[cmake-developers] Introducing: message(DEBUG)

[Richard Wackerbarth]

I that you are missing the fundamental usage case.
I would like to set up all of my CMake* files to enable the selection of various verbosity levels.
Then, by specifying particular command line options, I can vary the verbosity without changing any of the files.
Editing any of the files at build time is undesirable.

On Mar 3, 2012, at 8:05 AM, Rolf Eike Beer wrote:

> 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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