[jira] Created: (STDCXX-832) [HP aCC 6.16] warning #4232 in : conversion from "wchar_t *" to a more strictly aligned type

[Martin Sebor (JIRA)]

[HP aCC 6.16] warning #4232 in <string>: conversion from "wchar_t *" to a more 
strictly aligned type
----------------------------------------------------------------------------------------------------

                 Key: STDCXX-832
                 URL: https://issues.apache.org/jira/browse/STDCXX-832
             Project: C++ Standard Library
          Issue Type: Bug
          Components: 21. Strings
    Affects Versions: 4.2.0
         Environment: aCC: HP C/aC++ B3910B A.06.16 [Nov 26 2007]
            Reporter: Martin Sebor
            Assignee: Martin Sebor
            Priority: Minor
             Fix For: 4.2.1


Nightly builds with HP aCC 6.16 produce many warnings like the following:
{noformat}
aCC -c    -mt -I$(TOPDIR)/include -I$(BUILDDIR)/include  -AA  +O2  +DD64 +w \
    +W392,655,684,818,819,849 \
    +W2193,2236,2261,2340,2401,2487 \
    +W4227,4229,4231,4235,4237,4249 \
    +W4255,4272,4284,4285,4286,4296,4297 +W3348    \
    $(TOPDIR)/src/ti_wnum_put.cpp
"$(TOPDIR)/include/string", line 842: warning #4232-D: conversion from "wchar_t 
*" to a more strictly aligned type "__rw::__string_ref<wchar_t, 
std::char_traits<wchar_t>, std::allocator<wchar_t>> *" may cause misaligned 
access
          return _RWSTD_REINTERPRET_CAST (_C_string_ref_type*, _C_data) - 1; 
                 ^
          detected during:
            instantiation of "__rw::__string_ref<_Traits::char_type, _Traits, 
_Allocator> *std::basic_string<_CharT, _Traits, _Allocator>::_C_pref() const 
[with _CharT=wchar_t, _Traits=std::char_traits<wchar_t>, 
_Allocator=std::allocator<wchar_t>]" at line 899
            instantiation of "void std::basic_string<_CharT, _Traits, 
_Allocator>::_C_unlink(_Allocator::pointer) [with _CharT=wchar_t, 
_Traits=std::char_traits<wchar_t>, _Allocator=std::allocator<wchar_t>]" at line 
198
            instantiation of "std::basic_string<_CharT, _Traits, 
_Allocator>::~basic_string() [with _CharT=wchar_t, 
_Traits=std::char_traits<wchar_t>, _Allocator=std::allocator<wchar_t>]" at line 
99 of "$(TOPDIR)/include/loc/_num_put.cc"
            instantiation of "_OutputIter std::num_put<_CharT, 
_OutputIter>::_C_put(_OutputIter, std::ios_base &, _CharT, int, const void *) 
const [with _CharT=wchar_t, _OutputIter=std::ostreambuf_iterator<wchar_t, 
std::char_traits<wchar_t>>]" at line 183 of "$(TOPDIR)/include/loc/_num_put.h"
{noformat}

Here's the count from a recent build:

{noformat}
$ gunzip -c hpux-11.31-ia64-acc-6.16-12S-645002-log.gz | grep 
"include/string\", .*: warning #4232" | wc -l
87
{noformat}

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