[CMake] Build cmake dependency

[Scott Bloom]

You may want to move this to https://discourse.cmake.org/, as this mailing list is going away (note, Im not with the cmake org at all.. just a user..)

That said,typically, when a CMake based library is included into a larger cmake project, it will set some variables.  SUBLIB_DIR for instance..  so you would then, in the top project do something like

include_directories( ${SUBLIB_DIR }/include )

If it doesn't create the directory, I would do the following

set( SUBLIB_DIR ${CMAKE_SOURCE_DIR}/SubLibName )
add_subdirectory( ${SUBLIB_DIR} )

for the output of the library, you can in your executable target_link_libraries directly list the target project name

target_link_libraries( MyExe SubLib )

Scott

-----Original Message-----
From: CMake [mailto:cmake-bounces at cmake.org] On Behalf Of Pietro Paolini
Sent: Friday, February 28, 2020 1:19 AM
To: cmake at cmake.org
Subject: [CMake] Build cmake dependency

Hi all,

I really cannot say I am an expert with CMake however I have been using it for a while now, even though mainly by copying and pasting snippet of code from the web therefore not understanding things properly.

I am working on a project which depends on a libary which is itself built using CMake, I'd like my project to build the library itself during its own build and I can successfully do that by adding the folder to the root CMakeLists.txt of my current prject, however I couldn't find a way to include its headers and link the shared object.

I had to resort to a bash script which compiles and installs the dependency in a pre-defined location and add such location to my project's CMake's setting file through the use of include_directories()/link_directories(). It works but I'd like to get CMake to do what I want and not having to find workaroun, I am pretty confident I am missing something here, is there a better way to do that ?


Thanks,
Pietro


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