<div><div dir="auto">When binding c libraries, I often prefix a custom/unique Descriptive sequence for All linker visible symbols. </div></div><div dir="auto"><br></div><div dir="auto">So Eg you could do vanmach_zstdlib_ as a prefix</div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jun 30, 2020 at 12:32 PM Jinwoo Lee <<a href="mailto:jinwoo68@gmail.com">jinwoo68@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="ltr"><div>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.</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jun 29, 2020 at 7:44 AM Vanessa McHale <<a href="mailto:vamchale@gmail.com" target="_blank">vamchale@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)">I tried linking against zstd within a Vagrant simulating FreeBSD. I get<br>
the following:<br>
<br>
ld: error: duplicate symbol: XXH64<br>
>>> defined at xxhash.c<br>
>>> xxhash.o:(XXH64) in archive<br>
/home/vagrant/.cabal/store/ghc-8.8.3/zstd-0.1.2.0-c8ee757c8e8a7307779ab3cfbc91f3445940e16bbf8f9916f4c90432a0ac499e/lib/libHSzstd-0.1.2.0-c8ee757c8e8a7307779ab3cfbc91f3445940e16bbf8f9916f4c90432a0ac499e.a<br>
>>> defined at xxhash.c:693<br>
(/wrkdirs/usr/ports/lang/ghc/work/ghc-8.8.3/rts/xxhash.c:693)<br>
>>> RTS.o:(.text.XXH64+0x0) in archive<br>
/usr/local/lib/ghc-8.8.3/rts/libHSrts.a<br>
<br>
...<br>
<br>
I am using GHC version 8.8.3_1 and cabal-install 3.0 installed by 'sudo<br>
pkg install ...'<br>
<br>
(I was trying to run cabal install language-dickinson)<br>
<br>
Cheers,<br>
Vanessa McHale<br>
<br>
<br>
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