[CMake] cmake buried in subdirectory?

[J Decker]

On Wed, Oct 4, 2017 at 6:22 PM, Randy Heiland <randy.heiland at gmail.com>
wrote:

> Thanks for the reply. In my case, I didn't even want the CMakeLists in the
> top-level dir. I didn't want to contaminate my top-level dir with anything
> related to CMake. This would avoid, for example, an accidental overwrite of
> an existing Makefile if one was to do a 'cmake .' in the the top dir.
>
> :) they could still 'cmake cmake' in the top dir :)

you could add something like

if( ${CMAKE_BINARY_DIR} STREQUAL ${CMAKE_SOURCE_DIR} )
  message( FATAL_ERROR "dont' run cmake in this directory" ) # or something
endif()

but you don't need to add the .. in the project() just in the sources added
to add_library() or add_executable()

I'd probably SET( SOURCE_ROOT ${CMAKE_SOURCE_DIR}/.. ) if it was in a
location where you were... and then add sources as...
add_executable ( mySimpleProgram ${SOURCE_ROOT}/main.c )




> It's quite possible I'm over-thinking this; I was just curious if it's
> even possible. Seems like it should be.
>



>
> -Randy
>
> On Wed, Oct 4, 2017 at 4:30 PM, J. Caleb Wherry <calebwherry at gmail.com>
> wrote:
>
>> There is no reason why this shouldn't work, I do something similar where
>> everything except my top-level CMakeLists is shoved into a subdirectory
>> (away from the src code location).
>>
>> You don't have to muck with the project macro at all, not sure what you
>> are trying to accomplish with that? That just sets the name of the project.
>>
>> All you have to be aware of is all the paths are now with respect to both
>> the CMakeLists and where ever you put your binary dir. So doing something
>> like the below allows you to reference things in your source tree
>> (depending on how far you away form the root, obviously):
>>
>> get_filename_component(SourceRoot "${CMAKE_CURRENT_SOURCE_DIR}/../../"
>> ABSOLUTE)
>>
>> The normal structure of the CMake file doesn't change, nothing special
>> has to be done with the project macro. Unless you have a more specific
>> error, that's about all the advice I have.
>>
>> -Caleb
>>
>>
>> On Wed, Oct 4, 2017 at 3:16 PM, Randy Heiland <randy.heiland at gmail.com>
>> wrote:
>>
>>> Hello,
>>>
>>> Simple question... can I/how can I keep my top-level cmake-related stuff
>>> in a subdirectory of my main project directory? E.g.:
>>>
>>> /myproj
>>>   /cmake
>>>     CMakeLists.txt
>>>
>>> and then in the /cmake, I create a /build from which I attempt:  cmake ..
>>>
>>> I tried something as simple as this in my CMakeLists.txt, but it didn't
>>> seem to work:
>>> project (../myproj)
>>>
>>>
>>> The primary reason I'd like to do this is to hide/make optional the
>>> cmake build approach (and keep in place an existing/traditional Makefile in
>>> the parent directory). Play along...
>>>
>>> thanks, Randy
>>>
>>> --
>>>
>>> Powered by www.kitware.com
>>>
>>> Please keep messages on-topic and check the CMake FAQ at:
>>> http://www.cmake.org/Wiki/CMake_FAQ
>>>
>>> Kitware offers various services to support the CMake community. For more
>>> information on each offering, please visit:
>>>
>>> CMake Support: http://cmake.org/cmake/help/support.html
>>> CMake Consulting: http://cmake.org/cmake/help/consulting.html
>>> CMake Training Courses: http://cmake.org/cmake/help/training.html
>>>
>>> Visit other Kitware open-source projects at
>>> http://www.kitware.com/opensource/opensource.html
>>>
>>> Follow this link to subscribe/unsubscribe:
>>> http://public.kitware.com/mailman/listinfo/cmake
>>>
>>
>>
>>
>> --
>> J. Caleb Wherry
>> *Scientific Software Engineer*
>>
>> <http://www.calebwherry.com>
>> http://www.calebwherry.com
>> +1 (615) 708-5651 <(615)%20708-5651>
>> calebwherry at gmail.com
>>
>
>
> --
>
> Powered by www.kitware.com
>
> Please keep messages on-topic and check the CMake FAQ at:
> http://www.cmake.org/Wiki/CMake_FAQ
>
> Kitware offers various services to support the CMake community. For more
> information on each offering, please visit:
>
> CMake Support: http://cmake.org/cmake/help/support.html
> CMake Consulting: http://cmake.org/cmake/help/consulting.html
> CMake Training Courses: http://cmake.org/cmake/help/training.html
>
> Visit other Kitware open-source projects at http://www.kitware.com/
> opensource/opensource.html
>
> Follow this link to subscribe/unsubscribe:
> http://public.kitware.com/mailman/listinfo/cmake
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/cmake/attachments/20171004/8562cbd5/attachment-0001.html>