[CMake] [cmake-developers] CMake IR

[Daniel Schepler]

It doesn't look like it's documented, at least in the command line --help-variable.

It's a special case, which I think works for a lot of the build flag related cache variables (though for a lot of the others, you probably need to put values in e.g. a c_flag_overrides.cmake included by setting CMAKE_USER_MAKE_RULES_OVERRIDE so they can be dependent on detected platform/compiler settings).
-- 
Daniel Schepler
________________________________________
From: daniel.r.kegel at gmail.com [daniel.r.kegel at gmail.com] on behalf of Dan Kegel [dank at kegel.com]
Sent: Friday, July 31, 2015 10:21 AM
To: Daniel Schepler
Cc: cmake
Subject: Re: [CMake] [cmake-developers] CMake IR

On Fri, Jul 31, 2015 at 11:44 AM, Daniel Schepler
<dschepler at scalable-networks.com> wrote:
>> Here's another example from real life.  Maybe I'm just being an idiot,
>> but this is what I had to do to set a default:
>>
>> IF(DEFINED CMAKE_BUILD_TYPE AND (NOT ${CMAKE_BUILD_TYPE} STREQUAL "None"))
>>    SET(CMAKE_BUILD_TYPE ${CMAKE_BUILD_TYPE} CACHE STRING "Choose the
>> type of build, options are: Debug Release RelWithDebInfo")
>> ELSE()
>>    SET(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING "Choose the type
>> of build, options are: Debug Release RelWithDebInfo" FORCE)
>> ENDIF()
>>
>> Can someone give me the proper one-line way to set a default for
>> CMAKE_BUILD_TYPE, or is this an authentic problem?
>
> This seems to work for me:
> set(CMAKE_BUILD_TYPE_INIT RelWithDebInfo)

Wow, never heard of that variable, thanks
Is that documented?
Can you just slam _INIT on the end of any cache variable to give it a
default value, or is that a special case?
- Dan