From 0f8594170a7593063886fca4c3820a0b104a47d7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B8rn=20Forsman?= <bjorn.forsman@gmail.com>
Date: Thu, 7 Jun 2018 12:44:56 +0200
Subject: [PATCH] lttng-modules: add 'libelf' to fix build against linux 4.14

Fixes this:

$ nix-build -A linuxPackages.lttng-modules
[...]
/nix/store/...-linux-4.14.48-dev/lib/modules/4.14.48/source/Makefile:948: \
  *** "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfu

(Linux 4.16+ has other issues, so mark as broken.)
---
 pkgs/os-specific/linux/lttng-modules/default.nix | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/pkgs/os-specific/linux/lttng-modules/default.nix b/pkgs/os-specific/linux/lttng-modules/default.nix
index 7c2233714d4..413ac3efbe5 100644
--- a/pkgs/os-specific/linux/lttng-modules/default.nix
+++ b/pkgs/os-specific/linux/lttng-modules/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, kernel }:
+{ stdenv, fetchurl, kernel, libelf }:
 
 stdenv.mkDerivation rec {
   pname = "lttng-modules-${version}";
@@ -10,6 +10,8 @@ stdenv.mkDerivation rec {
     sha256 = "07rs01zwr4bmjamplix5qz1c6mb6wdawb68vyn0w6wx68ppbpnxq";
   };
 
+  buildInputs = [ libelf ];
+
   hardeningDisable = [ "pic" ];
 
   NIX_CFLAGS_COMPILE = [ "-Wno-error=implicit-function-declaration" ];
@@ -30,7 +32,7 @@ stdenv.mkDerivation rec {
     platforms = platforms.linux;
     maintainers = [ maintainers.bjornfor ];
     broken = builtins.compareVersions kernel.version "3.18" == -1
-      || builtins.compareVersions kernel.version "4.11" == 1;
+      || builtins.compareVersions kernel.version "4.16" == 1;
   };
 
 }