network installs on Windows with cabal, but cannot be linked

[S11001001]

Reproduced with GHC 7.8.3 in Platform 2014.2.0.0, and GHC 7.8.4 Windows binary by @joshcough. Applies to various versions, including (reinstalling) the exact version included with Platform.

Basics:

Preprocessing library ghc784-windows-network-0.1.0.0...
[1 of 2] Compiling NetTest          ( src\NetTest.hs, dist\build\NetTest.o )
[2 of 2] Compiling NetTest2         ( src\NetTest2.hs, dist\build\NetTest2.o )
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Loading package array-0.5.0.0 ... linking ... done.
Loading package deepseq-1.3.0.2 ... linking ... done.
Loading package containers-0.5.5.1 ... linking ... done.
Loading package pretty-1.1.1.1 ... linking ... done.
Loading package template-haskell ... linking ... done.
Loading package bytestring-0.10.4.0 ... linking ... done.
Loading package network-2.6.0.2 ... linking ... 
<no location info>:
    ghc.exe: unable to load package `network-2.6.0.2'
ghc.exe: J:\scompall\src\ghc-7.8.4-windows-network\.cabal-sandbox\x86_64-windows-ghc-7.8.3\network-2.6.0.2\HSnetwork-2.6.0.2.o: unknown symbol `shutdownWinSock'

This is not like the various other network issues reported here. The network build completed successfully; it is just that the result can't be linked.

Basic reproduction explained in https://bitbucket.org/S11001001/ghc-7.8.4-windows-network/ ; originally found for ermine-language/ermine#17.

[ndmitchell]

I've had this a bunch of times. I switched to MinGHC and the problems all went away: https://github.com/fpco/minghc

My best guess is it was due to calling conventions and name mangling being configured wrongly, but I never really tracked it down.

[snoyberg]

We just spent quite a while debugging this at fpco/minghc#42. It appears that the fix for this was written in December, but never released:

2e40d5e

@tibbe This is a major issue for Windows, can we get a patch release for this onto Hackage ASAP?

[tibbe]

Released as 2.6.1.0.

[snoyberg]

Thank you!

On Thu, May 7, 2015, 10:22 AM Johan Tibell [email protected] wrote:

Released as 2.6.1.0.

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