[CMake] Get linker flags / include directories for a library target

[Kai Wolf]

You can ask a CMake build target for its properties using get_target_property().
For instance, to retrieve the linker flags for a given target foo, you’d write:

    get_target_prooperty(foo_linker_flags foo LINK_FLAGS)

See [1] for a list of valid parameters.

Greetings,

Kai

[1] https://cmake.org/cmake/help/latest/manual/cmake-properties.7.html#properties-on-targets

http://kai-wolf.me
http://effective-cmake.com

> Am 20.12.2018 um 23:14 schrieb Unknown <ax487 at gmx.de>:
> 
> Dear community,
> 
> I have been wondering on multiple occasions about how to get the
> linker flags (i.e. all -llib -Ldir) and include flags (-Idir)
> for a library (i.e. a target added to the project using
> add_library) within a cmake.
> 
> There are many cases in which the flags are required, noticeably
> generating a suitable pkg-config file or creating a wrappers around
> C/C++ libraries.
> 
> I think that it should be possible to derive the flags from
> some of the target properties of the library, but I don't
> know exactly how.
> 
> Could you give me a hand?
> 
> ax487
> 
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