https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97798
Bug ID: 97798
Summary: FTB msp430-elf error: the value of
'__gnu_cxx::__numeric_traits_integer<__int20>::__max'
is not usable in a constant expression
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jozefl at gcc dot gnu.org
Target Milestone: ---
GCC fails to build for msp430-elf since:
commit c2856ceec2e7542fe9b0bf104afeeeeb57d6996d
Author: Marek Polacek <pola...@redhat.com>
Date: Thu Oct 29 15:19:51 2020 -0400
c++: Tweaks for value_dependent_expression_p.
There is an error building libstdc++ for the -mlarge multilib, which uses
__int20 pointers:
> In file included from
> /home/jozef/msp430/gcc/build-msp430/msp430-elf/large/libstdc++-v3/include/sstream:38,
> from
> ../../../../../../libstdc++-v3/src/c++20/sstream-inst.cc:30:
> /home/jozef/msp430/gcc/build-msp430/msp430-elf/large/libstdc++-v3/include/istream:
> In function 'std::basic_istream<_CharT, _Traits>&
> std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT (&)[_Num])':
> /home/jozef/msp430/gcc/build-msp430/msp430-elf/large/libstdc++-v3/include/istream:840:26:
> error: non-constant condition for static assertion
> 840 | static_assert(_Num <=
> __gnu_cxx::__numeric_traits<streamsize>::__max);
> |
> ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> /home/jozef/msp430/gcc/build-msp430/msp430-elf/large/libstdc++-v3/include/istream:840:26:
> error: the value of '__gnu_cxx::__numeric_traits_integer<__int20>::__max' is
> not usable in a constant expression
> In file included from
> /home/jozef/msp430/gcc/build-msp430/msp430-elf/large/libstdc++-v3/include/bits/stl_algobase.h:63,
> from
> /home/jozef/msp430/gcc/build-msp430/msp430-elf/large/libstdc++-v3/include/bits/char_traits.h:39,
> from
> /home/jozef/msp430/gcc/build-msp430/msp430-elf/large/libstdc++-v3/include/ios:40,
> from
> /home/jozef/msp430/gcc/build-msp430/msp430-elf/large/libstdc++-v3/include/istream:38,
> from
> /home/jozef/msp430/gcc/build-msp430/msp430-elf/large/libstdc++-v3/include/sstream:38,
> from
> ../../../../../../libstdc++-v3/src/c++20/sstream-inst.cc:30:
> /home/jozef/msp430/gcc/build-msp430/msp430-elf/large/libstdc++-v3/include/ext/numeric_traits.h:78:27:
> note: '__gnu_cxx::__numeric_traits_integer<__int20>::__max' was not
> initialized with a constant expression
> 78 | static const _Value __max = __glibcxx_max(_Value);
> | ^~~~~
> make[9]: *** [Makefile:550: sstream-inst.lo] Error 1
Configured with:
> ../configure --target=msp430-elf --enable-languages=c,c++ --disable-nls
> --disable-no-exceptions --disable-full-memory-range
