Experimental Physics and
Industrial Control System

"Hu, Yong via Tech-talk" <tech-talk at aps.anl.gov> · Wed, 21 Apr 2021 14:43:37 +0000

Thanks, Andrew and Michael! That is exactly the cause and solution. 

Sorry to hijack this thread. What I have done with '/usr/lib/epics' is related to my experiment on building RPM packages on Red Hat 8. There were discussions about RPM on Tech-Talk, such as https://epics.anl.gov/tech-talk/2018/msg02082.php 

Has any facility built, smoothly deployed and happily used RPM packages for EPICS installation of the base and popular support modules (seq, asyn, motor, streamDevice, etc.)? Please share your repositories (or building rules / specs) and your experience. Thank you!

Yong

On 4/21/21, 1:03 AM, "Michael Davidsaver" <mdavidsaver at gmail.com> wrote:

    On 4/20/21 4:04 PM, Johnson, Andrew N. via Tech-talk wrote:
    > Hi Yong,
    > 
    > I don’t think it’s actually possible to install both Base and SNCSEQ into the same INSTALL_LOCATION (i.e. into your /usr/lib/epics/lib path) without making some changes to the build system. The sequencer provides its own set of build rules in a file configure/RULES_BUILD which tell GNUmake how to compile .st and .stt files into .c files. That file has the same name as the file that comes with Base to tell GNUmake how to compile .c and .cpp files into .o files (and many other similar and related rules) so their contents are very different but in your layout they would be installed at the same path. Your SNCSEQ package must not have the necessary BUILD_RULES file in it, which is good because that would clash with the Base version anyway.
    > 
    > The EPICS build system automatically reads in any configure/RULES_BUILD files that it sees in any module listed in the application’s configure/RELEASE file. Thus in a normal EPICS build environment it will load the Sequencer’s rules automatically when that is listed in RELEASE.
    > 
    > The Debian packaging for the sequencer needs to work out what to do about that. Maybe in an earlier release the two RULES_BUILD files were combined into the one that came with Base itself? There have been many changes to the Base RULES_BUILD file since 3.14.12.

    The extra rules do get installed and included.

    https://github.com/epicsdeb/seq/blob/d2e9f883eb3684d5621cdcd04cb2c35d441fe59a/debian/rules#L14

    https://github.com/epicsdeb/epics-base/blob/81b977c296c865e9e370bd1cf3e8910698ad7fbf/debian/patches/0003-allow-more-flexible-makefile-config.patch#L23

    > $ make PRINT.SNC

    Should show the location of the snc executable.

    cf. https://github.com/epicsdeb/seq/blob/d2e9f883eb3684d5621cdcd04cb2c35d441fe59a/configure/RULES_BUILD#L35-L43

    > - Andrew

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System