zig cc -Wno-everything src/ctest.c

c:zigctest>zig build

Zig is unable to provide a libc for the chosen target 'x86_64-unknown-windows-msvc'.
The target is non-native, so Zig also cannot use the native libc installation.
Choose a target which has a libc available, or provide a libc installation text file.
See `zig libc --help` for more details.
The following command exited with error code 1:
c:zigctestzig.exe build-exe --library c --c-source -Wno-everything -DNO_TIMER C:zigctestsrcctest.c --cache-dir C:zigctestzig-cache --name triangle -target x86_64-windows-msvc --cache on
exec failed
C:zigctestlibzigstdbuild.zig:768:36: 0x7ff76fece654 in std.build.Builder::std.build.Builder.exec (build.obj)
                    std.debug.panic("exec failed")
...

...
const cflags = [][]const u8{
"-Wno-everything",
};

const exe = b.addExecutable("triangle", null);
exe.linkSystemLibrary("c");
exe.setBuildMode(mode);
exe.setTarget(builtin.Arch.x86_64, .windows, .msvc);
exe.addCSourceFile("src/ctest.c",cflags);
...