From 1f3af0f35c16b3d125f494b60290a867375217d8 Mon Sep 17 00:00:00 2001
From: Joerg Bornemann <joerg.bornemann@qt.io>
Date: Fri, 26 Jun 2020 15:16:30 +0200
Subject: [PATCH] CMake: Fix double-negation of feature CONFIG values

The plugin-manifests feature has the "negative" CONFIG value
"no_plugin_manifest". On negation, we're supposed to strip off the
leading "no_" instead of adding another one.

Change-Id: Id2c66da41f22881272d5b923f12b85d9fcc2c9d0
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
---
 cmake/QtFeature.cmake | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/cmake/QtFeature.cmake b/cmake/QtFeature.cmake
index 6a26824bd49..c0e1313a459 100644
--- a/cmake/QtFeature.cmake
+++ b/cmake/QtFeature.cmake
@@ -320,7 +320,11 @@ function(qt_evaluate_qmake_config_values key)
     set(expected "NOT")
     if (arg_NEGATE)
         set(expected "")
-        string(PREPEND arg_NAME "no_")
+        if(arg_NAME MATCHES "^no_(.*)")
+            set(arg_NAME "${CMAKE_MATCH_1}")
+        else()
+            string(PREPEND arg_NAME "no_")
+        endif()
     endif()
 
     # The feature condition is false, there is no need to export any config values.