Experimental Physics and
Industrial Control System

Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov> · Sat, 18 May 2024 14:02:25 -0400

On 5/13/24 12:37, Johnson, Andrew N. via Tech-talk wrote:

IIRC the original build rules for DB_INSTALLS allow the source path to point into a support module or other external directory, whereas the DB rules were designed for generating and copying files from the local application only. Thus you can use DB_INSTALLS += $(ASYN)/db/asynRecord.dbto copy that file from your Asyn module into the IOC's $(TOP)/dbdirectory.

... so that an iocsh script need only read files from "$(TOP)/db".

I see this as an important compliment to static linking of IOC executables.
Both act to "isolate" an IOC instance from changes to files elsewhere in
the system.  Hopefully avoiding a situation where an unplanned IOC restart
picks up unexpected changes.

fyi. a concrete example of copying "save_restoreStatus.db" into "$(TOP)/db"
to avoid referencing "$(AUTOSAVE)" at runtime from st.cmd.

https://urldefense.us/v3/__https://github.com/epics-modules/mrfioc2/blob/57d848582abc7896d58a4750f73d49bf625db946/mrfApp/Db/Makefile*L21-L23__;Iw!!G_uCfscf7eWS!cJ9PfMN-HsPjs00Wg-P3QWgURu_T6SOkgNyDs2tUexc2J5r3-XYNiDtUHgk7Wi2lMVSlXHVRwd5hUUqVR945jGwnpQ$

https://urldefense.us/v3/__https://github.com/epics-modules/mrfioc2/blob/57d848582abc7896d58a4750f73d49bf625db946/iocBoot/iocevgmrm/st.cmd*L34__;Iw!!G_uCfscf7eWS!cJ9PfMN-HsPjs00Wg-P3QWgURu_T6SOkgNyDs2tUexc2J5r3-XYNiDtUHgk7Wi2lMVSlXHVRwd5hUUqVR94ArF8bVg$

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System