From 3bf20021999d7095fc10073d84d28d9c7b648bf0 Mon Sep 17 00:00:00 2001
From: Will Dietz <w@wdtz.org>
Date: Sat, 24 Mar 2018 20:49:12 -0500
Subject: [PATCH] celt-0.5.1: disable tests that fail to build due to bad code

These were fixed upstream, but patches don't apply to
0.5.1 which we need to use for spice.

Instead of maintaining backported patches for very deprecated
software, just don't build the tests in the first place.
---
 pkgs/development/libraries/celt/0.5.1.nix   | 7 +++++++
 pkgs/development/libraries/celt/generic.nix | 3 +++
 2 files changed, 10 insertions(+)

diff --git a/pkgs/development/libraries/celt/0.5.1.nix b/pkgs/development/libraries/celt/0.5.1.nix
index 561be1ba281..e45d74345d4 100644
--- a/pkgs/development/libraries/celt/0.5.1.nix
+++ b/pkgs/development/libraries/celt/0.5.1.nix
@@ -7,4 +7,11 @@ callPackage ./generic.nix (args // rec{
     url = "http://downloads.xiph.org/releases/celt/celt-${version}.tar.gz";
     sha256 = "0bkam9z5vnrxpbxkkh9kw6yzjka9di56h11iijikdd1f71l5nbpw";
   };
+
+  # Don't build tests due to badness with ec_ilog
+  prePatch = ''
+    substituteInPlace Makefile.in \
+      --replace 'SUBDIRS = libcelt tests' \
+                'SUBDIRS = libcelt'
+  '';
 })
diff --git a/pkgs/development/libraries/celt/generic.nix b/pkgs/development/libraries/celt/generic.nix
index 4ab554561f7..9d861f2c432 100644
--- a/pkgs/development/libraries/celt/generic.nix
+++ b/pkgs/development/libraries/celt/generic.nix
@@ -1,5 +1,6 @@
 { stdenv, version, src
 , liboggSupport ? true, libogg ? null # if disabled only the library will be built
+, prePatch ? ""
 , ...
 }:
 
@@ -10,6 +11,8 @@ stdenv.mkDerivation rec {
 
   inherit src;
 
+  inherit prePatch;
+
   buildInputs = []
     ++ stdenv.lib.optional liboggSupport libogg;