[Bug libstdc++/104167] Implement C++20 std::chrono::utc_clock, std::chrono::tzdb etc.

["clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104167

Christophe Lyon <clyon at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |clyon at gcc dot gnu.org

--- Comment #8 from Christophe Lyon <clyon at gcc dot gnu.org> ---
On arm-eabi targets (thus, using newlib), we've noticed new errors:

FAIL: std/time/clock/gps/io.cc (test for excess errors)
UNRESOLVED: std/time/clock/gps/io.cc compilation failed to produce executable
FAIL: std/time/clock/tai/io.cc (test for excess errors)
UNRESOLVED: std/time/clock/tai/io.cc compilation failed to produce executable

The logs say:
FAIL: std/time/clock/gps/io.cc (test for excess errors)
Excess errors:
ld: /arm-eabi/libstdc++-v3/src/.libs/libstdc++.a(fs_ops.o): in function
`std::filesystem::current_path(std::filesystem::__cxx11::path const&,
std::error_code&)':
/libstdc++-v3/src/c++17/fs_ops.cc:806:(.text._ZNSt10filesystem12current_pathERKNS_7__cxx114pathE+0x10):
undefined reference to `chdir'
ld:
/libstdc++-v3/src/c++17/fs_ops.cc:806:(.text._ZNSt10filesystem12current_pathERKNS_7__cxx114pathERSt10error_code+0x6):
undefined reference to `chdir'
ld: /arm-eabi/libstdc++-v3/src/.libs/libstdc++.a(fs_ops.o): in function
`(anonymous namespace)::create_dir(std::filesystem::__cxx11::path const&,
std::filesystem::perms, std::error_code&)':
/libstdc++-v3/src/c++17/fs_ops.cc:583:(.text._ZN12_GLOBAL__N_110create_dirERKNSt10filesystem7__cxx114pathENS0_5permsERSt10error_code+0xa):
undefined reference to `mkdir'
ld: /arm-eabi/libstdc++-v3/src/.libs/libstdc++.a(fs_ops.o): in function
`std::filesystem::create_directory(std::filesystem::__cxx11::path const&,
std::error_code&)':
/libstdc++-v3/src/c++17/fs_ops.cc:583:(.text._ZNSt10filesystem16create_directoryERKNS_7__cxx114pathERSt10error_code+0xe):
undefined reference to `mkdir'
ld: /arm-eabi/libstdc++-v3/src/.libs/libstdc++.a(fs_ops.o): in function
`std::filesystem::permissions(std::filesystem::__cxx11::path const&,
std::filesystem::perms, std::filesystem::perm_options, std::error_code&)':
/libstdc++-v3/src/c++17/fs_ops.cc:1134:(.text._ZNSt10filesystem11permissionsERKNS_7__cxx114pathENS_5permsENS_12perm_optionsERSt10error_code+0x7c):
undefined reference to `chmod'
ld:
/libstdc++-v3/src/c++17/fs_ops.cc:1134:(.text._ZNSt10filesystem11permissionsERKNS_7__cxx114pathENS_5permsENS_12perm_optionsERSt10error_code+0x9c):
undefined reference to `chmod'
ld: /arm-eabi/libstdc++-v3/src/.libs/libstdc++.a(fs_ops.o): in function
`std::filesystem::current_path[abi:cxx11](std::error_code&)':
/libstdc++-v3/src/c++17/fs_ops.cc:750:(.text._ZNSt10filesystem12current_pathB5cxx11ERSt10error_code+0x22):
undefined reference to `pathconf'
ld:
/libstdc++-v3/src/c++17/fs_ops.cc:769:(.text._ZNSt10filesystem12current_pathB5cxx11ERSt10error_code+0x54):
undefined reference to `getcwd'
ld: /arm-eabi/libstdc++-v3/src/.libs/libstdc++.a(fs_ops.o): in function
`std::filesystem::do_copy_file(char const*, char const*,
std::filesystem::copy_options_existing_file, stat*, stat*, std::error_code&)':
/libstdc++-v3/src/c++17/../filesystem/ops-common.h:553:(.text._ZNSt10filesystem12do_copy_fileEPKcS1_NS_26copy_options_existing_fileEP4statS4_RSt10error_code+0x114):
undefined reference to `chmod'
collect2: error: ld returned 1 exit status


BTW I noticed the same error messages for other tests (eg.
std/time/clock/gps/1.cc)