Re: gdb - undefined reference to `std::__1::codecvt<char, char, int>::id'

[Kamil Rytarowski <kamil%netbsd.org@localhost>]

On 29.09.2020 16:09, Roy Marples wrote:
> #      link  gdb/gdb
> /usr/tools/bin/x86_64--netbsd-clang++    --sysroot=/
> -Wl,--warn-shared-textrel -Wl,-z,relro   -pie      -o gdb  gdb.o 
> -Wl,-rpath-link,/lib  -L=/lib
> -L/home/roy/src/hg/src/external/gpl3/gdb/lib/libgdb/obj.amd64 -lgdb
> -L/home/roy/src/hg/src/external/gpl3/gdb/lib/libopcodes/obj.amd64
> -lopcodes -L/home/roy/src/hg/src/external/gpl3/gdb/lib/libbfd/obj.amd64
> -lbfd
> -L/home/roy/src/hg/src/external/gpl3/gdb/lib/libdecnumber/obj.amd64
> -ldecnumber
> -L/home/roy/src/hg/src/external/gpl3/gdb/lib/libgdbsupport/obj.amd64
> -lgdbsupport 
> -L/home/roy/src/hg/src/external/gpl3/gdb/lib/libctf/obj.amd64 -lctf 
> -L/home/roy/src/hg/src/external/gpl3/gdb/lib/libgnulib/obj.amd64
> -lgnulib
>  -L/home/roy/src/hg/src/external/gpl3/gdb/lib/libreadline/obj.amd64
> -lreadline -lterminfo 
> -L/home/roy/src/hg/src/external/gpl3/gdb/lib/libiberty/obj.amd64
> -liberty -lexpat -llzma -lz -lcurses -lintl -lm -lkvm -lutil
> /usr/tools/bin/x86_64--netbsd-ld:
> /home/roy/src/hg/src/external/gpl3/gdb/lib/libgdb/obj.amd64/libgdb.a(string_view-selftests.o):
> in function `std::__1::basic_filebuf<char, std::__1::char_traits<char>
>>::basic_filebuf()':
> string_view-selftests.c:(.text._ZNSt3__113basic_filebufIcNS_11char_traitsIcEEEC2Ev[_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEEC2Ev]+0x94):
> undefined reference to `std::__1::codecvt<char, char, int>::id'
> /usr/tools/bin/x86_64--netbsd-ld:
> string_view-selftests.c:(.text._ZNSt3__113basic_filebufIcNS_11char_traitsIcEEEC2Ev[_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEEC2Ev]+0xc4):
> undefined reference to `std::__1::codecvt<char, char, int>::id'
> /usr/tools/bin/x86_64--netbsd-ld:
> /home/roy/src/hg/src/external/gpl3/gdb/lib/libgdb/obj.amd64/libgdb.a(string_view-selftests.o):
> in function `std::__1::basic_filebuf<char, std::__1::char_traits<char>
>>::imbue(std::__1::locale const&)':
> string_view-selftests.c:(.text._ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE5imbueERKNS_6localeE[_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE5imbueERKNS_6localeE]+0x13):
> undefined reference to `std::__1::codecvt<char, char, int>::id'
> x86_64--netbsd-clang: error: linker command failed with exit code 1 (use
> -v to see invocation)
> *** Error code 1
> 
> What went wrong?
> My very limited knowledge of C++ and google foo says codecvt should be
> part of libc++?
> 
> Roy

The basesystem libc++ is too old for C++ applications like GDB.

A workaround is to force old GDB.

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