[CMake] FindQt4.cmake and debug/release libs

[Brad King]

Alexander Neundorf wrote:
> Hi, 
>  
> currently FindQt4.cmake defines the following variables: 
> QT_QTFOO_LIBRARY_DEBUG: the debug version of the QtFoo library  
> QT_QTFOO_LIBRARY: the release version of the QtFoo library if it was 
> found, otherwise also the debug version 
>  
> I'd like to change it to: 
> QT_QTFOO_LIBRARY_DEBUG: the debug version of the QtFoo library 
> QT_QTFOO_LIBRARY_RELEASE: the release version of the QtFoo library 
> QT_QTFOO_LIBRARIES: the debug version of QtFoo if only the debug version 
> has been found, the release version of QtFoo if only the release version 
> has been found, and  "optimized ${QT_QTFOO_LIBRARY_RELEASE} debug 
> ${QT_QTFOO_LIBRARY_DEBUG}" if both have been found. 
>  
> What do you think ? 
>  
> This would also mean that QT_QTFOO_LIBRARY wouldn't exist anymore. Does 
> it have to be kept for compatibility ? If yes, should it behave like 
> QT_QTFOO_LIBRARY_RELEASE or QT_QTFOO_LIBRARIES ? 

That sounds fine to me.  For compatibility set QT_QTFOO_LIBRARY to the 
value of QT_QTFOO_LIBRARY_RELEASE after it is found, but only if 
CMAKE_BACKWARDS_COMPATIBILITY is set to 2.2 or earlier.

-Brad