[CMake] Saving/Restoring link_directories and link_libraries

[Theodore Papadopoulo]

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	Hi,

I'm using a library XXX which comes with UseXXX.cmake and
XXXConfig.cmake files (which I cannot touch as they come from linux
distributions).

Unfortunately, the XXXConfig.cmake directly calls
include_directories(), add_definitions(), link_directories() and
link_libraries().

The last two are particularly unwelcome as they force the link of all
the executables with the XXX libraries whereas I only need them in one
such executable.

So my question is, is there a way/trick to save the state of these 4
quantities (link_directories, definitions, link_directories and
link_libraries) before the FindPackage(XXX) call and to restore to
these saved values after the call.

I hope for sthg like a property but I cannot find it (even looking at
the sources).

Otherwise, the only simple option I have is to call the
FindPackage(XXX) at the latest possible time. But this is rather
fragile IMHO.

	Thank's a lot for any insight,

	Theo.

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