From 39674b52b3b4f7cf915a3ff5be7e97fd12903ba6 Mon Sep 17 00:00:00 2001
From: SpaceIm <30052553+SpaceIm@users.noreply.github.com>
Date: Thu, 15 Dec 2022 15:05:14 +0100
Subject: [PATCH] (#14727) qwt: hack to avoid qt in build requirements for
 native build

---
 recipes/qwt/all/conanfile.py | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/recipes/qwt/all/conanfile.py b/recipes/qwt/all/conanfile.py
index 491142fd39..e2134db893 100644
--- a/recipes/qwt/all/conanfile.py
+++ b/recipes/qwt/all/conanfile.py
@@ -2,6 +2,7 @@ from conan import ConanFile
 from conan.errors import ConanInvalidConfiguration
 from conan.tools.build import cross_building
 from conan.tools.cmake import CMake, CMakeToolchain, CMakeDeps, cmake_layout
+from conan.tools.env import VirtualBuildEnv, VirtualRunEnv
 from conan.tools.files import apply_conandata_patches, copy, export_conandata_patches, get, rmdir
 from conan.tools.scm import Version
 import os
@@ -73,12 +74,20 @@ class QwtConan(ConanFile):
             raise ConanInvalidConfiguration("qwt:designer=True requires qt:qttools=True, qt::gui=True and qt::widgets=True")
 
     def build_requirements(self):
-        self.tool_requires("qt/5.15.7")
+        if hasattr(self, "settings_build") and cross_building(self):
+            self.tool_requires("qt/5.15.7")
 
     def source(self):
         get(self, **self.conan_data["sources"][self.version], destination=self.source_folder, strip_root=True)
 
     def generate(self):
+        if hasattr(self, "settings_build") and cross_building(self):
+            env = VirtualBuildEnv(self)
+            env.generate()
+        else:
+            env = VirtualRunEnv(self)
+            env.generate(scope="build")
+
         tc = CMakeToolchain(self)
         tc.variables["QWT_DLL"] = self.options.shared
         tc.variables["QWT_STATIC "] = not self.options.shared