[cmake-developers] Fwd: Adding macro cmake_print_variables(var1 var2 ... varN) ?

[Eric Noulard]

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---------- Forwarded message ----------
From: Eric Noulard <eric.noulard at gmail.com>
Date: 2011/12/11
Subject: Re: [cmake-developers] Adding macro
cmake_print_variables(var1 var2 ... varN) ?
To: neundorf at kde.org


2011/12/11 Alexander Neundorf <neundorf at kde.org>:
> Hi,
>
> I have a small macro/function which I need often during buildsystem debugging:
>
> function(PRINT_VARIABLES)
>   set(msg "")
>   foreach(var ${ARGN})
>      if(msg)
>         set(msg "${msg} ; ")
>      endif()
>      set(msg "${msg}${var}=\"${${var}}\"")
>   endforeach()
>   message(STATUS "${msg}")
> endfunction()
>
>
> it prints the values of the variables given as arguments.
> Example:
>
> print_variables(CMAKE_C_COMPILER
>                CMAKE_MAJOR_VERSION
>                THIS_ONE_DOES_NOT_EXIST)
>
> Gives:
> -- CMAKE_C_COMPILER="/usr/bin/gcc" ; CMAKE_MAJOR_VERSION="2" ;
> THIS_ONE_DOES_NOT_EXIST=""

pretty handy.

> Ok to add to git ?

May be in a specific separate file like

CMakeScriptsDebuggingTools.cmake

(or some less lengthy name)
one may include ?

> Or should this better be
> message(VARIABLES CMAKE_C_COMPILER
>                  CMAKE_MAJOR_VERSION
>                  THIS_ONE_DOES_NOT_EXIST)

Nope I wouldn't vote for that one.
How would you print

message(VARIABLES "BLAH " CMAKE_C_COMPILER)
and
message(VARIABLES "BLAH  CMAKE_C_COMPILER")

what you be nice as a built-in is something like

trace_var(CMAKE_C_COMPILER)

which would make the concerned VAR to be traced each time
it is touched (read or written) by a script.
That said we are far away from your initial need.

and... I'm not volunteering to develop that :-(

> Then I'll put it in extra-cmake-modules, but it seems to generic that I think
> it makes sense to have it in cmake directly.
--
Erk
Membre de l'April - « promouvoir et défendre le logiciel libre » -
http://www.april.org


-- 
Erk
Membre de l'April - « promouvoir et défendre le logiciel libre » -
http://www.april.org