know dmd has problems with link line parameters, because it always puts Phobos somewhere. But this is generally for libraries that Phobos needs, not user code.

A full example may be useful too.

-Steve

On Thursday, 2 July 2015 at 12:19:06 UTC, Steven Schveighoffer wrote:
> On 7/2/15 8:10 AM, Nicholas Wilson wrote:
>> [...]
>
> Try dmd -v, it will tell you the link line. Then you can try it yourself to see how to get it to work. I know dmd has problems with link line parameters, because it always puts Phobos somewhere. But this is generally for libraries that Phobos needs, not user code.
>
> A full example may be useful too.
>
> -Steve

linker command is
gcc test2.o -o test -m64 -L/usr/share/dmd/lib -L/usr/local/lib -lgmp -lphobos2 -L/Users/nicholaswilson/d/lib/ -lphobos2 -lpthread -lm

On Thursday, 2 July 2015 at 12:47:52 UTC, Nicholas Wilson wrote:
> On Thursday, 2 July 2015 at 12:19:06 UTC, Steven Schveighoffer wrote:
>> On 7/2/15 8:10 AM, Nicholas Wilson wrote:
>>> [...]
>>
>> Try dmd -v, it will tell you the link line. Then you can try it yourself to see how to get it to work. I know dmd has problems with link line parameters, because it always puts Phobos somewhere. But this is generally for libraries that Phobos needs, not user code.
>>
>> A full example may be useful too.
>>
>> -Steve
>
> linker command is
> gcc test2.o -o test -m64 -L/usr/share/dmd/lib -L/usr/local/lib -lgmp -lphobos2 -L/Users/nicholaswilson/d/lib/ -lphobos2 -lpthread -lm

Are you on OSX? (I consider it from /Users instead of /home) Try export LIBRARY_PATH=/usr/local/lib.
Can you build C application linked to libgmp this way?

On 7/2/15 8:47 AM, Nicholas Wilson wrote:
> On Thursday, 2 July 2015 at 12:19:06 UTC, Steven Schveighoffer wrote:
>> On 7/2/15 8:10 AM, Nicholas Wilson wrote:
>>> [...]
>>
>> Try dmd -v, it will tell you the link line. Then you can try it
>> yourself to see how to get it to work. I know dmd has problems with
>> link line parameters, because it always puts Phobos somewhere. But
>> this is generally for libraries that Phobos needs, not user code.
>>
>> A full example may be useful too.
>>
>> -Steve
>
> linker command is
> gcc test2.o -o test -m64 -L/usr/share/dmd/lib -L/usr/local/lib -lgmp
> -lphobos2 -L/Users/nicholaswilson/d/lib/ -lphobos2 -lpthread -lm

OK, but what I meant was, run this line yourself and see if you can get it to link by tweaking things :)

D isn't doing anything magic here. And without full code/environment, it's impossible to tell you why this doesn't work.

-Steve

On Thursday, 2 July 2015 at 12:10:52 UTC, Nicholas Wilson wrote:
> Also is there a binding to GMP somewhere? I just hacked one together.

I could need the bindings to fix the pidigits benchmark.

There is this 7y old code on dsource: http://www.dsource.org/projects/bindings/browser/trunk/gmp

The readme says "This is in alpha state. All functions that have been tried seem to work. (8 out of many)", so not that confident.