[Compaq C++ 7.1] floating point underflow warnings compiling library

• Key: STDCXX-565
• Type: Bug
• Status: Open
• Priority: Minor
• Assignee: Unassigned
• Reporter: Martin Sebor
• Component/s: Build and Installation
• Affects Version/s: 4.2.0
• Fix Version/s: 4.2.2

Description

With the latest trunk (but not with 4.1.3) we're getting the warnings below when building the library. They suggest we might have a problem in the definition of the macros.

gmake: Entering directory `$(BUILDDIR)/lib'
...
cxx -c -D_RWSTDDEBUG -D_RWSTD_SHARED_LIB -I$(TOPDIR)/include -I$(BUILDDIR)/include -x cxx -nocxxstd -std strict_ansi_errors -g -w1 -msg_disable 450 -ptr repository.ti $(TOPDIR)/src/collate.cpp
cxx: Warning: $(TOPDIR)/include/limits, line 439:
underflow occurs in evaluating this expression
_RWSTD_STATIC_FUN (long double, (min), _RWSTD_LDBL_MIN)
----^
...
cxx -c -D_RWSTDDEBUG -D_RWSTD_SHARED_LIB -I$(TOPDIR)/include -I$(BUILDDIR)/include -x cxx -nocxxstd -std strict_ansi_errors -g -w1 -msg_disable 450 -ptr repository.ti $(TOPDIR)/src/limits.cpp
cxx: Warning: $(TOPDIR)/include/limits, line 439:
underflow occurs in evaluating this expression
_RWSTD_STATIC_FUN (long double, (min), _RWSTD_LDBL_MIN)
----^
...
cxx -c -D_RWSTDDEBUG -D_RWSTD_SHARED_LIB -I$(TOPDIR)/include -I$(BUILDDIR)/include -x cxx -nocxxstd -std strict_ansi_errors -g -w1 -msg_disable 450 -ptr repository.ti $(TOPDIR)/src/locale_core.cpp
cxx: Info: $(TOPDIR)/src/locale_core.cpp, line 110:
statement is unreachable
RW::_rw_chararray pathname;
----------------------------^
...
cxx -c -D_RWSTDDEBUG -D_RWSTD_SHARED_LIB -I$(TOPDIR)/include -I$(BUILDDIR)/include -x cxx -nocxxstd -std strict_ansi_errors -g -w1 -msg_disable 450 -ptr repository.ti $(TOPDIR)/src/num_get.cpp
cxx: Warning: $(TOPDIR)/src/num_get.cpp, line 761:
underflow occurs in evaluating this expression
__rw_validate (ld, LDbl (_RWSTD_LDBL_MIN),
-----------------------------------------^
cxx -c -D_RWSTDDEBUG -D_RWSTD_SHARED_LIB -I$(TOPDIR)/include -I$(BUILDDIR)/include -x cxx -nocxxstd -std strict_ansi_errors -g -w1 -msg_disable 450 -ptr repository.ti $(TOPDIR)/src/num_put.cpp
cxx: Warning: $(TOPDIR)/include/limits, line 439:
underflow occurs in evaluating this expression
_RWSTD_STATIC_FUN (long double, (min), _RWSTD_LDBL_MIN)
----^