From 2b1ce6154862ad7f2bac1c90628fc44f9a66b209 Mon Sep 17 00:00:00 2001
From: Christian Kampka <christian@kampka.net>
Date: Mon, 31 Aug 2020 10:45:53 +0200
Subject: [PATCH] mbuffer: Use objdump from environment when cross-building

The mbuffer configure scripts fails to recognize the correct
objdump binary during cross-building for foreign platforms.
The correct objdump is exposed via the environment variable
$OBJDUMP, which should be used in such cases.
---
 pkgs/tools/misc/mbuffer/default.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pkgs/tools/misc/mbuffer/default.nix b/pkgs/tools/misc/mbuffer/default.nix
index 8b1cb938fb7..d86f824b87f 100644
--- a/pkgs/tools/misc/mbuffer/default.nix
+++ b/pkgs/tools/misc/mbuffer/default.nix
@@ -12,6 +12,14 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs = [ openssl ];
+
+  # The mbuffer configure scripts fails to recognize the correct
+  # objdump binary during cross-building for foreign platforms.
+  # The correct objdump is exposed via the environment variable
+  # $OBJDUMP, which should be used in such cases.
+  preConfigure = stdenv.lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) ''
+    substituteInPlace configure --replace "OBJDUMP=$ac_cv_path_OBJDUMP" 'OBJDUMP=''${OBJDUMP}'
+  '';
   doCheck = true;
 
   meta = {