Build base 3.15.8 on RHEL 9

[Mark Rivers via Tech-talk <tech-talk at aps.anl.gov>]

I have an EPICS client that needs base 3.15.  I try to build 3.15.8 on RHEL 9 and I get these errors:

In file included from ../../../../../../src/ca/legacy/pcas/generic/casCoreClient.h:20,

                 from ../../../../../../src/ca/legacy/pcas/generic/casCoreClient.cc:19:

../../../../../../src/ca/legacy/pcas/generic/caServerI.h: At global scope:

../../../../../../src/ca/legacy/pcas/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/ca/legacy/pcas/generic/caServerI.h:33,

                 from ../../../../../../src/ca/legacy/pcas/generic/casCoreClient.h:20,

                 from ../../../../../../src/ca/legacy/pcas/generic/casCoreClient.cc:19:

../../../../../../src/ca/legacy/pcas/generic/ioBlocked.h:43:7: note: declared private here

   43 | class ioBlockedList : private tsDLList<ioBlocked> {

      |       ^~~~~~~~~~~~~

In file included from ../../../../../../src/ca/legacy/pcas/generic/casCoreClient.h:20,

                 from ../../../../../../src/ca/legacy/pcas/generic/casCoreClient.cc:19:

../../../../../../src/ca/legacy/pcas/generic/caServerI.h:92:5: error: ‘class tsDLList<ioBlocked> tsDLList<ioBlocked>::tsDLList’ is private within this context

   92 |     tsDLList < casIntfOS > intfList;

      |     ^~~~~~~~~~~~~~~~~~~~~~

What do I need to do?

Thanks,

Mark