[CMake] Determine dependency between targets

[Angeliki Chrysochou]

Hi Jörg,

I am not sure if there is a way to do this via cmake, maybe there is and I
don't know it, but I think you need to keep an eye on such things
"manually" in a way. You could use ldd or readelf to see the exact
dependencies of a library in linux.

All the best,
Angeliki



On Wed, Jul 16, 2014 at 5:37 PM, Jörg Kreuzberger <j.kreuzberger at procitec.de
> wrote:

> Hi!
>
> i am looking for a way to determine REAL LINKER dependencies between an
> application and static libraries for use with gcc.
>
> the include dependencies and cmake dependencies are quite good to
> determine.
>
> For the linker is more or less the question, against which libraries i
> should link. This is done more or less by "try and error".
>
> eg. app depends on lib2. This lib depends on lib1.
> so in cmake i would link against lib2 and lib1
>
> ok, so i add a dependency (target_link_libraries( lib2 lib1) and link app
> only agains lib2.
>
> But if the link dependency changes ( lib2 does not require to link against
> lib1 any more), how can i detect it to remove the target_link_libraries( ..
> ) entry from lib2 ?
>
> Or the other way around, if i use only PARTS of lib2 that does not require
> to link to lib1 (stripping -ffunctions-sections), how can i determine that?
>
> Greetz,
> Joerg
>
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