The ftime() function has been deprecated since POSIX-1-2004, and
removed in POSIX.1-2008. It's also been deprecated/removed in glibc
since 2.33. POSIX has always said the function is not portable, and
its return value, timezone, and dstflag fields are unspecified. Even
if Linux/glibc & m32r had defined behavior, those aren't the host for
the sim runtime.
So let's stop using the function and switch to clock_gettime. gnulib
already has detection support for it, and it's been around since at
least POSIX-1-2004.
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