Forced "time" feature on windows causes unexpected behaviour

[exFalso]

In one of our projects we use mbedtls with time support explicitly switched off. (Context: we are deliberately verifying x509 certificates which have expired validity)

We use this project to produce python packages for various platforms, including windows. We were surprised to find that time validity checks kept failing on windows even though the feature was switched off, and it took some time to track it down to these mysterious lines:

rust-mbedtls/mbedtls/Cargo.toml

Lines 69 to 73 in 68fdeb6

	# feature 'time` is necessary under windows
	[target.'cfg(target_env = "msvc")'.dependencies]
	mbedtls-platform-support = { version = "0.1", path = "../mbedtls-platform-support", features = [
	"time",
	] }

We worked around this with an internal fork, but we wonder why these lines are there in the first place? mbedtls seems to build fine with MBEDTLS_HAVE_TIME + MBEDTLS_HAVE_TIME_DATE undefined?