[PATCH] sso-string@gnu-versioned-namespace [PR83077]
François Dumont
frs.dumont@gmail.com
Sun Aug 13 19:51:06 GMT 2023
Here is another version with enhanced sizeof/alignof static_assert in
string-inst.cc for the std::__cow_string definition from <stdexcept>.
The assertions in cow-stdexcept.cc are now checking the definition which
is in the same file.
On 13/08/2023 15:27, François Dumont wrote:
>
> Here is the fixed patch tested in all 3 modes:
>
> - _GLIBCXX_USE_DUAL_ABI
>
> - !_GLIBCXX_USE_DUAL_ABI && !_GLIBCXX_USE_CXX11_ABI
>
> - !_GLIBCXX_USE_DUAL_ABI && _GLIBCXX_USE_CXX11_ABI
>
> I don't know what you have in mind for the change below but I wanted
> to let you know that I tried to put COW std::basic_string into a
> nested __cow namespace when _GLIBCXX_USE_CXX11_ABI. But it had more
> impact on string-inst.cc so I preferred the macro substitution approach.
>
> There are some test failing when !_GLIBCXX_USE_CXX11_ABI that are
> unrelated with my changes. I'll propose fixes in coming days.
>
> libstdc++: [_GLIBCXX_INLINE_VERSION] Use cxx11 abi [PR83077]
>
> Use cxx11 abi when activating versioned namespace mode. To do support
> a new configuration mode where !_GLIBCXX_USE_DUAL_ABI and
> _GLIBCXX_USE_CXX11_ABI.
>
> The main change is that std::__cow_string is now defined whenever
> _GLIBCXX_USE_DUAL_ABI
> or _GLIBCXX_USE_CXX11_ABI is true. Implementation is using
> available std::string in
> case of dual abi and a subset of it when it's not.
>
> On the other side std::__sso_string is defined only when
> _GLIBCXX_USE_DUAL_ABI is true
> and _GLIBCXX_USE_CXX11_ABI is false. Meaning that
> std::__sso_string is a typedef for the
> cow std::string implementation when dual abi is disabled and cow
> string is being used.
>
> libstdcxx-v3/ChangeLog:
>
> PR libstdc++/83077
> * acinclude.m4 [GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI]:
> Default to "new" libstdcxx abi.
> * config/locale/dragonfly/monetary_members.cc
> [!_GLIBCXX_USE_DUAL_ABI]: Define money_base
> members.
> * config/locale/generic/monetary_members.cc
> [!_GLIBCXX_USE_DUAL_ABI]: Likewise.
> * config/locale/gnu/monetary_members.cc
> [!_GLIBCXX_USE_DUAL_ABI]: Likewise.
> * config/locale/gnu/numeric_members.cc
> [!_GLIBCXX_USE_DUAL_ABI](__narrow_multibyte_chars): Define.
> * configure: Regenerate.
> * include/bits/c++config
> [_GLIBCXX_INLINE_VERSION](_GLIBCXX_NAMESPACE_CXX11,
> _GLIBCXX_BEGIN_NAMESPACE_CXX11):
> Define empty.
> [_GLIBCXX_INLINE_VERSION](_GLIBCXX_END_NAMESPACE_CXX11,
> _GLIBCXX_DEFAULT_ABI_TAG):
> Likewise.
> * include/bits/cow_string.h [!_GLIBCXX_USE_CXX11_ABI]:
> Define a light version of COW
> basic_string as __std_cow_string for use in stdexcept.
> * include/std/stdexcept [_GLIBCXX_USE_CXX11_ABI]: Define
> __cow_string.
> (__cow_string(const char*)): New.
> (__cow_string::c_str()): New.
> * python/libstdcxx/v6/printers.py
> (StdStringPrinter::__init__): Set self.new_string to True
> when std::__8::basic_string type is found.
> * src/Makefile.am
> [ENABLE_SYMVERS_GNU_NAMESPACE](ldbl_alt128_compat_sources): Define empty.
> * src/Makefile.in: Regenerate.
> * src/c++11/Makefile.am (cxx11_abi_sources): Rename into...
> (dual_abi_sources): ...this. Also move cow-local_init.cc,
> cxx11-hash_tr1.cc,
> cxx11-ios_failure.cc entries to...
> (sources): ...this.
> (extra_string_inst_sources): Move cow-fstream-inst.cc,
> cow-sstream-inst.cc, cow-string-inst.cc,
> cow-string-io-inst.cc, cow-wtring-inst.cc,
> cow-wstring-io-inst.cc, cxx11-locale-inst.cc,
> cxx11-wlocale-inst.cc entries to...
> (inst_sources): ...this.
> * src/c++11/Makefile.in: Regenerate.
> * src/c++11/cow-fstream-inst.cc [_GLIBCXX_USE_CXX11_ABI]:
> Skip definitions.
> * src/c++11/cow-locale_init.cc [_GLIBCXX_USE_CXX11_ABI]:
> Skip definitions.
> * src/c++11/cow-sstream-inst.cc [_GLIBCXX_USE_CXX11_ABI]:
> Skip definitions.
> * src/c++11/cow-stdexcept.cc [_GLIBCXX_USE_CXX11_ABI]:
> Include <bits/cow_string.h>.
> [_GLIBCXX_USE_DUAL_ABI ||
> _GLIBCXX_USE_CXX11_ABI](__cow_string): Redefine before
> including <stdexcept>. Define
> _GLIBCXX_DEFINE_STDEXCEPT_INSTANTIATIONS so that
> __cow_string definition in <stdexcept> is skipped.
> [_GLIBCXX_USE_CXX11_ABI]: Skip Transaction Memory TS
> definitions.
> Move static_assert to check std::_cow_string abi layout to...
> * src/c++11/string-inst.cc: ...here.
> (_GLIBCXX_DEFINING_CXX11_ABI_INSTANTIATIONS): Define
> following _GLIBCXX_USE_CXX11_ABI
> value.
> [_GLIBCXX_USE_CXX11_ABI &&
> !_GLIBCXX_DEFINING_CXX11_ABI_INSTANTIATIONS]:
> Define _GLIBCXX_DEFINING_COW_STRING_INSTANTIATIONS.
> Include <bits/cow_string.h>.
> Define basic_string as __std_cow_string for the current
> translation unit.
> * src/c++11/cow-string-inst.cc [_GLIBCXX_USE_CXX11_ABI]:
> Skip definitions.
> * src/c++11/cow-string-io-inst.cc
> [_GLIBCXX_USE_CXX11_ABI]: Skip definitions.
> * src/c++11/cow-wstring-inst.cc [_GLIBCXX_USE_CXX11_ABI]:
> Skip definitions.
> * src/c++11/cow-wstring-io-inst.cc
> [_GLIBCXX_USE_CXX11_ABI]: Skip definitions.
> * src/c++11/cxx11-hash_tr1.cc [!_GLIBCXX_USE_CXX11_ABI]:
> Skip definitions.
> * src/c++11/cxx11-ios_failure.cc
> [!_GLIBCXX_USE_CXX11_ABI]: Skip definitions.
> [!_GLIBCXX_USE_DUAL_ABI] (__ios_failure): Remove.
> * src/c++11/cxx11-locale-inst.cc: Cleanup, just include
> locale-inst.cc.
> * src/c++11/cxx11-stdexcept.cc [!_GLIBCXX_USE_CXX11_ABI]:
> Skip definitions.
> * src/c++11/cxx11-wlocale-inst.cc
> [!_GLIBCXX_USE_CXX11_ABI]: Skip definitions.
> * src/c++11/locale-inst-numeric.h
> [!_GLIBCXX_USE_DUAL_ABI](std::use_facet<num_get<>>,
> std::use_facet<num_put<>>): Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](std::has_facet<num_get<>>,
> std::has_facet<num_put<>>): Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](std::num_get<C,
> istreambuf_iterator<C>>): Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](std::num_put<C,
> ostreambuf_iterator<C>>): Instantiate.
> * src/c++11/locale-inst.cc [!_GLIBCXX_USE_DUAL_ABI]: Build
> only when configured
> _GLIBCXX_USE_CXX11_ABI is equal to currently built abi.
> [!_GLIBCXX_USE_DUAL_ABI](__moneypunct_cache<C, false>):
> Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](__moneypunct_cache<C, true>):
> Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](__numpunct_cache<C>): Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](__timepunct<C>): Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](__timepunct_cache<C>): Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](time_put<C,
> ostreambuf_iterator<C>>): Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](time_put_byname<C,
> ostreambuf_iterator<C>>): Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](__ctype_abstract_base<C>): Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](ctype_byname<C>): Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](__codecvt_abstract_base<C, char, mbstate_t>):
> Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](codecvt_byname<C, char,
> mbstate_t>): Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](use_facet<ctype<C>>(const locale&)): Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](use_facet<codecvt<C, char,
> mbstate_t>>(const locale&)): Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](use_facet<__timepunct<C>>(const locale&)):
> Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](use_facet<time_put<C>>(const locale&)):
> Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](has_facet<ctype<C>>(const locale&)): Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](has_facet<codecvt<C, char,
> mbstate_t>>(const locale&)): Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](has_facet<__timepunct<C>>(const locale&)):
> Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](has_facet<time_put<C>>(const locale&)):
> Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](__add_grouping<C>): Define.
> [!_GLIBCXX_USE_DUAL_ABI](__pad<C, char_traits<C>>):
> Instantiate.
> [!_GLIBCXX_USE_DUAL_ABI](__int_to_char(C*, unsigned long,
> const C*,
> ios_base::fmtflags, bool)): Define.
> [!_GLIBCXX_USE_DUAL_ABI](__int_to_char(C*, unsigned long
> long, const C*,
> ios_base::fmtflags, bool)): Define.
> * src/c++11/wlocale-inst.cc [!_GLIBCXX_USE_CXX11_ABI]:
> Skip definitions.
> * src/c++98/Makefile.am (cxx11_abi_sources): Remove,
> unique cow-istream-string.cc entry
> move to...
> (inst_sources): ...this.
> * src/c++98/Makefile.in: Regenerate.
> * src/c++98/cow-istream-string.cc: Include <bits/c++config.h>.
> [_GLIBCXX_USE_CXX11_ABI]: Skip definitions.
> * src/c++98/hash_tr1.cc [_GLIBCXX_USE_CXX11_ABI]: Skip
> definitions.
> * src/c++98/ios_failure.cc
> [_GLIBCXX_USE_CXX11_ABI][_GLIBCXX_USE_DUAL_ABI]: Skip definitions.
> * src/c++98/istream-string.cc [!_GLIBCXX_USE_DUAL_ABI]:
> Build only when configured
> _GLIBCXX_USE_CXX11_ABI is equal to currently built abi.
> * src/c++98/locale_facets.cc
> [_GLIBCXX_USE_CXX11_ABI](__verify_grouping): Remove.
> * src/c++98/stdexcept.cc
> [_GLIBCXX_USE_CXX11_ABI](logic_error(const string&): Remove.
> [_GLIBCXX_USE_CXX11_ABI](domain_error(const string&): Remove.
> [_GLIBCXX_USE_CXX11_ABI](invalid_argument(const string&):
> Remove.
> [_GLIBCXX_USE_CXX11_ABI](length_error(const string&): Remove.
> [_GLIBCXX_USE_CXX11_ABI](out_of_range(const string&): Remove.
> [_GLIBCXX_USE_CXX11_ABI](runtime_error(const string&): Remove.
> [_GLIBCXX_USE_CXX11_ABI](range_error(const string&): Remove.
> [_GLIBCXX_USE_CXX11_ABI](overflow_error(const string&):
> Remove.
> [_GLIBCXX_USE_CXX11_ABI](underflow_error(const string&):
> Remove.
>
> Ok to commit ?
>
> François
>
> On 11/08/2023 09:51, Jonathan Wakely wrote:
>>
>>
>> On Fri, 11 Aug 2023, 06:44 François Dumont via Libstdc++,
>> <libstdc++@gcc.gnu.org <mailto:libstdc%2B%2B@gcc.gnu.org>> wrote:
>>
>> I hadn't tested the most basic default configuration and it is
>> failing,
>>
>>
>> I did wonder about that when you said which configurations you had
>> tested :)
>>
>>
>>
>>
>> I need some more time yet.
>>
>>
>> OK, no problem.
>>
>> I actually have an idea for replacing the __cow_string hack with
>> something better, which I will try to work on next week. That might
>> make things simpler for you, as you won't need the __std_cow_string
>> macro.
>>
>>
>>
>>
>>
>> François
>>
>>
>> On 10/08/2023 07:13, François Dumont wrote:
>> > Hi
>> >
>> > I've eventually completed this work.
>> >
>> > This evolution will allow to build libstdc++ without dual abi and
>> > using cxx11 abi. For the moment such a config is only accessible
>> > through the --enable-symvers=gnu-versioned-namespace configuration.
>> >
>> > libstdc++: [_GLIBCXX_INLINE_VERSION] Use cxx11 abi [PR83077]
>> >
>> > Use cxx11 abi when activating versioned namespace mode.
>> >
>> > libstdcxx-v3/ChangeLog:
>> >
>> > PR libstdc++/83077
>> > * acinclude.m4 [GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI]:
>> > Default to "new" libstdcxx abi.
>> > * config/locale/dragonfly/monetary_members.cc
>> > [!_GLIBCXX_USE_DUAL_ABI]: Define money_base
>> > members.
>> > * config/locale/generic/monetary_members.cc
>> > [!_GLIBCXX_USE_DUAL_ABI]: Likewise.
>> > * config/locale/gnu/monetary_members.cc
>> > [!_GLIBCXX_USE_DUAL_ABI]: Likewise.
>> > * config/locale/gnu/numeric_members.cc
>> > [!_GLIBCXX_USE_DUAL_ABI](__narrow_multibyte_chars): Define.
>> > * configure: Regenerate.
>> > * include/bits/c++config
>> > [_GLIBCXX_INLINE_VERSION](_GLIBCXX_NAMESPACE_CXX11,
>> > _GLIBCXX_BEGIN_NAMESPACE_CXX11):
>> > Define empty.
>> > [_GLIBCXX_INLINE_VERSION](_GLIBCXX_END_NAMESPACE_CXX11,
>> > _GLIBCXX_DEFAULT_ABI_TAG):
>> > Likewise.
>> > * include/bits/cow_string.h [!_GLIBCXX_USE_CXX11_ABI]:
>> > Define a light version of COW
>> > basic_string as __std_cow_string for use in stdexcept.
>> > * include/std/stdexcept [_GLIBCXX_USE_CXX11_ABI]:
>> Define
>> > __cow_string.
>> > (__cow_string(const char*)): New.
>> > (__cow_string::c_str()): New.
>> > * python/libstdcxx/v6/printers.py
>> > (StdStringPrinter::__init__): Set self.new_string to True
>> > when std::__8::basic_string type is found.
>> > * src/Makefile.am
>> > [ENABLE_SYMVERS_GNU_NAMESPACE](ldbl_alt128_compat_sources):
>> Define empty.
>> > * src/Makefile.in: Regenerate.
>> > * src/c++11/Makefile.am (cxx11_abi_sources): Rename
>> into...
>> > (dual_abi_sources): ...this. Also move
>> cow-local_init.cc,
>> > cxx11-hash_tr1.cc,
>> > cxx11-ios_failure.cc entries to...
>> > (sources): ...this.
>> > (extra_string_inst_sources): Move cow-fstream-inst.cc,
>> > cow-sstream-inst.cc, cow-string-inst.cc,
>> > cow-string-io-inst.cc, cow-wtring-inst.cc,
>> > cow-wstring-io-inst.cc, cxx11-locale-inst.cc,
>> > cxx11-wlocale-inst.cc entries to...
>> > (inst_sources): ...this.
>> > * src/c++11/Makefile.in: Regenerate.
>> > * src/c++11/cow-fstream-inst.cc
>> [_GLIBCXX_USE_CXX11_ABI]:
>> > Skip definitions.
>> > * src/c++11/cow-locale_init.cc
>> [_GLIBCXX_USE_CXX11_ABI]:
>> > Skip definitions.
>> > * src/c++11/cow-sstream-inst.cc
>> [_GLIBCXX_USE_CXX11_ABI]:
>> > Skip definitions.
>> > * src/c++11/cow-stdexcept.cc [_GLIBCXX_USE_CXX11_ABI]:
>> > Include <bits/cow_string.h>.
>> > [_GLIBCXX_USE_DUAL_ABI ||
>> > _GLIBCXX_USE_CXX11_ABI](__cow_string): Redefine before including
>> > <stdexcept>. Define
>> > _GLIBCXX_DEFINE_STDEXCEPT_INSTANTIATIONS so that __cow_string
>> definition
>> > in <stdexcept> is skipped.
>> > [_GLIBCXX_USE_CXX11_ABI]: Skip Transaction Memory TS
>> > definitions.
>> > * src/c++11/cow-string-inst.cc
>> [_GLIBCXX_USE_CXX11_ABI]:
>> > Skip definitions.
>> > * src/c++11/cow-string-io-inst.cc
>> > [_GLIBCXX_USE_CXX11_ABI]: Skip definitions.
>> > * src/c++11/cow-wstring-inst.cc
>> [_GLIBCXX_USE_CXX11_ABI]:
>> > Skip definitions.
>> > * src/c++11/cow-wstring-io-inst.cc
>> > [_GLIBCXX_USE_CXX11_ABI]: Skip definitions.
>> > * src/c++11/cxx11-hash_tr1.cc
>> [!_GLIBCXX_USE_CXX11_ABI]:
>> > Skip definitions.
>> > * src/c++11/cxx11-ios_failure.cc
>> > [!_GLIBCXX_USE_CXX11_ABI]: Skip definitions.
>> > [!_GLIBCXX_USE_DUAL_ABI] (__ios_failure): Remove.
>> > * src/c++11/cxx11-locale-inst.cc: Cleanup, just
>> include
>> > locale-inst.cc.
>> > * src/c++11/cxx11-stdexcept.cc
>> [!_GLIBCXX_USE_CXX11_ABI]:
>> > Skip definitions.
>> > * src/c++11/cxx11-wlocale-inst.cc
>> > [!_GLIBCXX_USE_CXX11_ABI]: Skip definitions.
>> > * src/c++11/locale-inst-numeric.h
>> > [!_GLIBCXX_USE_DUAL_ABI](std::use_facet<num_get<>>,
>> > std::use_facet<num_put<>>): Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](std::has_facet<num_get<>>,
>> > std::has_facet<num_put<>>): Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](std::num_get<C,
>> > istreambuf_iterator<C>>): Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](std::num_put<C,
>> > ostreambuf_iterator<C>>): Instantiate.
>> > * src/c++11/locale-inst.cc
>> [!_GLIBCXX_USE_DUAL_ABI]: Build
>> > only when configured
>> > _GLIBCXX_USE_CXX11_ABI is equal to currently built abi.
>> > [!_GLIBCXX_USE_DUAL_ABI](__moneypunct_cache<C, false>):
>> > Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](__moneypunct_cache<C, true>):
>> > Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](__numpunct_cache<C>): Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](__timepunct<C>): Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](__timepunct_cache<C>): Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](time_put<C,
>> > ostreambuf_iterator<C>>): Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](time_put_byname<C,
>> > ostreambuf_iterator<C>>): Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](__ctype_abstract_base<C>): Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](ctype_byname<C>): Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](__codecvt_abstract_base<C, char,
>> > mbstate_t>): Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](codecvt_byname<C, char,
>> > mbstate_t>): Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](codecvt_byname<C, char,
>> > mbstate_t>): Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](use_facet<ctype<C>>(const locale&)):
>> > Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](use_facet<codecvt<C, char,
>> > mbstate_t>>(const locale&)): Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](use_facet<__timepunct<C>>(const
>> locale&)):
>> > Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](use_facet<time_put<C>>(const locale&)):
>> > Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](has_facet<ctype<C>>(const locale&)):
>> > Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](has_facet<codecvt<C, char,
>> > mbstate_t>>(const locale&)): Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](has_facet<__timepunct<C>>(const
>> locale&)):
>> > Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](has_facet<time_put<C>>(const locale&)):
>> > Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](__add_grouping<C>): Define.
>> > [!_GLIBCXX_USE_DUAL_ABI](__pad<C, char_traits<C>>):
>> > Instantiate.
>> > [!_GLIBCXX_USE_DUAL_ABI](__int_to_char(C*, unsigned long,
>> > const C*,
>> > ios_base::fmtflags, bool)): Define.
>> > [!_GLIBCXX_USE_DUAL_ABI](__int_to_char(C*, unsigned long
>> > long, const C*,
>> > ios_base::fmtflags, bool)): Define.
>> > * src/c++11/string-inst.cc
>> > (_GLIBCXX_DEFINING_CXX11_ABI_INSTANTIATIONS): Define following
>> > _GLIBCXX_USE_CXX11_ABI value.
>> > [_GLIBCXX_USE_CXX11_ABI &&
>> > !_GLIBCXX_DEFINING_CXX11_ABI_INSTANTIATIONS]:
>> > Define _GLIBCXX_DEFINING_COW_STRING_INSTANTIATIONS.
>> > Include <bits/cow_string.h>.
>> > Define basic_string as __std_cow_string for the
>> current
>> > translation unit.
>> > * src/c++11/wlocale-inst.cc [!_GLIBCXX_USE_CXX11_ABI]:
>> > Skip definitions.
>> > * src/c++98/Makefile.am (cxx11_abi_sources): Remove,
>> > unique cow-istream-string.cc entry
>> > move to...
>> > (inst_sources): ...this.
>> > * src/c++98/Makefile.in: Regenerate.
>> > * src/c++98/cow-istream-string.cc: Include
>> > <bits/c++config.h>.
>> > [_GLIBCXX_USE_CXX11_ABI]: Skip definitions.
>> > * src/c++98/hash_tr1.cc [_GLIBCXX_USE_CXX11_ABI]: Skip
>> > definitions.
>> > * src/c++98/ios_failure.cc
>> > [_GLIBCXX_USE_CXX11_ABI][_GLIBCXX_USE_DUAL_ABI]: Skip definitions.
>> > * src/c++98/istream-string.cc
>> [!_GLIBCXX_USE_DUAL_ABI]:
>> > Build only when configured
>> > _GLIBCXX_USE_CXX11_ABI is equal to currently built abi.
>> > * src/c++98/locale_facets.cc
>> > [_GLIBCXX_USE_CXX11_ABI](__verify_grouping): Remove.
>> > * src/c++98/stdexcept.cc
>> > [_GLIBCXX_USE_CXX11_ABI](logic_error(const string&): Remove.
>> > [_GLIBCXX_USE_CXX11_ABI](domain_error(const string&): Remove.
>> > [_GLIBCXX_USE_CXX11_ABI](invalid_argument(const string&):
>> > Remove.
>> > [_GLIBCXX_USE_CXX11_ABI](length_error(const string&): Remove.
>> > [_GLIBCXX_USE_CXX11_ABI](out_of_range(const string&): Remove.
>> > [_GLIBCXX_USE_CXX11_ABI](runtime_error(const string&):
>> > Remove.
>> > [_GLIBCXX_USE_CXX11_ABI](range_error(const string&): Remove.
>> > [_GLIBCXX_USE_CXX11_ABI](overflow_error(const string&):
>> > Remove.
>> > [_GLIBCXX_USE_CXX11_ABI](underflow_error(const string&):
>> > Remove.
>> >
>> > Tested under linux x86_64 with following configs:
>> >
>> > --enable-symvers=gnu-versioned-namespace
>> >
>> > --disable-libstdcxx-dual-abi
>> >
>> > Ok to commit ?
>> >
>> > François
>> >
>> >
>>
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