From 2d760a28b3479bcbb39d512cf9930b46d17d5364 Mon Sep 17 00:00:00 2001
From: aszlig <aszlig@redmoonstudios.org>
Date: Sun, 12 Apr 2015 10:32:18 +0200
Subject: [PATCH] boost: Supply some configure flags for mingw.

Otherwise, Boost.Build is trying to compile against pthread and
desperately searches for icu/iconv.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
---
 pkgs/development/libraries/boost/generic.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/libraries/boost/generic.nix b/pkgs/development/libraries/boost/generic.nix
index 65d188a86c5..758d95309bb 100644
--- a/pkgs/development/libraries/boost/generic.nix
+++ b/pkgs/development/libraries/boost/generic.nix
@@ -76,6 +76,9 @@ let
     "--user-config=user-config.jam"
     "toolset=gcc-cross"
     "--without-python"
+  ] ++ optionals stdenv.isCrossWin [
+    "target-os=windows"
+    "threadapi=win32"
   ];
   crossB2Args = concatStringsSep " " (genericB2Flags ++ crossB2Flags);