For nmake and VS projects we added the NDEBUG define for the release
configuration unconditionally within the qmake generators. To undefine
it, users had to use a nasty work-around.
Now, define NDEBUG within the MSVC mkspecs. In order to do that we
introduce the DEFINES_RELEASE and DEFINES_DEBUG variables that are
merged into DEFINES in default_pre.prf.
Users can unset NDEBUG by writing
DEFINES -= NDEBUG
in their .pro file.
Note that DEFINES_RELEASE and DEFINES_DEBUG are merged in
default_pre.prf in order to give extra compilers (like moc) the chance
to see the fully resolved DEFINES variable. This is different from the
QMAKE_CFLAGS_(DEBUG|RELEASE) variables that get merged in default_post.prf.
Fixes: QTBUG-78071
Change-Id: I381770a1d2f974fbae9b09a2254e3f2fc7842b68
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
1456b8091a