[Haskell-cafe] Linking + zstd on FreeBSD

[Vanessa McHale]

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
> <mailto: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
>     <mailto: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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