Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Fri, 12 Aug 2016 10:55:41 -0500

Hi again Stefen,

On 08/12/2016 12:37 AM, Stefen Paul wrote:
> Is there a way to include device support globally (at the EPICS base
> level) so that I do not need to included it every time at the individual
> application level and the support is automatically available to all the
> subsequently created applications made using makeBaseApp.

There are several ways you could do this.

1. The simplest way might be to add your device support to Base itself,
but I wouldn't really recommend that as you then have to repeat the
process every time you want to install a new version of Base.

2. The standard way to provide common device support types is to build
them as a support module which all your IOC applications build against.
The module creates a library with its compiled device support C files
in, and also provides the related DBD files. IOC applications then point
to this module in their configure/RELEASE file, and in their
src/Makefile they specify that the support DBD file be included in the
IOC's DBD file, and that the IOC binary be linked against the support
library. See almost any available support module for examples on how to
do this.

3. If you want to simplify method 2 above even further you can provide
your own template(s) for the makeBaseApp.pl script to use which already
have the module integrated (i.e. the above steps have already been
done). This is less commonly done and I don't think we have written
instructions on how to actually do it, but the functionality is there if
you want it (ask for help on tech-talk if you want to try this).

- Andrew

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System