[CMake] Including another CMakeLists project

[Parag Chandra]

I think you may want to try the add_subdirectory() command instead of
include(), if you truly have multiple projects that are being built by
CMake. The name suggests that it would only work with a hierarchical
directory structure, but that is not the case - you can specify absolute
paths if necessary.

On the other hand, if you need to use include() to add shared logic across
build scripts (but not actual entire projects), then it¹s helpful to think
of include() as analogous to the #include directive. I¹ve found that I
needed to condition guard the included file, something like this:

if (NOT (DEFINED Foo_cmake))
set (Foo_cmake TRUE)
# Add shared logic below, then end with:
endif ()

Hope this helps.


Parag Chandra
Software Engineer, Mobile Team
Mobile: +1.919.824.1410

 <https://ionic.com>

Ionic Security Inc.
1170 Peachtree St. NE STE 2285, Atlanta, GA 30309











On 12/10/14, 9:42 AM, "Petr Bena" <benapetr at gmail.com> wrote:

>I have 3 projects, all using cmake. When I run cmake on each of them
>and separately build them, it's all fine.
>
>When I use include() on these 2 cmake files in 1 of them, so that I
>could run only 1 cmake and then build them all using 1 make, it fails.
>
>I believe that these 3 cmakes are colliding with each other, is there
>a way to run it isolated?
>-- 
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