[ros-users] Request for Clue: OSX-specific linker flags, dependency resolution

[Nicholas Butko]

Brian, I had a question about this.

In CMake, I typically call "find_library" before calling
"target_link_library". I was wondering if there's a reason that you don't.

On the ROS OSX install site, it asks the user to add these environment
variables to .profile:

export CPATH=/opt/local/include
export LIBRARY_PATH=/opt/local/lib

They are very important to add for ROS, but they sometimes seem to interfere
with the installation of other packages. For example, I was getting some
strange interference between installing OpenCV from SVN, and the macports
version of libjpeg. More importantly, they do not seem helpful for my
non-ros CMake projects.

I am wondering now if the reason ROS requires special environment variables
is that "find_library" is not being called.

Do you have any thoughts on this?

--Nick



On Thu, Jan 13, 2011 at 3:40 PM, Brian Gerkey <gerkey at willowgarage.com>wrote:

> On Thu, Jan 13, 2011 at 1:07 PM, Jack O'Quin <jack.oquin at gmail.com> wrote:
> > I could really use some help to fix defect #4659 in camera1394:
> >
> >  https://code.ros.org/trac/ros-pkg/ticket/4659
> >
> > Briefly, it seems we need to set OS-specific link flags to resolve the
> > driver's reference to libdc1394.
>
> I haven't tried it, but if I understand the problem, then something
> like this should do it:
>
> if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
>  target_link_libraries(camera1394_node dc1394 "-framework CoreServices")
> else(CMAKE_SYSTEM_NAME MATCHES "Darwin")
>  target_link_libraries(camera1394_node dc1394)
> endif(CMAKE_SYSTEM_NAME MATCHES "Darwin")
>
>        brian.
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