This makes libc++'s <filesystem> tests compatible with MSVC's STL.
In msvc_stdlib_force_include.h, we need to define 3 more macros:
- _CRT_DECLARE_NONSTDC_NAMES activates the POSIX names of
`getcwd` etc. As the comment explains, we need this because
we test with Clang `-fno-ms-compatibility`, which defines
`__STDC__` to `1`, which causes the UCRT headers to disable
the POSIX names by default.
- Then we need _CRT_NONSTDC_NO_WARNINGS to avoid emitting
deprecation warnings about the POSIX names.
- Finally, we need `NOMINMAX` to seal away the ancient evil.
These macros are documented in https://learn.microsoft.com/en-us/cpp/c-runtime-library/compatibility?view=msvc-170.
As a drive-by change, the patch adds a "simulated" macro for
__has_feature(hwaddress_sanitizer). It also clang-formats all
of msvc_stdlib_force_include.h and removes guards for
__has_builtin(__builtin_source_location) in <source_location>,
since those are not needed anymore.
AppleClang 1403 has some bugs that prevent std::source_location from
working properly on it. Consequently, we XFAILed the unit test for
source_location with that compiler. However, we should also avoid
advertising that the feature is supported on that compiler, otherwise
our feature-test macros lie. This was noticed to break Boost.Asio
when building with a recent libc++ and AppleClang 14.0.3.
rdar://106863087
Differential Revision: https://reviews.llvm.org/D146837
