[CMake] Debug logging of items

[Eric Doenges]

I don't know about the targets, but you can get all variables currently 
defined for a directory by reading the VARIABLES property, e.g.

get_property(_variables DIRECTORY "${CMAKE_SOURCE_DIR}" PROPERTY VARIABLES)

I use this to dump the variables into a file so I can see with which 
variable settings my build directory was configured with.

With kind regards,
Eric

Am 20.09.19 um 14:49 schrieb Cornelis Bockemühl:
>
> Right now I am fighting my way through large amounts of CMake code 
> (actually working on a ParaView custom application with many own 
> plugins, views, domains, property widgets etc. etc.), and it is 
> sometimes really not easy not to lose track completely! Sometimes I am 
> happy to be back into complex C++ programming - because I see much 
> more logic in the entire thing. And it is of course no news that CMake 
> code is not famous for being easy to debug.
>
> Anyway, I am dreaming of some "simple" features that would sometimes 
> help a lot, and it is all about "dumping" some kind of data. Actually 
> this is for me often also the favorite way to debug C++ code: just 
> print out the values of variables, arrays, etc. - e.g. if setting a 
> breakpoint in the debugger is difficult because you are interested 
> only in the 928773th occurrence of a certain piece of code (without 
> even knowing that number...).
>
> Accordingly in CMake code I am working a lot with the message() 
> function - but within that code the problem is often that you do not 
> even know which variables would be available at all!
>
> Thus functions like would be really great to have:
>
>     “give me a list of all currently known targets”
>     “give me a list of all properties of a target”
>     “give me a list of all currently defined variables”
>     etc.
>
> What I do not know is: Are this things that already exist - in which 
> case I would be happy if somebody could tell me how to find them! -, 
> or are these functions rather "feature requests"?
>
> In fact I can hardly believe that I am the first with such kind of 
> dreams, so my hope is still that they already exist somewhere...
>
> --
> Cornelis Bockemühl
> mail: cornelis at bockemuehl.ch
> phone: +41 79 644 9943
> Basel, Switzerland
> https://cobo.bockemuehl.ch
> <https://cobo.bockemuehl.ch>
>
>
-- 

*Dr. Eric Dönges*
Senior Software Engineer

MVTec Software GmbH | Arnulfstr. 205 | 80634 Munich | Germany
doenges at mvtec.com <mailto:mustermann at mvtec.com> | Tel: +49 89 457 695-0 
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