[CMake] Linking static targets from sibling directories

[Scott MacVicar]

Hi,

I've been converting a current autoconf project to use CMake, the layout is such that there is a root directory and 3 sub directories containing various parts of the project.

filters and nls build two static libs and mbfl builds a third static lib that links to the previous two.

root
--filters
--mbfl
--nls

mbfl contains
target_link_libraries(mbfl mbfl_filters)
target_link_libraries(mbfl mbfl_nls)

but refuses to link the static libraries which are targets from the subfolders.

Entire repository is available at http://github.com/scottmac/libmbfl

I could convert it to be built at one single lib in one go but would rather keep parity with the autoconf equivalents.

Any help or pointers would be appreciated.

Scott
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