getAddrInfo and addrFamily not in scope on Windows GHC 6.8

[igloo]

Originally reported here: http://hackage.haskell.org/trac/ghc/ticket/2726

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import Network.Socket

... getAddrInfo

... addrFamily

--

gives me not in scope on Windows. The same code works on Unix.

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Looking at the code, these are only available if IPV6_SOCKET_SUPPORT is defined. I don't know more than that off the top of my head.

[bos]

This is really ugly to deal with. I've got tentative code that should (but doesn't) detect getaddrinfo on Windows properly. Easy, right?

The base problem is that a working version of the function wasn't introduced until Windows XP, but there's a cheeeezy hack for some earlier releases that tries to find a half-working version in wship6.dll via a runtime probe.

Gruesome details near the end of this page: http://msdn.microsoft.com/en-us/library/ms738520(VS.85).aspx

Gruesome details, part deux, in this thread: http://readlist.com/lists/lists.sourceforge.net/mingw-users/0/1544.html

Because autoconf goes out of its way to find a nice clean definition of a function, it's not even straightforward to write a correct autoconf macro to find getaddrinfo correctly on Windows. I'm trying to set the WINVER macro to 0x0501 (aka WindowsXP), but autoconf is undoing my work by deliberately doing a #undef getaddrinfo. It's all rather confusing.

[anonymous]

I've pushed some changes to the darcs repo that sort of fix this, but the code will only work on XP and Vista.

I'll write a version of getaddrinfo that should work on Windows 2000 with the IPv6 technology preview (it'll look in ws2_32.dll then wship6.dll at runtime, instead of link time), but it'll be maybe a week before I get that done.