[Haskell-cafe] Linking + zstd on FreeBSD

[Carter Schonwald]

That’s a really good question!

I guess one way to narrow it down is what’s the  linker implementation on
each env? I think you can arrange to use the same ld impl on bsd and Linux
if you want, since both are elf platforms.  Are they both doing dynamic or
static linking? Are they using the same Ld implementation?  It’s certainly
strange to have there be a difference in behavior between two x64 elf
platforms,

On Thu, Jul 9, 2020 at 8:31 AM Vanessa McHale <vamchale at gmail.com> wrote:

> Fair enough, I suppose what I don't understand is: why is this only
> happening on FreeBSD (in Vagrant)? I am able to compile on Linux, Mac, and
> Windows!
>
> Cheers,
> Vanessa McHale
> On 7/8/20 5:33 PM, Carter Schonwald wrote:
>
> When binding c libraries, I often prefix a custom/unique Descriptive
> sequence  for All linker visible symbols.
>
> So Eg you could do vanmach_zstdlib_ as a prefix
>
> On Tue, Jun 30, 2020 at 12:32 PM Jinwoo Lee <jinwoo68 at gmail.com> wrote:
>
>> The error message seems to say why. The GHC RTS already has xxhash.c and
>> zstd also has that file. I'm not sure how to resolve this though.
>>
>>
>> On Mon, Jun 29, 2020 at 7:44 AM Vanessa McHale <vamchale at gmail.com>
>> wrote:
>>
>>> I tried linking against zstd within a Vagrant simulating FreeBSD. I get
>>> the following:
>>>
>>> ld: error: duplicate symbol: XXH64
>>> >>> defined at xxhash.c
>>> >>>            xxhash.o:(XXH64) in archive
>>>
>>> /home/vagrant/.cabal/store/ghc-8.8.3/zstd-0.1.2.0-c8ee757c8e8a7307779ab3cfbc91f3445940e16bbf8f9916f4c90432a0ac499e/lib/libHSzstd-0.1.2.0-c8ee757c8e8a7307779ab3cfbc91f3445940e16bbf8f9916f4c90432a0ac499e.a
>>> >>> defined at xxhash.c:693
>>> (/wrkdirs/usr/ports/lang/ghc/work/ghc-8.8.3/rts/xxhash.c:693)
>>> >>>            RTS.o:(.text.XXH64+0x0) in archive
>>> /usr/local/lib/ghc-8.8.3/rts/libHSrts.a
>>>
>>> ...
>>>
>>> I am using GHC version 8.8.3_1 and cabal-install 3.0 installed by 'sudo
>>> pkg install ...'
>>>
>>> (I was trying to run cabal install language-dickinson)
>>>
>>> Cheers,
>>> Vanessa McHale
>>>
>>>
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