From 35f39ac48ce6ed046b7dcce3ee6e8e9162ac12aa Mon Sep 17 00:00:00 2001
From: Nick Spinale <nick@nickspinale.com>
Date: Wed, 11 Sep 2019 13:07:31 +0000
Subject: dtc: make python bindings optional

dtc's build system does not support cross-compilation of its
swig-generated python bindings.
---
 pkgs/development/compilers/dtc/default.nix | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

(limited to 'pkgs/development/compilers/dtc')

diff --git a/pkgs/development/compilers/dtc/default.nix b/pkgs/development/compilers/dtc/default.nix
index ea305cc5c84c..dc628c0d7625 100644
--- a/pkgs/development/compilers/dtc/default.nix
+++ b/pkgs/development/compilers/dtc/default.nix
@@ -1,4 +1,6 @@
-{ stdenv, fetchgit, flex, bison, pkgconfig, python2, swig, which }:
+{ stdenv, lib, fetchgit, flex, bison, pkgconfig, which
+, pythonSupport ? stdenv.buildPlatform == stdenv.hostPlatform, python2, swig
+}:
 
 stdenv.mkDerivation rec {
   pname = "dtc";
@@ -10,16 +12,17 @@ stdenv.mkDerivation rec {
     sha256 = "075gj8bbahfdb8dlif3d2dpzjrkyf3bwbcmx96zpwhlgs0da8jxh";
   };
 
-  nativeBuildInputs = [ flex bison pkgconfig swig which ];
-  buildInputs = [ python2 ];
+  nativeBuildInputs = [ flex bison pkgconfig which ] ++ lib.optionals pythonSupport [ python2 swig ];
+  buildInputs = lib.optionals pythonSupport [ python2 ];
 
   postPatch = ''
     patchShebangs pylibfdt/
   '';
 
+  makeFlags = lib.optionals (!pythonSupport) [ "NO_PYTHON=1" ];
   installFlags = [ "INSTALL=install" "PREFIX=$(out)" "SETUP_PREFIX=$(out)" ];
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "Device Tree Compiler";
     homepage = https://git.kernel.org/cgit/utils/dtc/dtc.git;
     license = licenses.gpl2; # dtc itself is GPLv2, libfdt is dual GPL/BSD
-- 
cgit 1.4.1