From 235c1c17662bca229537a560b79bd33b5fd3131b Mon Sep 17 00:00:00 2001
From: Chuang Zhu <git@chuang.cz>
Date: Thu, 28 Apr 2022 12:54:49 +0800
Subject: [PATCH] qtbase: use -pthread instead of -lpthread

This fixes "undefined reference to `__atomic_*'" errors when building
qt5.qtdeclarative on riscv64-linux.
---
 pkgs/development/libraries/qt-5/modules/qtbase.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/libraries/qt-5/modules/qtbase.nix b/pkgs/development/libraries/qt-5/modules/qtbase.nix
index c3da951ca523e..ba5f959ea4412 100644
--- a/pkgs/development/libraries/qt-5/modules/qtbase.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtbase.nix
@@ -116,6 +116,9 @@ stdenv.mkDerivation {
     sed -i '/PATHS.*NO_DEFAULT_PATH/ d' src/corelib/Qt5CoreMacros.cmake
     sed -i 's/NO_DEFAULT_PATH//' src/gui/Qt5GuiConfigExtras.cmake.in
     sed -i '/PATHS.*NO_DEFAULT_PATH/ d' mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in
+
+    # https://bugs.gentoo.org/803470
+    sed -i 's/-lpthread/-pthread/' mkspecs/common/linux.conf src/corelib/configure.json
   '' + lib.optionalString (compareVersion "5.15.0" >= 0) ''
     patchShebangs ./bin
   '' + (