[cmake-developers] Introducing: message(DEBUG)

[Rolf Eike Beer]

Am Samstag, 3. März 2012, 17:05:11 schrieb Yury G.  Kudryashov:
> Rolf Eike Beer wrote:
> > I have a small patch to CMake that looks like this:
> > +      if (!this->Makefile->IsOn("CMAKE_DEBUG_MESSAGES"))
> 
> I propose to print message if one of the following holds:
> * CMAKE_DEBUG_MESSAGES is true;
> * CMAKE_DEBUG_MESSAGES_FileName is true, where FileName is
> CMAKE_CURRENT_LIST_FILE's name without extension;
> * Current list file is CMakeLists.txt and
> CMAKE_DEBUG_MESSAGES_CurrentDirectory is true.
> 
> This will allow
> 
> # Turn all debug messages
> -DCMAKE_DEBUG_MESSAGES=ON
> # Turn all debug messages in FindBoost.cmake
> -DCMAKE_DEBUG_MESSAGES_FindBoost=ON
> # Turn all debug messages in mysubdir/CMakeLists.txt
> -DCMAKE_DEBUG_MESSAGES_mysubdir=ON
> # Turn all debug messages in **/CMakeLists.txt
> -DCMAKE_DEBUG_MESSAGES_CMakeLists=ON

I'm not absolutely sure if this is worth the effort. Not that it is generally a 
bad idea, but it will likely require some code. The way you simply could do 
this stuff is to just put "set(CMAKE_DEBUG_MESSAGES On)" at the beginning of 
the subdir/module you want to debug and reset it at the end.

Eike
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