From a9d687c63c31b18396247c3e69e6b48211ab0ae0 Mon Sep 17 00:00:00 2001
From: Alexandru Croitor <alexandru.croitor@qt.io>
Date: Wed, 25 Nov 2020 11:50:30 +0100
Subject: CMake: Allow generating documentation for INTERFACE targets

Query the include dirs from the INTERFACE_INCLUDE_DIRECTORIES property
when generating docs for an INTERFACE library.

Amends 2db41fefa006c9aabd577eee98b8a9594d264470

Pick-to: 6.0
Task-number: QTBUG-88838
Change-Id: Ic8a454ba66b2dbc59bad883e1e0d38ebb26d0370
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
---
 cmake/QtDocsHelpers.cmake | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'cmake')

diff --git a/cmake/QtDocsHelpers.cmake b/cmake/QtDocsHelpers.cmake
index 8e4bd28918..b5b734f5c4 100644
--- a/cmake/QtDocsHelpers.cmake
+++ b/cmake/QtDocsHelpers.cmake
@@ -54,8 +54,15 @@ function(qt_internal_add_docs)
     # Generate include dir list
     set(target_include_dirs_file "${doc_output_dir}/$<CONFIG>/includes.txt")
 
-    set(include_paths_property "$<TARGET_PROPERTY:${target},INCLUDE_DIRECTORIES>")
-    if (NOT target_type STREQUAL "INTERFACE_LIBRARY" AND NOT target_type STREQUAL "UTILITY")
+
+    set(prop_prefix "")
+    if(target_type STREQUAL "INTERFACE_LIBRARY")
+        set(prop_prefix "INTERFACE_")
+    endif()
+    set(include_path_prop "${prop_prefix}INCLUDE_DIRECTORIES")
+
+    set(include_paths_property "$<TARGET_PROPERTY:${target},${include_path_prop}>")
+    if (NOT target_type STREQUAL "UTILITY")
         file(GENERATE
             OUTPUT ${target_include_dirs_file}
             CONTENT "-I$<JOIN:${include_paths_property},\n-I>"
-- 
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