From 27353f135c645ae40ea87946da6ebdb7978599f4 Mon Sep 17 00:00:00 2001
From: eryngion <eryngion@protonmail.com>
Date: Thu, 7 Dec 2023 01:06:30 +0300
Subject: [PATCH] qt5.qtbase: fix mysql support for cross builds

---
 pkgs/development/libraries/qt-5/5.15/default.nix   | 4 ++++
 pkgs/development/libraries/qt-5/modules/qtbase.nix | 7 +++----
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/pkgs/development/libraries/qt-5/5.15/default.nix b/pkgs/development/libraries/qt-5/5.15/default.nix
index 420274b5b98d8..76528789b03cb 100644
--- a/pkgs/development/libraries/qt-5/5.15/default.nix
+++ b/pkgs/development/libraries/qt-5/5.15/default.nix
@@ -46,6 +46,10 @@ let
       ./qtbase.patch.d/0010-qtbase-assert.patch
       ./qtbase.patch.d/0011-fix-header_module.patch
       ./qtbase.patch.d/0015-qtbase-cross-build.patch
+      (fetchpatch {
+        url = "https://sources.debian.org/data/main/q/qtbase-opensource-src/5.15.8%2Bdfsg-11/debian/patches/cross_build_mysql.diff";
+        hash = "sha256-tzmmLmMXmeDwRVjdpWekDJvSkrIIlslC12HP7XPcm3E=";
+      })
     ];
     qtdeclarative = [
       ./qtdeclarative.patch
diff --git a/pkgs/development/libraries/qt-5/modules/qtbase.nix b/pkgs/development/libraries/qt-5/modules/qtbase.nix
index 6e4fe01e42dc0..58a3d5d219bd7 100644
--- a/pkgs/development/libraries/qt-5/modules/qtbase.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtbase.nix
@@ -20,8 +20,7 @@
   # options
 , libGLSupported ? !stdenv.isDarwin
 , libGL
-  # qmake detection for libmysqlclient does not seem to work when cross compiling
-, mysqlSupport ? stdenv.hostPlatform == stdenv.buildPlatform
+, mysqlSupport ? true
 , libmysqlclient
 , buildExamples ? false
 , buildTests ? false
@@ -393,8 +392,8 @@ stdenv.mkDerivation (finalAttrs: ({
       "-I" "${cups.dev}/include"
 
     ] ++ lib.optionals (mysqlSupport) [
-      "-L" "${libmysqlclient}/lib"
-      "-I" "${libmysqlclient}/include"
+      "-L" "${libmysqlclient}/lib/mysql"
+      "-I" "${libmysqlclient.dev}/include/mysql"
     ]
 
   # cross compilation options