cmake, missing feature set_directory_property?

Question

I have a cmake project and I want to do the following :

set_directory_property(DIRECTORY glfw BUILD_SHARED_LIBS ON)
add_subdirectory(glfw)

I want to force the BUILD_SHARED_LIBS to be ON, but only in the scope of the 'glfw' sub directory. Without touching the glfw cmake files.

Is it possible ?

There is no set_directory_property, only a get_directory_property :-(

Thanks

There is command [set_directory_properties](https://cmake.org/cmake/help/v3.7/command/set_directory_properties.html) — Tsyvarev, Feb 01 '18 at 09:09
Possible duplicate of [Passing variables down to subdirectory only](https://stackoverflow.com/questions/30985215/passing-variables-down-to-subdirectory-only) — Florian, Feb 01 '18 at 09:10

score 2 · Answer 1 · answered Feb 01 '18 at 09:09

2

The BUILD_SHARED_LIBS is a variable not a directory property. And the VARIABLES directory property is read-only.

So in your case you just do:

set(BUILD_SHARED_LIBS ON)
add_subdirectory(glfw)
unset(BUILD_SHARED_LIBS)

answered Feb 01 '18 at 09:09

Florian

Thanks but it does not work. It seems cmake still interpret BUILD_SHARED_LIBS at OFF ! – CDZ Feb 01 '18 at 10:02

score 0 · Answer 2 · answered Feb 01 '18 at 10:35

0

I found a solution, I had to use the following :

set(BUILD_SHARED_LIBS ON CACHE "" INTERNAL FORCE)
add_subdirectory(glfw)
set(BUILD_SHARED_LIBS OFF CACHE "" INTERNAL FORCE)

Thanks for your help !

answered Feb 01 '18 at 10:35

CDZ

2 Answers2