dbus library search rules for qdbus

[Ralf Habacker]

Hi,

Recent dbus cmake build system (and binary packages) uses different dll 
names for release/debug build (dbus-1/dbus1d) and compiler  (mingw: 
libdbus-1(d).dll msvc: dbus-1(d).dll) 

While linking the dbus libraries to the qdbus module using the import 
libraries (which is indicated by the QT_LINKED_LIBDBUS macro) qt honors 
all the above mentioned dll naming scheme.

In the opposite the newly added qdbus feature to load the dbus library 
dynamically breaks debug support because qdbus only loads dbus-1.dll 
(the msvc release dll) regardless of compiler and compile mode.

Unfortunally this makes it impossible to debug qdbus with dbus. The 
appended patch fixes this problem according to the following rules:
/*
                 dbus library searching rules as already implemented for 
linked qdbus (with extension [1],[2])
                 
                   os       compiler        compile type    library 
versions    library name
                win32       gcc               debug                     
---                     libdbus-1d, libdbus-1[1], dbus-1[2]
                win32       gcc               release                   
---                      libdbus-1, dbus-1 [2]
                win32       msvc            debug                      
---                    dbus-1d, dbus-1[1]
                win32       msvc            release                    
---                     dbus-1
                unix          gcc              
debug                      3,2                    dbus-1
                unix          gcc              
release                    3,2                     dbus-1
                
                [1] when qdbus is compiled as debug release and there is 
no dbus debug library, the dbus release library will be taken
                [2] when no gcc debug or release dbus library is 
available a msvc dbus release build will be taken.
*/

Does anyone see a problem with this rules ?

Ralf


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