From 9ad537254a8c9e843cfc468bc0614f3c17a646cd Mon Sep 17 00:00:00 2001
From: Alexey Edelev <alexey.edelev@qt.io>
Date: Wed, 17 Jan 2024 07:40:48 +0100
Subject: [PATCH] Cut off the IMPORTED targets from the sync header
 dependencies

IMPORTED targets obviously have nothing to sync. So we should ignore
them when collecting dependencies for header sync.

Pick-to: 6.6 6.5
Change-Id: Ief68ff5eb2eb13a3fe1608445e8f5e6abb5971b4
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
(cherry picked from commit 868e91474c085bd3bf8c5635fc069731afc2e44a)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 cmake/QtTargetHelpers.cmake | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/cmake/QtTargetHelpers.cmake b/cmake/QtTargetHelpers.cmake
index 9757a8e7fc5..71ffde93c0f 100644
--- a/cmake/QtTargetHelpers.cmake
+++ b/cmake/QtTargetHelpers.cmake
@@ -121,13 +121,16 @@ function(qt_internal_extend_target target)
             # heuristic way of building the dependency tree between the _sync_headers targets of
             # different Qt modules.
             if(TARGET "${lib}")
-                get_target_property(is_private ${lib} _qt_is_private_module)
-                if(is_private)
-                    get_target_property(lib ${lib} _qt_public_module_target_name)
+                get_target_property(is_imported ${lib} IMPORTED)
+                if(NOT is_imported)
+                    get_target_property(is_private ${lib} _qt_is_private_module)
+                    if(is_private)
+                        get_target_property(lib ${lib} _qt_public_module_target_name)
+                    endif()
+                    set(out_genex "$<TARGET_PROPERTY:${lib},_qt_internal_sync_headers_target>")
+                    set_property(TARGET ${target}
+                        APPEND PROPERTY _qt_internal_sync_headers_deps "${out_genex}")
                 endif()
-                set(out_genex "$<TARGET_PROPERTY:${lib},_qt_internal_sync_headers_target>")
-                set_property(TARGET ${target}
-                    APPEND PROPERTY _qt_internal_sync_headers_deps "${out_genex}")
             endif()
         endforeach()