[eccp/Linux] error #29 on #if _RWSTD_INSTANTIATE

The library fails to build with EDG eccp 3.10 and 3.9 (and likely prior versions as well) with the errors below, repeated in many translation units:

generating dependencies for $(TOPDIR)/src/ti_wtime_put.cpp
eccp -M -I$(TOPDIR)/include/ansi -D_RWSTDDEBUG -I$(TOPDIR)/include -I$(BUILDDIR)/include -A -x --template_directory=$(BUILDDIR)/lib -g --display_error_number --remarks --diag_suppress 193,236,340,401,261,479,487,678,679,815 $(TOPDIR)/src/ti_wtime_put.cpp
"$(TOPDIR)/include/string", line 1601: error #29:
expected an expression
#if _RWSTD_INSTANTIATE (_BASIC_STRING, _WCHAR_T)
^

"$(TOPDIR)/include/streambuf", line 534: error #29:
expected an expression
#if _RWSTD_INSTANTIATE (_BASIC_STREAMBUF, _WCHAR_T)
^

"$(TOPDIR)/include/loc/_time_put.h", line 126: error #29:
expected an expression
#if _RWSTD_INSTANTIATE (_TIME_PUT, _WCHAR_T)
^

3 errors detected in the compilation of "$(TOPDIR)/src/ti_wtime_put.cpp".