QDoc: Move catch_conversions under src

QDoc employs a very small support library, "catch_conversions", to
provide better output for certain types when used with the Catch2
testing framework, which QDoc uses for some of its tests.

"catch_conversions" was currently kept under "tests/auto/qdoc" and its
headers were included and used directly by its sibling tests by relative
paths.

Due to a certain restructuring that is happening in QDoc, with one of
the goals, among others, being to increase the locality of QDoc-related
code under "src/qdoc", the "catch_conversions" support library is now
moved under "src/qdoc".

To allow code that depended on it to keep their usages without requiring
the addition of some relative paths from the "tests" directory to the
"src" directory, a library target, "Qt::QDocCatchConversionsPrivate" was
created for the support library.

The target can be linked-to to gain access to the
previously-directly-used headers, with include path
"catch_conversions/.*".

To allow for this specific include path to work, the internal directory
structure for "catch_conversions" was slightly modified with the
addition of some intermediate directories in between its root and the
library headers.

Targets under "tests/auto/qdoc" that used the dependency now link to it
instead. Hence, their "CMakeLists.txt" files were modified to avoid
using the dependency as an include directory and instead use
"Qt::QDocCatchConversionsPrivate" as a library.

The inclusions of the of the "catch_conversions" headers in
relevant sources was modified to respect the new "catch_conversions/.*"
path.

The root "CMakeLists.txt" file under "src/qdoc" was modified to add the
relevant library as a subdirectory.

Change-Id: Iec24ca3877a48a42a55ff406309813aa083ab23f
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/auto/qdoc/qdoc/boundaries/filesystem/catch_filepath.cpp b/tests/auto/qdoc/qdoc/boundaries/filesystem/catch_filepath.cpp
index 167aafc85..46481e4d6 100644
--- a/tests/auto/qdoc/qdoc/boundaries/filesystem/catch_filepath.cpp
+++ b/tests/auto/qdoc/qdoc/boundaries/filesystem/catch_filepath.cpp
@@ -1,7 +1,7 @@
 // Copyright (C) 2022 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
 
-#include <qdoc_catch_conversions.h>
+#include <catch_conversions/qdoc_catch_conversions.h>
 
 #include <catch/catch.hpp>