[CMake] Making variables visible in ccmake

[Dorier, Matthieu]

Ah then maybe I don't understand correctly what is supposed to be displayed by ccmake.


In general, how can I have in the ccmake screen some variables displayed to configure some paths to some libraries?


Thanks,


Matthieu

________________________________
From: Eric Noulard <eric.noulard at gmail.com>
Sent: Friday, September 28, 2018 11:30:31 AM
To: Dorier, Matthieu
Cc: CMake Mailinglist
Subject: Re: [CMake] Making variables visible in ccmake



Le ven. 28 sept. 2018 à 11:59, Dorier, Matthieu <mdorier at anl.gov<mailto:mdorier at anl.gov>> a écrit :

Hi,


How do I make a variable visible in the ccmake tool?

For example I would like the user to be able to edit BOOST_ROOT when calling ccmake, how can I do that?


Right now all I see when first running ccmake is "EMPTY_CACHE", and when typing "c" to configure (which fails because some variables aren't properly set) then "e" to exit, I see the variables I have defined with "option", and I can toggle those, but I don't see other variables. I have tried the following:


if(NOT DEFINED BOOST_ROOT)
  set(BOOST_ROOT "/usr" CACHE PATH "Root of the Boost installation")
endif(NOT DEFINED BOOST_ROOT)


But I still don't see it in the list of variables.

CACHE variables are "Advanced Variables" which are not displayed unless you toggle display advanced var in either ccmake or cmake-gui.
In ccmake you have to hit 't' in order to see advanced variables.



Additionally, is there a way to have set of variables (namely the options, as well as things like BOOST_ROOT, CMAKE_CXX_COMPILER, CMAKE_C_COMPILER) show up when first calling ccmake, instead of EMPTY_CACHE?

I don't know, CMAKE_<lang>_COMPILER is not meant to be set with cmake UI, they ought to be set in a toolchain or outside.
As noted in CMakeForceCompiler module you should not force them, use toolchain or env var before calling cmake* tool.


--
Eric
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