The entries in the dll do look different:

d000331.o:
0000000000000000 i .idata$4
0000000000000000 i .idata$5
0000000000000000 i .idata$6
0000000000000000 i .idata$7
0000000000000000 t .text
0000000000000000 T __gmpn_sub
0000000000000000 I __imp___gmpn_sub
                 U _head_cygmpir_16_dll

d000330.o:
0000000000000000 i .idata$4
0000000000000000 i .idata$5
0000000000000000 i .idata$6
0000000000000000 i .idata$7
0000000000000000 t .text
0000000000000000 I __imp___gmpn_store
0000000000000000 I __nm___gmpn_store
                 U _head_cygmpir_16_dll

It looks like the symbol name is not exported properly.There's no T entry!

Bill.


On 1 April 2014 23:34, Bill Hart <goodwillh...@googlemail.com> wrote:

> Sadly I don't have gdb. But what on earth possesses it to miscompile a
> call to that function and not any other?
>
> Bill.
>
>
> On 1 April 2014 23:31, Bill Hart <goodwillh...@googlemail.com> wrote:
>
>> Even calling mpn_store directly segfaults.
>>
>> Bill.
>>
>>
>> On 1 April 2014 23:27, Bill Hart <goodwillh...@googlemail.com> wrote:
>>
>>> Got it. And it in fact segfaults.
>>>
>>> Bill.
>>>
>>>
>>> On 1 April 2014 23:22, Jean-Pierre Flori <jpfl...@gmail.com> wrote:
>>>
>>>>
>>>>
>>>> On Tuesday, April 1, 2014 11:21:09 PM UTC+2, Bill Hart wrote:
>>>>>
>>>>> How? It doesn't seem to work.
>>>>>
>>>>> Something like:
>>>> PATH=<path to cygmpir>:$PATH ./<exename>
>>>>
>>>
>>>
>>
>

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