undefine variable in RELEASE.local

["Pearson, Matthew R. via Tech-talk" <tech-talk at aps.anl.gov>]

Hi,

I've been attempting to build a set of support modules by leaving the RELEASE files unchanged and only specifying what we need in RELEASE.local files.

So up until now I have only ever built asyn with a single dependency on base, and so my asyn RELEASE.local contains:

EPICS_BASE=/home/controls/common/base/main

However this fails because the standard asyn RELEASE file sets:

# SEQ is required for testIPServer
SNCSEQ=$(SUPPORT)/seq-2-2-5

And so the asyn build fails because that particular test expects SNCSEQ.

To fix that in my asyn RELEASE.local I can do:

SNCSEQ=
EPICS_BASE=/home/controls/common/base/main

But that causes problems on downstream builds that also use SNCSEQ due to CHECK_RELEASE.

I can fix that by doing this instead:

undefine SNCSEQ
EPICS_BASE=/home/controls/common/base/main

Although this causes errors like these when building asyn:

make[2]: Entering directory '/home/controls/common/asyn/main/iocBoot/ioctest'
perl -CSD /home/controls/common/base/main/bin/linux-x86_64/convertRelease.pl -t /home/controls/common/asyn/main envPaths
Use of uninitialized value $iocpath in substitution (s///) at /home/controls/common/base/main/bin/linux-x86_64/convertRelease.pl line 220.
Use of uninitialized value $path in -d at /home/controls/common/base/main/bin/linux-x86_64/convertRelease.pl line 221.

Do you know what's causing these errors? I suppose the script just isn't silently dealing with the 'undefine' syntax? However, it seems to complete fine, as the envPaths file is correct:

epicsEnvSet("IOC","ioctest")
epicsEnvSet("TOP","/home/controls/common/asyn/main")
epicsEnvSet("EPICS_BASE","/home/controls/common/base/main")

Cheers,
Matt


STS Integrated Control System Lead Engineer
Spallation Neutron Source
Oak Ridge National Lab