Workaround to override CMake options of subdirectory
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edsiper Initial import
Signed-off-by: Eduardo Silva <eduardo@monkey.io>
Latest commit 74239ec Jan 9, 2016
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project_B Initial import Jan 8, 2016
README.md Initial import Jan 8, 2016

README.md

CMake: override subdirectory options

This is a working example to demonstrate how you can override your subdirectory options from a parent project using a simple macro, more info at:

http://edsiper.linuxchile.cl/blog/2016/01/08/cmake-override…ectory-options/

Getting started

$ cd project_B/build/
$ cmake ../

Once you run the cmake command, you will see that project_B (parent), override the options of project_A, the terminal output should looks like this:

project_B/build/] $ cmake ../
-- The C compiler identification is GNU 5.2.1
-- The CXX compiler identification is GNU 5.2.1
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- >>>>>>>> Project_A: Feature AA: OFF <<<<<<<<
-- >>>>>>>> Project_A: Feature BB: ON <<<<<<<<
-- Configuring done
-- Generating done
-- Build files have been written to: /home/edsiper/coding/cmake-options/project_B/build

The macro used to override the options is:

macro(SET_OPTION option value)
  set(${option} ${value} CACHE "" INTERNAL FORCE)
endmacro()

If this repo did some help to solve your issue, please starred it!

Eduardo Silva eduardo@monkey.io