https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89105
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-01-29
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is seen while building libstdc++.so but is harmless and can be ignored:
/home/jwakely/src/gcc/gcc/libstdc++-v3/src/c++17/fs_ops.cc: In function
‘uintmax_t std::filesystem::file_size(const std::filesystem::__cxx11::path&,
std::error_code&)’:
/home/jwakely/src/gcc/gcc/libstdc++-v3/src/c++17/fs_ops.cc:954:68: warning:
empty class ‘std::filesystem::file_size(const std::filesystem::__cxx11::path&,
std::error_code&)::<lambda(const auto:1&)>’ parameter passing ABI changes in
-fabi-version=12 (GCC 8) [-Wabi]
954 | auto s = do_stat(p, ec, [](const auto& st) { return S{st}; }, S{});
| ^
/home/jwakely/src/gcc/gcc/libstdc++-v3/src/c++17/fs_ops.cc: In function ‘T
{anonymous}::do_stat(const std::filesystem::__cxx11::path&, std::error_code&,
Accessor, T) [with Accessor = std::filesystem::file_size(const
std::filesystem::__cxx11::path&, std::error_code&)::<lambda(const auto:1&)>; T
= std::filesystem::file_size(const std::filesystem::__cxx11::path&,
std::error_code&)::S]’:
/home/jwakely/src/gcc/gcc/libstdc++-v3/src/c++17/fs_ops.cc:925:5: warning:
empty class ‘std::filesystem::file_size(const std::filesystem::__cxx11::path&,
std::error_code&)::<lambda(const auto:1&)>’ parameter passing ABI changes in
-fabi-version=12 (GCC 8) [-Wabi]
925 | do_stat(const fs::path& p, std::error_code& ec, Accessor f, T
deflt)
| ^~~~~~~
It can't be suppressed with a pragma (PR 87611).
