[CMake] automatically re-generating makefiles

[Matthew Woehlke]

Bill Hoffman wrote:
> Matthew Woehlke wrote:
>>> Makefile : cmake_check_build_system
>>
>> Shouldn't this rather be:
>> Makefile: <list of CMakeLists.txt, etc>
>>     cmake_check_build_system
>> ?
>>
>> ...in which case, the only thing that should get checked is if the 
>> CMakeLists.txt are newer than the Makefile. So in most cases this 
>> should be fast.
>
> We need to run cmake_check_build_system first because make can not 
> handle missing depend .h files.

I'm not saying to stop doing anything that is currently done.

AFAICT, right now the Makefile itself does not have any dependencies; it 
seems that adding 'Makefile: <build system files>' with the rule from 
cmake_check_build_system would fix the original problem. So the question 
is if running cmake_check_build_system twice in a row can either be 
eliminated or kept reasonable.

-- 
Matthew
Please do not quote my e-mail address unobfuscated in message bodies.
-- 
You're on your own for the pony. -- Richard Hughes, on feature requests