The project does not compile with GCC 7

[chfast]

Describe the bug

/home/builder/build/test/bench/filesystem.hpp: In instantiation of 'ghc::filesystem::path::path(const Source&, ghc::filesystem::path::format) [with Source = std::basic_string_view<char>; <template-parameter-1-2> = ghc::filesystem::path]':
/home/builder/build/test/bench/filesystem.hpp:2409:35:   required from here
/home/builder/build/test/bench/filesystem.hpp:1455:27: error: no matching function for call to 'toUtf8(const std::basic_string_view<char>&)'
     : _path(detail::toUtf8(source))
             ~~~~~~~~~~~~~~^~~~~~~~
/home/builder/build/test/bench/filesystem.hpp:1342:20: note: candidate: template<class charT, class traits, class Alloc, typename std::enable_if<(sizeof (charT) == 1), int>::type size> std::__cxx11::string ghc::filesystem::detail::toUtf8(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
 inline std::string toUtf8(const std::basic_string<charT, traits, Alloc>& unicodeString)
                    ^~~~~~
/home/builder/build/test/bench/filesystem.hpp:1342:20: note:   template argument deduction/substitution failed:
/home/builder/build/test/bench/filesystem.hpp:1455:27: note:   'const std::basic_string_view<char>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
     : _path(detail::toUtf8(source))
             ~~~~~~~~~~~~~~^~~~~~~~

To Reproduce
Compile with G++ 7 on Debian.

Expected behavior
Compiles.

Additional context
The GCC7 seems to be missing string_view or is not included.

[gulrak]

Hi, guessing from the line numbers and std::string_view, it looks like the version you are testing is the release version v1.2.4, which is the latest release, and you are compiling with -std=c++17.
v1.2.4 is not including #25, that brings the missing string_view specialization when compiling with at least c++17, so my guess is, it should work with the current master.
I didn't make a new release yet, as I first want to finish work on #27, so maybe around the next weekend. If possible, it would be cool if you could check if your code works with the current master version.

[chfast]

Yes, it builds with master.