On 10/20/2011 05:41 PM, Robert Dailey wrote: > On Thu, Oct 20, 2011 at 2:36 AM, Rolf Eike Beer <e...@sf-mail.de > <mailto:e...@sf-mail.de>> wrote: > > > I have a function defined very high up in the directory tree at > the root > > CMakeLists file. Several levels below it, I have another > CMakeLists file > > that I call that function from. > > > > The function sets CMAKE_MFC_FLAG to 2. I notice that this flag gets > > ignored > > when it is set inside of the function in question. If I set the flag > > outside > > of the function, in the lowest level CMakeLists file, it works. This > > property seems somehow tied to the directory itself, but I can't > figure > > out > > if this is a feature or a bug. > > > > This behavior isn't very flexible as I'd like to make the details of > > configuring an MFC compatible project transparent to the lower level > > CMakeLists scripts. Hiding away the flag and how it needs to be > set is a > > big > > part of this, but I can't do it. > > > > Anyone know how I can make this work? > > A function creates a new variable scope, i.e. everything you set in > there > will be reset once you leave the function. Have a look at SET(... > PARENT_SCOPE) for this. > > > Not even that worked, unfortunately. > > Basically from my function I do: > > set( CMAKE_MFC_FLAG 2 ) > add_executable( ... ) > > Since I'm setting it right before the add_executable() call, I would > think that scope has nothing to do with it.
No, the add_executable() call does not evaluate the variable. It only gets evaluated *after* the processing of the current CMakeLists.txt file. If using set(CMAKE_MFC_FLAG 2 PARENT_SCOPE) really doesn't work, IMHO that would be a bug. The only work-around would be to use a macro instead (where you don't need the PARENT_SCOPE at all). Michael -- Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake
