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Purpose of visibility_control files in ros packages

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asked 2020-09-16 19:45:39 -0500

Jaehyun Shim

21 ●5 ●8 ●8 https://github.com/rjshim

Hi,

I wonder how those visibility_control files work in a ROS system. Here is the link to the visibility_control file from ros2/demo. (https://github.com/ros2/demos/blob/ma...)

I can also see many other ROS working groups are using the same visibility control files so I hope I can also understand the purpose of it properly and utilize them in my projects.

Thank you in advance, Ryan

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answered 2020-09-21 06:53:00 -0500

Mbuijs

247 ●7 ●17 ●16

There's a link in those header files that refers to the GCC wiki: https://gcc.gnu.org/wiki/Visibility

As far as I know the macro's defined in these files help in determining when a function (or class / struct) should be internal or external when generating a (shared) library. When getting started, you can safely ignore these macro's.

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Asked: 2020-09-16 19:45:39 -0500

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Last updated: Sep 21 '20

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Purpose of visibility_control files in ros packages