Move the rest of macros from qglobal to QtPreprocessorSupport

We had only three macros left in QtGlobal:
* QT_STRINGIFY
* Q_UNUSED()
* Q_UNIMPLEMENTED()

There is no obvious existing header for them, so a new header is
created.
As a drive-by: add documentation for QT_STRINGIFY.

Task-number: QTBUG-106154
Task-number: QTBUG-99313
Change-Id: I2d051dd3e69f13602893a0f0d6968419479b6c23
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 0 insertions, 10 deletions

diff --git a/src/corelib/global/qglobal.cpp b/src/corelib/global/qglobal.cpp
index e444755f1b..bc280243e4 100644
--- a/src/corelib/global/qglobal.cpp
+++ b/src/corelib/global/qglobal.cpp
@@ -227,16 +227,6 @@ void qAbort()
 // localtime() -- but not localtime_r(), which we use when threaded
 // strftime() -- not used (except in tests)
 
-/*!
-    \macro Q_UNUSED(name)
-    \relates <QtGlobal>
-
-    Indicates to the compiler that the parameter with the specified
-    \a name is not used in the body of a function. This can be used to
-    suppress compiler warnings while allowing functions to be defined
-    with meaningful parameter names in their signatures.
-*/
-
 struct QInternal_CallBackTable
 {
     QList<QList<qInternalCallback>> callbacks;