Nope, the same behavior.
ZM has OS detection block, I added there
set(CMAKE_REQUIRED_INCLUDES "/usr/include" "/usr/local/include") if system is BSD.

Now I have
-- Looking for libv4l1-videodev.h
-- Looking for libv4l1-videodev.h - found
-- Looking for linux/videodev2.h
-- Looking for linux/videodev2.h - found

and tests are passed/entire project is builded. Is hardcoded directory includes considered evil and I should find (read - ask here :)) ) better solution ?

On 24.04.2016 12:00, Matthew D. Fuller wrote:
On Sun, Apr 24, 2016 at 11:44:31AM +0300 I heard the voice of
abi, and lo! it spake thus:
I go the first way, however it seems that include directory is ignored
in include tests.
Oh, right.  That's annoying.


Should I try CMAKE_REQUIRED_INCLUDES ? However, I don't know the
effect of this on linux systems.
I'd skip worrying about that for now.  Get a patch working for the
port, then worry later about if/how to upstream it.

     get_property(idirs DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY 
INCLUDE_DIRECTORIES)
     set(CMAKE_REQUIRED_INCLUDES ${idirs})

seems like it might do the trick.



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