https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86245
Bug ID: 86245
Summary: _GLIBCXX_LONG_DOUBLE_COMPAT GLIBCXX_3.4.21 issues
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
Target Milestone: ---
The powerpc64-linux basic_symbols.txt shows a couple of problematic symbols:
FUNC:_ZNKSt7__cxx119money_getIcSt19istreambuf_iteratorIcSt11char_traitsIcEEE3getES4_S4_bRSt8ios_baseRSt12_Ios_IostateRg@@GLIBCXX_3.4.21
FUNC:_ZNKSt7__cxx119money_getIcSt19istreambuf_iteratorIcSt11char_traitsIcEEE6do_getES4_S4_bRSt8ios_baseRSt12_Ios_IostateRg@@GLIBCXX_3.4.21
FUNC:_ZNKSt7__cxx119money_getIwSt19istreambuf_iteratorIwSt11char_traitsIwEEE3getES4_S4_bRSt8ios_baseRSt12_Ios_IostateRg@@GLIBCXX_3.4.21
FUNC:_ZNKSt7__cxx119money_getIwSt19istreambuf_iteratorIwSt11char_traitsIwEEE6do_getES4_S4_bRSt8ios_baseRSt12_Ios_IostateRg@@GLIBCXX_3.4.21
FUNC:_ZNKSt7__cxx119money_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE3putES4_bRSt8ios_basecg@@GLIBCXX_3.4.21
FUNC:_ZNKSt7__cxx119money_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE6do_putES4_bRSt8ios_basecg@@GLIBCXX_3.4.21
FUNC:_ZNKSt7__cxx119money_putIwSt19ostreambuf_iteratorIwSt11char_traitsIwEEE3putES4_bRSt8ios_basewg@@GLIBCXX_3.4.21
FUNC:_ZNKSt7__cxx119money_putIwSt19ostreambuf_iteratorIwSt11char_traitsIwEEE6do_putES4_bRSt8ios_basewg@@GLIBCXX_3.4.21
One issue is that those really should have been added in the
_GLIBCXX_LONG_DOUBLE_COMPAT != 0 configurations to GLIBCXX_LDBL_3.4.21 symver
rather than GLIBCXX_3.4.21. Perhaps it is a waste to add alias for those
though and we can just live with that glitch. The bigger problem is that using
those symbols will not work in programs compiled with -mlong-double-64, because
nothing exports the corresponding e mangled symbols. I think that needs
fixing, either they can be implemented with a double argument and aliases (and
make the d mangled symbols hidden), or in separate source files that are
compiled with -mlong-double-64.
