[PATCH] sso-string@gnu-versioned-namespace [PR83077]
François Dumont
frs.dumont@gmail.com
Sun Aug 13 13:27:24 GMT 2023
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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