Experimental Physics and
Industrial Control System

"J. Lewis Muir via Tech-talk" <tech-talk at aps.anl.gov> · Tue, 19 Dec 2023 17:21:07 -0600

Hello!

When compiling caputRecorder 1-7-5 against EPICS 7.0.8, I get the
following error:

  ../subMLIS.c:57:40: error: incomplete definition of type 'struct evSubscrip'

I created an issue on GitHub for this yesterday:

  https://github.com/epics-modules/caputRecorder/issues/8

Since I didn't hear anything on that issue, I'm posting here.  Is there
a preference in general for posting here first vs. creating an issue on
GitHub?

I found Michael Davidsaver's EPICS commit 3d25756

  https://github.com/epics-base/epics-base/commit/3d25756065fb0bb311321fcf226a1fad0a3e537c

which wraps the "struct evSubscrip" definition in dbChannel.h in an
"#ifdef EPICS_PRIVATE_API".  When I compile, EPICS_PRIVATE_API is not
defined, so there's no "struct evSubscrip" definition, and I think
that's why I'm getting this error.

FYI, I also found caputRecorder issue #4

  https://github.com/epics-modules/caputRecorder/issues/4

which involved a similar problem in the same source code location.

Here's the end of an example terminal session:

----
cc              -DUNIX  -Ddarwin      -O3 -g   -Wall -Werror-implicit-function-declaration     -DUSE_TYPED_RSET   -arch arm64    -fno-common  -fPIC -I. -I../O.Common -I. -I. -I.. -I../../../include/compiler/clang -I../../../include/os/Darwin -I../../../include    -I/tmp/48/opt/epics-7.0.8/include/compiler/clang -I/tmp/48/opt/epics-7.0.8/include/os/Darwin -I/tmp/48/opt/epics-7.0.8/include        -c ../subMLIS.c
../subMLIS.c:57:40: error: incomplete definition of type 'struct evSubscrip'
                pevent = (evSub *)ellNext(&pevent->node);
                                           ~~~~~~^
/tmp/48/opt/epics-7.0.8/include/ellLib.h:100:30: note: expanded from macro 'ellNext'
#define ellNext(PNODE)     ((PNODE)->next)
                             ^~~~~
/tmp/48/opt/epics-7.0.8/include/dbEvent.h:33:8: note: forward declaration of 'struct evSubscrip'
struct evSubscrip;
       ^
1 error generated.
make[4]: *** [subMLIS.o] Error 1
make[3]: *** [install.darwin-aarch64] Error 2
make[2]: *** [src.install] Error 2
make[1]: *** [caputRecorderApp.install] Error 2
make: *** [/tmp/48/opt/synapps-6.2.1/caputRecorder-R1-7-5.install] Error 2
----

Platform:

* Apple Silicon (EPICS_HOST_ARCH=darwin-aarch64)
* macOS Sonoma 14.1.1
* EPICS 7.0.8
* caputRecorder 1-7-5

Thanks!

Lewis

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System