[PATCH] D95460: [flang][driver] Add forced form flags and -ffixed-line-length

[Faris via Phabricator via cfe-commits]

FarisRehman created this revision.
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Add support for the following layout options:

- -ffree-form
- -ffixed-form
- -ffixed-line-length-n

The default fixed line length is 72, based off the current default.

This patch does not add `-ffree-line-length-n` as Fortran::parser::Options does not have a variable for free form columns.
Whilst `fixedFormColumns` variable is used in f18 for `-ffree-line-length-n`, f18 only allows `-ffree-line-length-none`/`-ffree-line-length-0` and not a user-specified value. `fixedFormcolumns` cannot be used in the new driver as it is ignored in the frontend when dealing with free form files.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D95460

Files:
  clang/include/clang/Driver/Options.td
  clang/lib/Driver/ToolChains/Flang.cpp
  flang/include/flang/Frontend/FrontendOptions.h
  flang/lib/Frontend/CompilerInstance.cpp
  flang/lib/Frontend/CompilerInvocation.cpp
  flang/test/Flang-Driver/Inputs/fixed-form-test.f
  flang/test/Flang-Driver/Inputs/fixed-line-length-test.f
  flang/test/Flang-Driver/driver-help-hidden.f90
  flang/test/Flang-Driver/driver-help.f90
  flang/test/Flang-Driver/fixed-free-flag.f90
  flang/test/Flang-Driver/fixed-line-length.f90

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