[omniORB] omni4 solaris build failure

[jon@totient.demon.co.uk]

get this error on snapshot omniorb 4 2001-11-14

making export in src/lib/omniORB/orbcore...
gmake[3]: Entering directory `/sw/play/corba/omni/src/lib/omniORB/orbcore'
CC -c -O2  -I.. -I./.. -I../include -I./../include -DUsePthread -D_REENTRANT -mt -DUSE_omniORB_logStream -D_OMNIORB_LIBRARY -DCONFIG_DEFAULT_LOCATION='"/etc/omniORB.cfg"' -DCONFIG_ENV='"OMNIORB_CONFIG"' -DUnixArchitecture -DBSD_COMP    -I. -I. -I../../../../include -D__sparc__ -D__sunos__ -D__OSVERSION__=5 -o static/anonObject.o anonObject.cc
"../../../../include/omniORB4/CORBA_Policy.h", line 149: Error: _pd_seq is not accessible from CORBA::PolicyList_out::PolicyList_out(CORBA::PolicyList_var&).

it looks like it's the compiler to me : which is
CC: WorkShop Compilers 4.2 18 Sep 1997 C++ 4.2 patch 104631-04


any other ideas?