On Saturday 14 July 2012, 黄光成 wrote:
> my directory hierarchical is : dir1/dir2/dir3.
> In dir3's CMakeLists.txt, I define a custom variable named 'xxx' using the
> command set(xxx yyy). I want to use the variable 'xxx' in dir1's
> CMakeLists.txt, how to do that? Can export the user-defined variable?
For getting a variable one level up, using PARENT_SCOPE should work:
set(foo "abc" PARENT_SCOPE)
Calling this in dir3 directly in the CMakeLists.txt (i.e. not in a function)
would set foo in dir2.
Alternatively, you can set a variable globally, via two ways:
set(foo "abc" CACHE STRING "something..." FORCE)
or using a GLOBAL property:
in dir1/dir2/dir3/:
set_property(GLOBAL .... )
and then access it from anywhere else
get_property(GLOBAL ....)
I think setting a directory property should also work:
in dir1/dir2/dir3/:
set_property(DIRECTORY PROPERTY foo "abc")
then accessing it should also work from everywhere I think:
get_property(myFoo DIRECTORY ${CMAKE_SOURCE_DIR}/dir1/dir2/dir3 PROPERTY foo)
Alex
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