[RFC] cmake modules and keeping source compatibility

[Alexander Neundorf]

On Friday 18 January 2008, Sebastian Trüg wrote:
> As for Soprano is the attached patch ok?

I'd prefer something like this in FindSoprano.cmake:

IF(NOT SOPRANO_MIN_VERSION)
   SET(SOPRANO_MIN_VERSION "1.99")
ENDIF(NOT SOPRANO_MIN_VERSION)

if(SOPRANO_VERSION STRLESS "${SOPRANO_MIN_VERSION}")
...


This way without changing anything in a 3rd party app the module behaves 
exactly as with KDE 4.0.0, and if a "user" needs another version he can set 
the version before:

set(SOPRANO_MIN_VERSION "2.0")
find_package(Soprano)

find_package() must only fail with FATAL_ERROR or SEND_ERROR if REQUIRED was 
used in the find_package() call. Otherwise it's enough if SOPRANO_FOUND is 
not set.

Independent from this, I'd still like to get some comments on the cmake source 
compat. issue.

Bye
Alex