Patch for compilation on Hurd

[nomeata]

Yes, you heard correctly. Some guys have build GHC and all the other Haskell packages in Debian on the Hurd, and only this small patch is required (Author credits go to Samuel Thibault <sthibault@…>,  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=659530)

--- ./rts/Linker.c.orig	2012-02-11 23:05:17.000000000 +0100
+++ ./rts/Linker.c	2012-02-11 23:10:16.000000000 +0100
@@ -74,7 +74,7 @@
     (   defined(linux_HOST_OS    ) || defined(freebsd_HOST_OS) || \
         defined(dragonfly_HOST_OS) || defined(netbsd_HOST_OS ) || \
         defined(openbsd_HOST_OS  ) || defined(darwin_HOST_OS ) || \
-        defined(kfreebsdgnu_HOST_OS) )
+        defined(kfreebsdgnu_HOST_OS) || defined(gnu_HOST_OS))
 /* Don't use mmap on powerpc_HOST_ARCH as mmap doesn't support
  * reallocating but we need to allocate jump islands just after each
  * object images. Otherwise relative branches to jump islands can fail
@@ -90,7 +90,7 @@
 
 #endif
 
-#if defined(linux_HOST_OS) || defined(solaris2_HOST_OS) || defined(freebsd_HOST_OS) || defined(kfreebsdgnu_HOST_OS) || defined(dragonfly_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS)
+#if defined(linux_HOST_OS) || defined(solaris2_HOST_OS) || defined(freebsd_HOST_OS) || defined(kfreebsdgnu_HOST_OS) || defined(dragonfly_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS) || defined(gnu_HOST_OS)
 #  define OBJFORMAT_ELF
 #  include <regex.h>    // regex is already used by dlopen() so this is OK
                         // to use here without requiring an additional lib

[pcapriotti]

Merged to HEAD (d2b538c80c00a99a51e4892dec475eae38cf9888) and stable (6fd28f6fc1c3ed38f678091188486855f648106e).

[nomeata]

Thanks!