Some tests are limited to only Linux, when they should also pass for
Android.
Additionally, InputStream.swift.gyb was disabled for Android ARMv7, but
wasn't for Android AArch64, which allow me to find the error on it and
fix it on #24521.
Finally, StringLowercasedUppercased is interesting in Android because it
checks the used ICU is correct for performing the tasks that the stdlib
needs.
For Swift 3 / 4:
Deprecate the spelling "ImplicitlyUnwrappedOptional", emitting a warning
and suggesting "!" in places where they are allowed according to
SE-0054.
In places where SE-0054 disallowed IUOs but we continued to accept them
in previous compilers, emit a warning suggesting "Optional" or "?" as
an alternative depending on context and treat the IUO as an Optional,
noting this in the diagnostic.
For Swift 5:
Treat "ImplicitlyUnwrappedOptional" as an error, suggesting
"!" in places where they are allowed by SE-0054.
In places where SE-0054 disallowed IUOs, emit an error suggestion
"Optional" or "?" as an alternative depending on context.
validation-test/stlib/Glibc.swift was failing on powerpc64le due to the
missing TIOCGWINSZ symbol. Since (from what I can tell) this is just a
random tty ioctl, replace it with a different ioctl that should be more
commonly defined.
Signed-off-by: Russell Currey <ruscur@russell.cc>
This is needed if we compile StdlibUnittest with -sil-serialize-all
So far I added the imports only in files which needed them. But this may change, depending on the optimizer (inlining).
Adding them in all files doesn't harm and avoids confusion if someone makes an unrelated change which would result in such a linker error.
