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re PR libstdc++/64276 (would be better to use __cpp_exceptions rather than __EXCEPTIONS to determine whether exceptions are available) 

PR libstdc++/64276
	* doc/doxygen/user.cfg.in: Define __cpp_exceptions and __cpp_rtti.
	* doc/html/manual/using_exceptions.html: Regenerate.
	* doc/xml/manual/using_exceptions.xml: Use SD-6 feature-testing
	macros, __cpp_exceptions and __cpp_rtti, instead of __EXCEPTIONS and
	__GXX_RTTI.
	* include/bits/c++config: Likewise.
	* include/bits/locale_classes.tcc: Likewise.
	* include/bits/shared_ptr.h: Likewise.
	* include/bits/shared_ptr_base.h: Likewise.
	* include/debug/formatter.h: Likewise.
	* include/experimental/any: Likewise.
	* include/ext/rope: Likewise.
	* include/ext/ropeimpl.h: Likewise.
	* include/std/functional: Likewise.
	* include/tr1/functional: Likewise.
	* include/tr1/shared_ptr.h: Likewise.
	* libsupc++/eh_call.cc: Likewise.
	* libsupc++/eh_personality.cc: Likewise.
	* libsupc++/exception_defines.h: Likewise.
	* libsupc++/exception_ptr.h: Likewise.
	* libsupc++/guard.cc: Likewise.
	* libsupc++/pbase_type_info.cc: Likewise.
	* libsupc++/pointer_type_info.cc: Likewise.
	* libsupc++/vterminate.cc: Likewise.
	* src/c++11/thread.cc: Likewise.

From-SVN: r218679
This commit is contained in:
Jonathan Wakely 2014-12-12 15:58:49 +00:00 committed by Jonathan Wakely
parent 4db4954fc5
commit 0f3d27f01a
24 changed files with 84 additions and 57 deletions
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27
libstdc++-v3/ChangeLog
View File

@ -5,6 +5,33 @@
disabled.
* testsuite/18_support/exception_ptr/64241.cc: New.
PR libstdc++/64276
* doc/doxygen/user.cfg.in: Define __cpp_exceptions and __cpp_rtti.
* doc/html/manual/using_exceptions.html: Regenerate.
* doc/xml/manual/using_exceptions.xml: Use SD-6 feature-testing
macros, __cpp_exceptions and __cpp_rtti, instead of __EXCEPTIONS and
__GXX_RTTI.
* include/bits/c++config: Likewise.
* include/bits/locale_classes.tcc: Likewise.
* include/bits/shared_ptr.h: Likewise.
* include/bits/shared_ptr_base.h: Likewise.
* include/debug/formatter.h: Likewise.
* include/experimental/any: Likewise.
* include/ext/rope: Likewise.
* include/ext/ropeimpl.h: Likewise.
* include/std/functional: Likewise.
* include/tr1/functional: Likewise.
* include/tr1/shared_ptr.h: Likewise.
* libsupc++/eh_call.cc: Likewise.
* libsupc++/eh_personality.cc: Likewise.
* libsupc++/exception_defines.h: Likewise.
* libsupc++/exception_ptr.h: Likewise.
* libsupc++/guard.cc: Likewise.
* libsupc++/pbase_type_info.cc: Likewise.
* libsupc++/pointer_type_info.cc: Likewise.
* libsupc++/vterminate.cc: Likewise.
* src/c++11/thread.cc: Likewise.
2014-12-12 Jonathan Wakely <jwakely@redhat.com>
* include/bits/stl_iterator.h (make_reverse_iterator): LWG DR 2285.

4
libstdc++-v3/doc/doxygen/user.cfg.in
View File

@ -2142,8 +2142,8 @@ PREDEFINED = __cplusplus=201103L \
_GLIBCXX_USE_C99_STDINT_TR1 \
_GLIBCXX_USE_SCHED_YIELD \
_GLIBCXX_USE_NANOSLEEP \
__EXCEPTIONS \
__GXX_RTTI \
__cpp_exceptions \
__cpp_rtti \
ATOMIC_INT_LOCK_FREE \
PB_DS_DATA_TRUE_INDICATOR \
PB_DS_STATIC_ASSERT=// \

6
libstdc++-v3/doc/html/manual/using_exceptions.html
View File

@ -151,7 +151,7 @@ exception neutrality and exception safety.
and <code class="literal">__throw_exception_again</code>. They are defined
as follows.
</p><pre class="programlisting">
#ifdef __EXCEPTIONS
#if __cpp_exceptions
# define __try try
# define __catch(X) catch(X)
# define __throw_exception_again throw
@ -165,7 +165,7 @@ exception neutrality and exception safety.
class <code class="classname">exception</code>, there exists a corresponding
function with C language linkage. An example:
</p><pre class="programlisting">
#ifdef __EXCEPTIONS
#if __cpp_exceptions
void __throw_bad_exception(void)
{ throw bad_exception(); }
#else
@ -310,4 +310,4 @@ is called.
<a class="link" href="http://gcc.gnu.org/PR25191" target="_top">
GCC Bug 25191: exception_defines.h #defines try/catch
</a>
</em>. </span></p></div></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="using_concurrency.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="using.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="debug.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Concurrency </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> Debugging Support</td></tr></table></div></body></html>
</em>. </span></p></div></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="using_concurrency.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="using.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="debug.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Concurrency </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> Debugging Support</td></tr></table></div></body></html>

4
libstdc++-v3/doc/xml/manual/using_exceptions.xml
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@ -251,7 +251,7 @@ exception neutrality and exception safety.
</para>
<programlisting>
#ifdef __EXCEPTIONS
#if __cpp_exceptions
# define __try try
# define __catch(X) catch(X)
# define __throw_exception_again throw
@ -269,7 +269,7 @@ exception neutrality and exception safety.
</para>
<programlisting>
#ifdef __EXCEPTIONS
#if __cpp_exceptions
void __throw_bad_exception(void)
{ throw bad_exception(); }
#else

2
libstdc++-v3/include/bits/c++config
View File

@ -121,7 +121,7 @@
#endif
#ifndef _GLIBCXX_THROW_OR_ABORT
# if __EXCEPTIONS
# if __cpp_exceptions
# define _GLIBCXX_THROW_OR_ABORT(_EXC) (throw (_EXC))
# else
# define _GLIBCXX_THROW_OR_ABORT(_EXC) (__builtin_abort())

4
libstdc++-v3/include/bits/locale_classes.tcc
View File

@ -106,7 +106,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
const size_t __i = _Facet::id._M_id();
const locale::facet** __facets = __loc._M_impl->_M_facets;
return (__i < __loc._M_impl->_M_facets_size
#ifdef __GXX_RTTI
#if __cpp_rtti
&& dynamic_cast<const _Facet*>(__facets[__i]));
#else
&& static_cast<const _Facet*>(__facets[__i]));
@ -135,7 +135,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
const locale::facet** __facets = __loc._M_impl->_M_facets;
if (__i >= __loc._M_impl->_M_facets_size || !__facets[__i])
__throw_bad_cast();
#ifdef __GXX_RTTI
#if __cpp_rtti
return dynamic_cast<const _Facet&>(*__facets[__i]);
#else
return static_cast<const _Facet&>(*__facets[__i]);

2
libstdc++-v3/include/bits/shared_ptr.h
View File

@ -75,7 +75,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
inline _Del*
get_deleter(const __shared_ptr<_Tp, _Lp>& __p) noexcept
{
#ifdef __GXX_RTTI
#if __cpp_rtti
return static_cast<_Del*>(__p._M_get_deleter(typeid(_Del)));
#else
return 0;

6
libstdc++-v3/include/bits/shared_ptr_base.h
View File

@ -476,7 +476,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
virtual void*
_M_get_deleter(const std::type_info& __ti) noexcept
{
#ifdef __GXX_RTTI
#if __cpp_rtti
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 2400. shared_ptr's get_deleter() should use addressof()
return __ti == typeid(_Deleter)
@ -544,7 +544,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
virtual void*
_M_get_deleter(const std::type_info& __ti) noexcept
{
#ifdef __GXX_RTTI
#if __cpp_rtti
if (__ti == typeid(_Sp_make_shared_tag))
return const_cast<typename remove_cv<_Tp>::type*>(_M_ptr());
#endif
@ -1087,7 +1087,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
owner_before(__weak_ptr<_Tp1, _Lp> const& __rhs) const
{ return _M_refcount._M_less(__rhs._M_refcount); }
#ifdef __GXX_RTTI
#if __cpp_rtti
protected:
// This constructor is non-standard, it is used by allocate_shared.
template<typename _Alloc, typename... _Args>

18
libstdc++-v3/include/debug/formatter.h
View File

@ -218,7 +218,7 @@ namespace __gnu_debug
{
_M_variant._M_iterator._M_name = __name;
_M_variant._M_iterator._M_address = &__it;
#ifdef __GXX_RTTI
#if __cpp_rtti
_M_variant._M_iterator._M_type = &typeid(__it);
#else
_M_variant._M_iterator._M_type = 0;
@ -228,7 +228,7 @@ namespace __gnu_debug
typename _Sequence::iterator>::
__value ? __mutable_iterator : __const_iterator;
_M_variant._M_iterator._M_sequence = __it._M_get_sequence();
#ifdef __GXX_RTTI
#if __cpp_rtti
_M_variant._M_iterator._M_seq_type = &typeid(_Sequence);
#else
_M_variant._M_iterator._M_seq_type = 0;
@ -256,7 +256,7 @@ namespace __gnu_debug
{
_M_variant._M_iterator._M_name = __name;
_M_variant._M_iterator._M_address = &__it;
#ifdef __GXX_RTTI
#if __cpp_rtti
_M_variant._M_iterator._M_type = &typeid(__it);
#else
_M_variant._M_iterator._M_type = 0;
@ -266,7 +266,7 @@ namespace __gnu_debug
typename _Sequence::local_iterator>::
__value ? __mutable_iterator : __const_iterator;
_M_variant._M_iterator._M_sequence = __it._M_get_sequence();
#ifdef __GXX_RTTI
#if __cpp_rtti
_M_variant._M_iterator._M_seq_type = &typeid(_Sequence);
#else
_M_variant._M_iterator._M_seq_type = 0;
@ -291,7 +291,7 @@ namespace __gnu_debug
{
_M_variant._M_iterator._M_name = __name;
_M_variant._M_iterator._M_address = &__it;
#ifdef __GXX_RTTI
#if __cpp_rtti
_M_variant._M_iterator._M_type = &typeid(__it);
#else
_M_variant._M_iterator._M_type = 0;
@ -308,7 +308,7 @@ namespace __gnu_debug
{
_M_variant._M_iterator._M_name = __name;
_M_variant._M_iterator._M_address = &__it;
#ifdef __GXX_RTTI
#if __cpp_rtti
_M_variant._M_iterator._M_type = &typeid(__it);
#else
_M_variant._M_iterator._M_type = 0;
@ -325,7 +325,7 @@ namespace __gnu_debug
{
_M_variant._M_iterator._M_name = __name;
_M_variant._M_iterator._M_address = &__it;
#ifdef __GXX_RTTI
#if __cpp_rtti
_M_variant._M_iterator._M_type = &typeid(__it);
#else
_M_variant._M_iterator._M_type = 0;
@ -345,7 +345,7 @@ namespace __gnu_debug
_M_variant._M_sequence._M_name = __name;
_M_variant._M_sequence._M_address =
static_cast<const _Sequence*>(&__seq);
#ifdef __GXX_RTTI
#if __cpp_rtti
_M_variant._M_sequence._M_type = &typeid(_Sequence);
#else
_M_variant._M_sequence._M_type = 0;
@ -358,7 +358,7 @@ namespace __gnu_debug
{
_M_variant._M_sequence._M_name = __name;
_M_variant._M_sequence._M_address = &__seq;
#ifdef __GXX_RTTI
#if __cpp_rtti
_M_variant._M_sequence._M_type = &typeid(_Sequence);
#else
_M_variant._M_sequence._M_type = 0;

20
libstdc++-v3/include/experimental/any
View File

@ -74,7 +74,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
[[gnu::noreturn]] inline void __throw_bad_any_cast()
{
#ifdef __EXCEPTIONS
#if __cpp_exceptions
throw bad_any_cast{};
#else
__builtin_abort();
@ -111,7 +111,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
_Manager_internal<_Tp>,
_Manager_external<_Tp>>;
#ifdef __GXX_RTTI
#if __cpp_rtti
// When RTTI is disabled __any_caster assumes the manager is either
// _Manager_internal or _Manager_external, so this type must not be used.
template<typename _Tp, typename _Alloc>
@ -169,7 +169,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template <typename _Allocator>
any(allocator_arg_t, const _Allocator&) noexcept : any() { }
#ifdef __GXX_RTTI
#if __cpp_rtti
/// Construct with a copy of @p __value as the contained object.
template <typename _Allocator, typename _ValueType,
typename _Tp = _Decay<_ValueType>,
@ -249,7 +249,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
/// Reports whether there is a contained object or not.
bool empty() const noexcept { return _M_manager == nullptr; }
#ifdef __GXX_RTTI
#if __cpp_rtti
/// The @c typeid of the contained object, or @c typeid(void) if empty.
const type_info& type() const noexcept
{
@ -281,7 +281,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Tp>
friend void* __any_caster(const any* __any)
{
#ifdef __GXX_RTTI
#if __cpp_rtti
if (__any->type() != typeid(_Tp))
return nullptr;
#else
@ -335,7 +335,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
};
#ifdef __GXX_RTTI
#if __cpp_rtti
// Manage external contained object using an allocator
template<typename _Tp, typename _Alloc>
struct _Manager_alloc
@ -446,7 +446,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
// @}
#ifdef __GXX_RTTI
#if __cpp_rtti
template<typename _Tp, typename _Alloc>
struct any::_Manager_alloc<_Tp, _Alloc>::_Data
{
@ -524,7 +524,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
__arg->_M_obj = const_cast<_Tp*>(__ptr);
break;
case _Op_get_type_info:
#ifdef __GXX_RTTI
#if __cpp_rtti
__arg->_M_typeinfo = &typeid(_Tp);
#endif
break;
@ -550,7 +550,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
__arg->_M_obj = const_cast<_Tp*>(__ptr);
break;
case _Op_get_type_info:
#ifdef __GXX_RTTI
#if __cpp_rtti
__arg->_M_typeinfo = &typeid(_Tp);
#endif
break;
@ -563,7 +563,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
}
#ifdef __GXX_RTTI
#if __cpp_rtti
template<typename _Tp, typename _Alloc>
void
any::_Manager_alloc<_Tp, _Alloc>::

2
libstdc++-v3/include/ext/rope
View File

@ -923,7 +923,7 @@ protected:
~_Rope_self_destruct_ptr()
{ _Rope_RopeRep<_CharT, _Alloc>::_S_unref(_M_ptr); }
#ifdef __EXCEPTIONS
#if __cpp_exceptions
_Rope_self_destruct_ptr() : _M_ptr(0) { };
#else
_Rope_self_destruct_ptr() { };

2
libstdc++-v3/include/ext/ropeimpl.h
View File

@ -1223,7 +1223,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
#endif
__result = _S_concat(__forest[__i], __result);
__forest[__i]->_M_unref_nonnil();
#if !defined(__GC) && defined(__EXCEPTIONS)
#if !defined(__GC) && __cpp_exceptions
__forest[__i] = 0;
#endif
}

10
libstdc++-v3/include/std/functional
View File

@ -1733,7 +1733,7 @@ _GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type)
{
switch (__op)
{
#ifdef __GXX_RTTI
#if __cpp_rtti
case __get_type_info:
__dest._M_access<const type_info*>() = &typeid(_Functor);
break;
@ -1799,7 +1799,7 @@ _GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type)
{
switch (__op)
{
#ifdef __GXX_RTTI
#if __cpp_rtti
case __get_type_info:
__dest._M_access<const type_info*>() = &typeid(_Functor);
break;
@ -1936,7 +1936,7 @@ _GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type)
{
switch (__op)
{
#ifdef __GXX_RTTI
#if __cpp_rtti
case __get_type_info:
__dest._M_access<const type_info*>() = &typeid(_Functor);
break;
@ -2198,7 +2198,7 @@ _GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type)
*/
_Res operator()(_ArgTypes... __args) const;
#ifdef __GXX_RTTI
#if __cpp_rtti
// [3.7.2.5] function target access
/**
* @brief Determine the type of the target of this function object
@ -2271,7 +2271,7 @@ _GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type)
return _M_invoker(_M_functor, std::forward<_ArgTypes>(__args)...);
}
#ifdef __GXX_RTTI
#if __cpp_rtti
template<typename _Res, typename... _ArgTypes>
const type_info&
function<_Res(_ArgTypes...)>::

10
libstdc++-v3/include/tr1/functional
View File

@ -1659,7 +1659,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{
switch (__op)
{
#ifdef __GXX_RTTI
#if __cpp_rtti
case __get_type_info:
__dest._M_access<const type_info*>() = &typeid(_Functor);
break;
@ -1725,7 +1725,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{
switch (__op)
{
#ifdef __GXX_RTTI
#if __cpp_rtti
case __get_type_info:
__dest._M_access<const type_info*>() = &typeid(_Functor);
break;
@ -1859,7 +1859,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{
switch (__op)
{
#ifdef __GXX_RTTI
#if __cpp_rtti
case __get_type_info:
__dest._M_access<const type_info*>() = &typeid(_Functor);
break;
@ -2066,7 +2066,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
*/
_Res operator()(_ArgTypes... __args) const;
#ifdef __GXX_RTTI
#if __cpp_rtti
// [3.7.2.5] function target access
/**
* @brief Determine the type of the target of this function object
@ -2146,7 +2146,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
return _M_invoker(_M_functor, __args...);
}
#ifdef __GXX_RTTI
#if __cpp_rtti
template<typename _Res, typename... _ArgTypes>
const type_info&
function<_Res(_ArgTypes...)>::

4
libstdc++-v3/include/tr1/shared_ptr.h
View File

@ -259,7 +259,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
virtual void*
_M_get_deleter(const std::type_info& __ti)
{
#ifdef __GXX_RTTI
#if __cpp_rtti
return __ti == typeid(_Deleter) ? &_M_del : 0;
#else
return 0;
@ -788,7 +788,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
inline _Del*
get_deleter(const __shared_ptr<_Tp, _Lp>& __p)
{
#ifdef __GXX_RTTI
#if __cpp_rtti
return static_cast<_Del*>(__p._M_get_deleter(typeid(_Del)));
#else
return 0;

2
libstdc++-v3/libsupc++/eh_call.cc
View File

@ -149,7 +149,7 @@ __cxa_call_unexpected(void* exc_obj_in)
}
// If the exception spec allows std::bad_exception, throw that.
#ifdef __EXCEPTIONS
#if __cpp_exceptions
if (bad_exception_allowed)
throw std::bad_exception();
#endif

4
libstdc++-v3/libsupc++/eh_personality.cc
View File

@ -551,7 +551,7 @@ PERSONALITY_FUNCTION (int version,
else if (!foreign_exception)
thrown_ptr = __get_object_from_ue (ue_header);
#else
#ifdef __GXX_RTTI
#if __cpp_rtti
// During forced unwinding, match a magic exception type.
if (actions & _UA_FORCE_UNWIND)
{
@ -777,7 +777,7 @@ __cxa_call_unexpected (void *exc_obj_in)
// If the exception spec allows std::bad_exception, throw that.
// We don't have a thrown object to compare against, but since
// bad_exception doesn't have virtual bases, that's OK; just pass 0.
#if defined(__EXCEPTIONS) && defined(__GXX_RTTI)
#if __cpp_exceptions && __cpp_rtti
const std::type_info &bad_exc = typeid (std::bad_exception);
if (check_exception_spec (&info, &bad_exc, 0, xh_switch_value))
throw std::bad_exception();

2
libstdc++-v3/libsupc++/exception_defines.h
View File

@ -30,7 +30,7 @@
#ifndef _EXCEPTION_DEFINES_H
#define _EXCEPTION_DEFINES_H 1
#ifndef __EXCEPTIONS
#if ! __cpp_exceptions
// Iff -fno-exceptions, transform error handling code to work without it.
# define __try if (true)
# define __catch(X) if (false)

2
libstdc++-v3/libsupc++/exception_ptr.h
View File

@ -168,7 +168,7 @@ namespace std
exception_ptr
make_exception_ptr(_Ex __ex) _GLIBCXX_USE_NOEXCEPT
{
#ifdef __EXCEPTIONS
#if __cpp_exceptions
try
{
throw __ex;

2
libstdc++-v3/libsupc++/guard.cc
View File

@ -203,7 +203,7 @@ namespace __cxxabiv1
static inline void
throw_recursive_init_exception()
{
#ifdef __EXCEPTIONS
#if __cpp_exceptions
throw __gnu_cxx::recursive_init_error();
#else
// Use __builtin_trap so we don't require abort().

2
libstdc++-v3/libsupc++/pbase_type_info.cc
View File

@ -37,7 +37,7 @@ __do_catch (const type_info *thr_type,
if (*this == *thr_type)
return true; // same type
#ifdef __GXX_RTTI
#if __cpp_rtti
if (typeid (*this) != typeid (*thr_type))
return false; // not both same kind of pointers
#endif

2
libstdc++-v3/libsupc++/pointer_type_info.cc
View File

@ -40,7 +40,7 @@ __pointer_catch (const __pbase_type_info *thrown_type,
void **thr_obj,
unsigned outer) const
{
#ifdef __GXX_RTTI
#if __cpp_rtti
if (outer < 2 && *__pointee == typeid (void))
{
// conversion to void

2
libstdc++-v3/libsupc++/vterminate.cc
View File

@ -78,7 +78,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// If the exception is derived from std::exception, we can
// give more information.
__try { __throw_exception_again; }
#ifdef __EXCEPTIONS
#if __cpp_exceptions
__catch(const exception& exc)
{
char const *w = exc.what();

2
libstdc++-v3/src/c++11/thread.cc
View File

@ -130,7 +130,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
thread::_M_start_thread(__shared_base_type __b)
{
if (!__gthread_active_p())
#if __EXCEPTIONS
#if __cpp_exceptions
throw system_error(make_error_code(errc::operation_not_permitted),
"Enable multithreading to use std::thread");
#else