From 42070c9b0d9e700b0eaf2c49e52955af88155b17 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Tue, 11 Dec 2018 22:48:45 +0000
Subject: [PATCH] tcl: enable threads and 64-bit support

64-bit support is only enabled on 64-bit systems
---
 pkgs/development/interpreters/tcl/generic.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/interpreters/tcl/generic.nix b/pkgs/development/interpreters/tcl/generic.nix
index e1925821e5a..011b3a125ef 100644
--- a/pkgs/development/interpreters/tcl/generic.nix
+++ b/pkgs/development/interpreters/tcl/generic.nix
@@ -19,13 +19,14 @@ stdenv.mkDerivation rec {
   '';
 
   configureFlags = [
+    "--enable-threads"
     # Note: using $out instead of $man to prevent a runtime dependency on $man.
     "--mandir=${placeholder "out"}/share/man"
     "--enable-man-symlinks"
     # Don't install tzdata because NixOS already has a more up-to-date copy.
     "--with-tzdata=no"
     "tcl_cv_strtod_unbroken=ok"
-  ];
+  ] ++ stdenv.lib.optional stdenv.is64bit "--enable-64bit";
 
   enableParallelBuilding = true;