From 562fb69d75c48f6d116134537ff502ddbc12e763 Mon Sep 17 00:00:00 2001
From: Alexey Edelev <alexey.edelev@qt.io>
Date: Tue, 29 Dec 2020 14:35:25 +0100
Subject: [PATCH] CMake: Add proactive check of generator multi-config
 capabilities

Add explicit error, if multi-config build is requested, but selected
generator doesn't support it.

Fixes: QTBUG-88287
Change-Id: I6dba589bb59ad69fa07221c657df272ec75c359b
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
(cherry picked from commit 52e1603e33db9ef29fe1eff8c689d38166d393f1)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 cmake/QtProcessConfigureArgs.cmake | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/cmake/QtProcessConfigureArgs.cmake b/cmake/QtProcessConfigureArgs.cmake
index 021b2abdefb..228d2060da5 100644
--- a/cmake/QtProcessConfigureArgs.cmake
+++ b/cmake/QtProcessConfigureArgs.cmake
@@ -774,6 +774,16 @@ if(NOT generator AND auto_detect_generator)
         endif()
     endif()
 endif()
+
+if(multi_config
+  AND NOT "${generator}" STREQUAL "Xcode"
+  AND NOT "${generator}" STREQUAL "Ninja Multi-Config"
+  AND NOT "${generator}" MATCHES "^Visual Studio")
+    message(FATAL_ERROR "Multi-config build is only supported by Xcode, Ninja Multi-Config and \
+Visual Studio generators. Current generator is \"${generator}\".
+Note: Use '-cmake-generator <generator name>' option to specify the generator manually.")
+endif()
+
 if(generator)
     push(-G "${generator}")
 endif()