undefined symbol: SHGetKnownFolderPath, when compile code with clang target=x86_64-pc-windows-msvc

[denchat]

I tried compile my code agaist tz.lib using clang target msvc.

lld-link: error: undefined symbol: SHGetKnownFolderPath
>>> referenced by tz.lib(tz.cpp.obj):(bool __cdecl date::remote_install(class std::basic_string<char, struct std::char_traits<char>, class std::allocator<char>> const
&))
clang++: error: linker command failed with exit code 1 (use -v to see invocation)

Perhaps other than -lole32 (in documentation), now tz.lib also requires -lshell32 on windows?
Is it just because that mingw64 automatically links agaist shell32.lib by default?

[HowardHinnant]

I'm not sure. I do see that SHGetKnownFolderPath is used in tz.cpp, and I note this comment:

// None of this happens with the MS SDK (at least VS14 which I tested), but:
// Compiling with mingw, we get "error: 'KF_FLAG_DEFAULT' was not declared in this scope."
// and error: 'SHGetKnownFolderPath' was not declared in this scope.".
// It seems when using mingw NTDDI_VERSION is undefined and that
// causes KNOWN_FOLDER_FLAG and the KF_ flags to not get defined.
// So we must define NTDDI_VERSION to get those flags on mingw.
// The docs say though here:
// https://msdn.microsoft.com/en-nz/library/windows/desktop/aa383745(v=vs.85).aspx
// that "If you define NTDDI_VERSION, you must also define _WIN32_WINNT."
// So we declare we require Vista or greater.

I don't have Windows to test on.

[denchat]

SHGetKnownFolderPath on this page
https://docs.microsoft.com/en-us/windows/desktop/api/shlobj_core/nf-shlobj_core-shgetknownfolderpath

SDK API requires: Vista
defined in header: shlobj_core.h
DLL: Shell32.dll (version 6.0.6000++)