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To:	djgpp AT delorie DOT com
From:	"J.W. Jagersma (jwjagersma AT gmail DOT com) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
Subject:	missing errnos for std::filesystem
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Date:	Wed, 25 Jul 2018 17:56:28 +0200
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I tried building a recent gcc snapshot today, but was unable to compile 
std::filesystem support due to some missing constants in std::errc.

../../../../../libstdc++-v3/src/filesystem/ops.cc: In function 
'uintmax_t std::experimental::filesystem::v1::file_size(const 
std::experimental::filesystem::v1::__cxx11::path&, std::error_code&)':
../../../../../libstdc++-v3/src/filesystem/ops.cc:790:39: error: 
'not_supported' is not a member of 'std::errc'
   ec = std::make_error_code(std::errc::not_supported);
                                        ^~~~~~~~~~~~~
../../../../../libstdc++-v3/src/filesystem/ops.cc: In function 'void 
std::experimental::filesystem::v1::permissions(const 
std::experimental::filesystem::v1::__cxx11::path&, 
std::experimental::filesystem::v1::perms, std::error_code&)':
../../../../../libstdc++-v3/src/filesystem/ops.cc:940:42: error: 
'operation_not_supported' is not a member of 'std::errc'
      ec = std::make_error_code(std::errc::operation_not_supported);
                                           ^~~~~~~~~~~~~~~~~~~~~~~

The corresponding C macros are ENOTSUP and EOPNOTSUP. Can these be added 
to djgpp's errno.h?

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