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[flang] Make interactive behaviour more obvious
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Authored by richard.barton.arm on Jul 29 2020, 8:36 AM.

Details

Summary

When flang is invoked with no files it waits for input on stdin. Make it
print a message saying this to prevent the user being surprised.

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DavidTruby accepted this revision.Jul 31 2020, 6:06 AM

LGTM after clang-format fixes

This revision is now accepted and ready to land.Jul 31 2020, 6:06 AM

Fix clang-format error.