Merge pull request #294508 from skeuchel/riscv-systemd

systemd: fix build on riscv64 and ppc64

pkgs/os-specific/linux/systemd/default.nix

@@ -5,6 +5,7 @@
 , nixosTests
 , pkgsCross
 , fetchFromGitHub
+, fetchpatch
 , fetchzip
 , buildPackages
 , makeBinaryWrapper
@@ -224,6 +225,15 @@ stdenv.mkDerivation (finalAttrs: {
     ./0017-meson.build-do-not-create-systemdstatedir.patch
   ] ++ lib.optional (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isGnu) [
     ./0018-timesyncd-disable-NSCD-when-DNSSEC-validation-is-dis.patch
+  ] ++ lib.optional (stdenv.hostPlatform.isPower || stdenv.hostPlatform.isRiscV) [
+    # Fixed upstream and included in the main and stable branches. Can be dropped
+    # when bumping to >= v255.5.
+    # https://github.com/systemd/systemd/issues/30448
+    # https://github.com/NixOS/nixpkgs/pull/282607
+    (fetchpatch {
+      url = "https://github.com/systemd/systemd/commit/8040fa55a1cbc34dede3205a902095ecd26c21e3.patch";
+      sha256 = "0l8jk0w0wavagzck0vy5m0s6fhxab0hpdr4ib111bacqrvvda3kd";
+    })
   ] ++ lib.optional stdenv.hostPlatform.isMusl (
     let
       oe-core = fetchzip {