[PATCH] D97119: [flang][driver] Add options for -std=2018

[Arnamoy B via Phabricator via cfe-commits]

arnamoy10 created this revision.
arnamoy10 added reviewers: awarzynski, sscalpone, clementval, tskeith.
Herald added subscribers: jansvoboda11, dang.
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Add support for the following Fortran dialect options:

-std=2018

It also adds one test cases.  Currently only `2018` is allowed as the standard.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D97119

Files:
  clang/include/clang/Driver/Options.td
  clang/lib/Driver/ToolChains/Flang.cpp
  flang/include/flang/Frontend/CompilerInvocation.h
  flang/lib/Frontend/CompilerInvocation.cpp
  flang/test/Flang-Driver/driver-help-hidden.f90
  flang/test/Flang-Driver/driver-help.f90
  flang/test/Flang-Driver/std2018.f90

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