nicole mazzuca 22623e3501 [vcpkg] Clean up CMake build system (#10834) ... There are quite a few changes to the CMake build system packaged up into one set here: * Added `toolsrc/cmake/utilities.cmake`, which contains the following: * `vcpkg_detect_compiler` -- get the name of the C++ compiler, as one of {gcc, clang, msvc} * `vcpkg_detect_standard_library` -- get the name of the standard library we're linking to, as one of {libstdc++, libc++, msvc-stl} * `vcpkg_detect_std_filesystem` -- figure out how to link and call into C++17's filesystem; whether one needs to link to `stdc++fs` or `c++fs`, and whether to use `<filesystem>` or `<experimental/filesystem>`. * Added a `VCPKG_WARNINGS_AS_ERRORS`, split off from `VCPKG_DEVELOPMENT_WARNINGS`, which allows one to use the development warnings without passing -Werror * Rename `DEFINE_DISABLE_METRICS` to `VCPKG_DISABLE_METRICS` -- the former will now print a deprecation message and set the latter. * Now, print a deprecation message on `WERROR`; it doesn't do anything since the behavior it requested is now the default. * Pass `-std=c++17` if the compiler allows it, instead of `-std=c++1z` * Do some code movement * Pass `USE_STD_FILESYSTEM` if possible, instead of only on minGW * Renamed to `VCPKG_USE_STD_FILESYSTEM` Additionally, we now pass `/W4` in Debug mode on x86 in the Visual Studio build system; this brings it in line with the CMake build system, and the x64 Visual Studio build system. And finally, we make some minor code changes to support compiling in VCPKG_DEVELOPMENT_WARNINGS mode.		2020-04-14 22:08:50 -07:00
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utilities.cmake	[vcpkg] Clean up CMake build system (#10834)	2020-04-14 22:08:50 -07:00