Date: Wed, 10 Jul 2019 21:01:46 +0200 From: Jan Beich <jbeich@FreeBSD.org> To: Yuri <yuri@rawbw.com> Cc: "ports\@freebsd.org" <ports@freebsd.org> Subject: Re: 12.0-RELEASE-p7 doesn't contain std::filesystem that has been added to 12.0-STABLE some time later Message-ID: <a7dl-lnmt-wny@FreeBSD.org> In-Reply-To: <9080c5f5-9d0c-2086-bd2c-57c409fffe3a@rawbw.com> (yuri@rawbw.com's message of "Wed, 10 Jul 2019 11:23:15 -0700") References: <1eac89d9-babe-7069-8c4b-2fbe53234fcd@rawbw.com> <sgre-m0pg-wny@FreeBSD.org> <9080c5f5-9d0c-2086-bd2c-57c409fffe3a@rawbw.com>
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Yuri <yuri@rawbw.com> writes:
> On 2019-07-10 07:19, Jan Beich wrote:
>
>> C++ example:
>>
>> #if __cplusplus >= 201703L && __has_include(<filesystem>)
>> #include <filesystem>
>> #else
>> #include <experimental/filesystem>
>> namespace std {
>> namespace filesystem = experimental::filesystem;
>> }
>> #endif
>>
>> Makefile example:
>>
>> .if exists(/usr/lib/libc++fs.a)
>> LIBS+= -lc++fs
>> .elif exists(/usr/lib/libc++experimental.a)
>> # XXX Remove after FreeBSD 12.0 EOL
>> LIBS+= -lc++experimental
>> .else
>> # XXX Remove after FreeBSD 11.2 EOL
>> USE_GCC= yes
>> LIBS+= -lstdc++fs
>> .endif
>
>
> This helps with locating the header/library, but it fails to compile
> in poudriere on 12.0-RELEASE-p7:
>
> x.cpp:213:15: error: no member named 'is_symlink' in
> 'std::experimental::filesystem::v1::directory_entry'
> if (entry.is_symlink())
> ~~~~~ ^
Convert "entry.is_symlink()" to "std::filesystem::is_symlink(entry)"
> It looks like 12.0-RELEASE-p7 is technically broken, because it
> doesn't include is_symlink().
is_symlink() exists but not as a member function of directory_entry
under std::experimental namespace. Same is true even for newer versions
of libc++ or libstdc++.
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