libstdc++-v3/ChangeLog:
PR libstdc++/97729
* config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Add exports.
* src/c++20/sstream-inst.cc (basic_stringbuf): Instantiate
private constructor taking __xfer_bufptrs.
# basic_stringbuf::basic_stringbuf(basic_stringbuf&&, allocator const&)
_ZNSt7__cxx1115basic_stringbufI[cw]St11char_traitsI[cw]ESaI[cw]EEC[12]EOS4_RKS3_;
+ _ZNSt7__cxx1115basic_stringbufI[cw]St11char_traitsI[cw]ESaI[cw]EEC[12]EOS4_RKS3_ONS4_14__xfer_bufptrsE;
# basic_stringbuf::get_allocator()
_ZNKSt7__cxx1115basic_stringbufI[cw]St11char_traitsI[cw]ESaI[cw]EE13get_allocatorEv;
ios_base::openmode);
template basic_stringbuf<char>::basic_stringbuf(basic_stringbuf&&,
const allocator_type&);
+template basic_stringbuf<char>::basic_stringbuf(basic_stringbuf&&,
+ const allocator_type&,
+ __xfer_bufptrs&&);
template basic_stringbuf<char>::allocator_type
basic_stringbuf<char>::get_allocator() const noexcept;
template string_view
ios_base::openmode);
template basic_stringbuf<wchar_t>::basic_stringbuf(basic_stringbuf&&,
const allocator_type&);
+template basic_stringbuf<wchar_t>::basic_stringbuf(basic_stringbuf&&,
+ const allocator_type&,
+ __xfer_bufptrs&&);
template basic_stringbuf<wchar_t>::allocator_type
basic_stringbuf<wchar_t>::get_allocator() const noexcept;