From 1cfe9539f99d4d0f9dd00a48f79d13e8a37b4d08 Mon Sep 17 00:00:00 2001
From: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
Date: Sun, 27 Aug 2017 23:05:28 +0300
Subject: [PATCH] libgcrypt: Add pre-ARMv7 patch

Apparently the assembly-optimized functions use an opcode that doesn't
work on pre-ARMv7. Fix in next release.
---
 pkgs/development/libraries/libgcrypt/default.nix | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/libgcrypt/default.nix b/pkgs/development/libraries/libgcrypt/default.nix
index 5bcb8c5fe98a..732f3710563a 100644
--- a/pkgs/development/libraries/libgcrypt/default.nix
+++ b/pkgs/development/libraries/libgcrypt/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, libgpgerror, enableCapabilities ? false, libcap }:
+{ stdenv, fetchurl, fetchpatch, libgpgerror, enableCapabilities ? false, libcap }:
 
 assert enableCapabilities -> stdenv.isLinux;
 
@@ -22,6 +22,15 @@ stdenv.mkDerivation rec {
   buildInputs = [ libgpgerror ]
     ++ stdenv.lib.optional enableCapabilities libcap;
 
+  # Shouldn't be needed after 1.8.1
+  patches = if stdenv.isArm && stdenv.system != "armv7l-linux"
+    then fetchpatch {
+        url = "https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=patch;h=4a7aa30ae9f3ce798dd886c2f2d4164c43027748";
+        name = "arm.patch";
+        sha256 = "1dq9s0xwpbg7s5sghvssmwh4v88x733zm6c8ab3flllq8h7c8fq5";
+      }
+    else null;
+
   # Make sure libraries are correct for .pc and .la files
   # Also make sure includes are fixed for callers who don't use libgpgcrypt-config
   postFixup = ''