From 0976f9a6178877912443559955e98e5b67b3303b Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Fri, 11 Aug 2023 20:43:24 +0100
Subject: [PATCH] liburing: backport upstream parallel build fix

Without the change parallel build fails for me occasionally as:

       >      CC liburing-ffi.so.2.4
       > /nix/store/44xr71vsjfg2kz1hsxsq975day2fm12q-binutils-2.41/bin/ld: cannot find queue.os: No such file or directory
       > collect2: error: ld returned 1 exit status
       > make[1]: *** [Makefile:85: liburing-ffi.so.2.4] Error 1 shuffle=3560684383
       > make[1]: *** Waiting for unfinished jobs....
       > make[1]: Leaving directory '/build/liburing/src'
       > make: *** [Makefile:10: all] Error 2 shuffle=3560684383
---
 pkgs/development/libraries/liburing/default.nix | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/liburing/default.nix b/pkgs/development/libraries/liburing/default.nix
index 0f1757f4e61..5779389dda1 100644
--- a/pkgs/development/libraries/liburing/default.nix
+++ b/pkgs/development/libraries/liburing/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit }:
+{ lib, stdenv, fetchgit, fetchpatch }:
 
 stdenv.mkDerivation rec {
   pname = "liburing";
@@ -10,6 +10,16 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-vbe9uh9AqXyPkzwD6zHoHH3JMeAJEl2FSGzny1T7diM=";
   };
 
+  patches = [
+    # Pull upstream fix for parallel build failures:
+    #   https://github.com/axboe/liburing/pull/891
+    (fetchpatch {
+      name = "parallel.patch";
+      url = "https://github.com/axboe/liburing/commit/c34dca74854cb6e7f2b09affa2a4ab0145e62371.patch";
+      hash = "sha256-RZSgHdQy5d7mXtMvkMyr+/kMhp1w+S5v9cqk5NSii5o=";
+    })
+  ];
+
   separateDebugInfo = true;
   enableParallelBuilding = true;
   # Upstream's configure script is not autoconf generated, but a hand written one.