From e1b9b3e251e61e8c0bb7e2da6b55257b42a34757 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Wed, 1 May 2024 09:25:39 +0200
Subject: [PATCH 1/3] element-desktop: fix cross build

---
 .../instant-messengers/element/keytar/default.nix   | 13 ++++++++++++-
 .../instant-messengers/element/seshat/default.nix   |  4 ++--
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/pkgs/applications/networking/instant-messengers/element/keytar/default.nix b/pkgs/applications/networking/instant-messengers/element/keytar/default.nix
index 84196371be3a..d43894e08239 100644
--- a/pkgs/applications/networking/instant-messengers/element/keytar/default.nix
+++ b/pkgs/applications/networking/instant-messengers/element/keytar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, nodejs, python3, callPackage, removeReferencesTo
+{ lib, stdenv, fetchFromGitHub, nodejs, python3, removeReferencesTo
 , pkg-config, libsecret, xcbuild, Security, AppKit, fetchNpmDeps, npmHooks }:
 
 let
@@ -31,6 +31,17 @@ in stdenv.mkDerivation rec {
 
   doCheck = false;
 
+  postPatch = lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) ''
+    pkg-config() { "''${PKG_CONFIG}" "$@"; }
+    export -f pkg-config
+  '';
+
+  # https://nodejs.org/api/os.html#osarch
+  npmFlagsArray = [ "--arch=${if stdenv.hostPlatform.parsed.cpu.name == "i686" then "ia32"
+                             else if stdenv.hostPlatform.parsed.cpu.name == "x86_64" then "x64"
+                             else if stdenv.hostPlatform.parsed.cpu.name == "aarch64" then "arm64"
+                             else stdenv.hostPlatform.parsed.cpu.name}" ];
+
   installPhase = ''
     runHook preInstall
     shopt -s extglob
diff --git a/pkgs/applications/networking/instant-messengers/element/seshat/default.nix b/pkgs/applications/networking/instant-messengers/element/seshat/default.nix
index ed6b5ebe72a6..c1c9a57d4356 100644
--- a/pkgs/applications/networking/instant-messengers/element/seshat/default.nix
+++ b/pkgs/applications/networking/instant-messengers/element/seshat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, callPackage, sqlcipher, nodejs, python3, yarn, fixup-yarn-lock, CoreServices, fetchYarnDeps, removeReferencesTo }:
+{ lib, stdenv, rustPlatform, fetchFromGitHub, rust, sqlcipher, nodejs, python3, yarn, fixup-yarn-lock, CoreServices, fetchYarnDeps, removeReferencesTo }:
 
 let
   pinData = lib.importJSON ./pin.json;
@@ -36,7 +36,7 @@ in rustPlatform.buildRustPackage rec {
     fixup-yarn-lock yarn.lock
     yarn install --offline --frozen-lockfile --ignore-platform --ignore-scripts --no-progress --non-interactive
     patchShebangs node_modules/
-    node_modules/.bin/neon build --release
+    node_modules/.bin/neon build --release -- --target ${rust.toRustTargetSpec stdenv.hostPlatform} -Z unstable-options --out-dir target/release
     runHook postBuild
   '';
 

From 2fe65e94c1d09047ed0d65fef82891c5aea8a4f0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Wed, 1 May 2024 11:23:08 +0200
Subject: [PATCH 2/3] electron: fix cross compilation

---
 .../networking/browsers/chromium/common.nix           | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/pkgs/applications/networking/browsers/chromium/common.nix b/pkgs/applications/networking/browsers/chromium/common.nix
index 20e987facdc3..5770456f177f 100644
--- a/pkgs/applications/networking/browsers/chromium/common.nix
+++ b/pkgs/applications/networking/browsers/chromium/common.nix
@@ -20,6 +20,7 @@
 , pkgsBuildHost
 # configurePhase:
 , gnChromium
+, symlinkJoin
 
 # Build inputs:
 , libpng
@@ -360,6 +361,14 @@ let
       ${ungoogler}/utils/domain_substitution.py apply -r ${ungoogler}/domain_regex.list -f ${ungoogler}/domain_substitution.list -c ./ungoogled-domsubcache.tar.gz .
     '';
 
+    llvmCcAndBintools = symlinkJoin {
+      name = "llvmCcAndBintools";
+      paths = [
+        pkgsBuildTarget.${llvmPackages_attrName}.llvm
+        pkgsBuildTarget.${llvmPackages_attrName}.stdenv.cc
+      ];
+    };
+
     gnFlags = mkGnFlags ({
       # Main build and toolchain settings:
       # Create an official and optimized release build (only official builds
@@ -426,7 +435,7 @@ let
       rtc_use_pipewire = true;
       # Disable PGO because the profile data requires a newer compiler version (LLVM 14 isn't sufficient):
       chrome_pgo_phase = 0;
-      clang_base_path = "${pkgsBuildTarget.${llvmPackages_attrName}.stdenv.cc}";
+      clang_base_path = "${llvmCcAndBintools}";
       use_qt = false;
       # To fix the build as we don't provide libffi_pic.a
       # (ld.lld: error: unable to find library -l:libffi_pic.a):

From 8df62b078d46adec7da4daf8ab6b4132082283a1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Wed, 8 May 2024 10:35:18 +0000
Subject: [PATCH 3/3] python3.pkgs.dbus-python: fix cross build

---
 pkgs/development/python-modules/dbus-python/default.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/development/python-modules/dbus-python/default.nix b/pkgs/development/python-modules/dbus-python/default.nix
index 4e6f67f0a8ec..9b7656993c59 100644
--- a/pkgs/development/python-modules/dbus-python/default.nix
+++ b/pkgs/development/python-modules/dbus-python/default.nix
@@ -52,6 +52,7 @@ buildPythonPackage rec {
   '';
 
   nativeBuildInputs = [
+    dbus # build systems checks for `dbus-run-session` in PATH
     meson
     meson-python
     pkg-config