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<== Date ==> <== Thread ==>
Subject: Re: EPICS Base 3.14.12.8 build error on CentOS 9
From: Maren Purves via Tech-talk <tech-talk at aps.anl.gov>
To: Chiang, Liang-Chih [江良志] <chiang.lc at nsrrc.org.tw>
Cc: "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>
Date: Wed, 5 Oct 2022 23:40:59 -1000 
Aloha,

we're still running 3.13.8, but we're also in some areas still running
CentOS5 - none of our EPICS running/communicating with (production)
systems are past CentOS6.
I am currently considering upgrading one of the CentOS5 systems, but I
think I would also want  to upgrade to at least EPICS 3.15 or 3.16,
but preferably EPICS 7.
I would consider upgrading EPICS before going from CentOS8 (or Rocky,
or whichever system you may choose) to 9.

Maren Purves,
East Asian Observatory/JCMT

On Wed, Oct 5, 2022 at 10:37 PM Chiang, Liang-Chih [江良志] via Tech-talk
<tech-talk at aps.anl.gov> wrote:
>
> Hi,
>
> I tried to build EPICS Base 3.14.12.8,
>  succeed on CentOS 8 (GCC version 8.5.0, make version 4.2.1);
>  failed on CentOS 9 (GCC version 11.3.1, make version 4.3).
>
> It seemed the error is related to C++ private/protected access specifiers.
>  I guess that the reason is because CentOS 9's newer GCC has tightened some rules.
>
> After modifying a file "src/cas/generic/ioBlocked.h", at  line 43:
>     class ioBlockedList : private tsDLList<ioBlocked> {
> changed to
>     class ioBlockedList : protected tsDLList<ioBlocked> {
>
> Then the build succeed.
>
> My question: is  the above modification a proper fix to correct this build error.
>
>
> The build log:
>
> In file included from ../../../../src/cas/generic/caServer.cc:21:
> ../../../../src/cas/generic/caServerI.h: At global scope:
> ../../../../src/cas/generic/caServerI.h:91:5: error: ‘class tsDLList<ioBlocked> tsDLList<ioBlocked>::tsDLList’ is private within this context
> 91 | tsDLList < casStrmClient > clientList;
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~
> In file included from ../../../../src/cas/generic/caServerI.h:33,
> from ../../../../src/cas/generic/caServer.cc:21:
> ../../../../src/cas/generic/ioBlocked.h:43:7: note: declared private here
> 43 | class ioBlockedList : private tsDLList<ioBlocked> {
> | ^~~~~~~~~~~~~
> In file included from ../../../../src/cas/generic/caServer.cc:21:
> ../../../../src/cas/generic/caServerI.h:92:5: error: ‘class tsDLList<ioBlocked> tsDLList<ioBlocked>::tsDLList’ is private within this context
> 92 | tsDLList < casIntfOS > intfList;
> | ^~~~~~~~~~~~~~~~~~~~~~
> In file included from ../../../../src/cas/generic/caServerI.h:33,
> from ../../../../src/cas/generic/caServer.cc:21:
> ../../../../src/cas/generic/ioBlocked.h:43:7: note: declared private here
> 43 | class ioBlockedList : private tsDLList<ioBlocked> {
> | ^~~~~~~~~~~~~
> make[4]: *** [../../../../configure/RULES_BUILD:220: caServer.o] Error 1
> make[4]: Leaving directory '/home/chiang.lc/base-3.14.12.8/src/cas/build/O.linux-x86_64'
> make[3]: *** [../../../configure/RULES_ARCHS:61: install.linux-x86_64] Error 2
> make[3]: Leaving directory '/home/chiang.lc/base-3.14.12.8/src/cas/build'
> make[2]: *** [../../configure/RULES_DIRS:83: build.install] Error 2
> make[2]: Leaving directory '/home/chiang.lc/base-3.14.12.8/src/cas'
> make[1]: *** [../configure/RULES_DIRS:83: cas.install] Error 2
> make[1]: Leaving directory '/home/chiang.lc/base-3.14.12.8/src' make: *** [configure/RULES_DIRS:83: src.install] Error 2
>
>
>
> Best regards.
>
>
>
> LiangChih Chiang
>
> NSRRC Beamline group
Replies:
Re: EPICS Base 3.14.12.8 build error on CentOS 9 Ralph Lange via Tech-talk
References:
EPICS Base 3.14.12.8 build error on CentOS 9 Chiang, Liang-Chih [江良志] via Tech-talk
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