RE: Debug vs release plugin and lib

[David D. <dav...@jr...>]

=20
> -----Original Message-----
> On Wednesday 21 February 2007 15:54, Jacob St=F8ren wrote:
=20
> > I found out that the default build system makes it=20
> impossible to run a=20
> > debug Qt application using the release built Qwt.
>=20
> I never heard of such a limitation and if it is true it would=20
> be impossible to use any release library in an application=20
> built debug mode.

I think that this is normal Windows behaviour. Certainly with VC++ 6 =
this
can be the case.

Windows has several different memory managers (6 I think). If you =
allocate
memory with one memory manager then you must free it with the same one. =
If
the Qwt library allocates memory which is then deleted by Qt (eg in the
QObject destructor) then Qt and Qwt must be compiled using the same =
memory
manager. Since release and debug modes use different memory managers you =
can
only use a release library in a debug mode application if the =
application
does not delete memory allocated in the library.=20

Regards

David