[flang-commits] [flang] [Flang] Add a Fortran Standards Support doc (PR #132195)

[Tarun Prabhu via flang-commits]

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+<!--===- docs/FortranStandardsSupport.md 
+  
+   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+   See https://llvm.org/LICENSE.txt for license information.
+   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+  
+-->
+
+# Flang's Fortran standards support
+
+```{contents}
+---
+local:
+---
+```
+
+This document summarizes Flang's Fortran standards support. The information is only provided as a guideline. The compiler emits
+TODOs/Not Yet Implemented messages for unimplemented features and that should be treated as the authoratative information. 
+Standards support is provided upto Fortran 2008 for now. It will be later extended for Fortran 2018 and Fortran 2023.
----------------
tarunprabhu wrote:

```suggestion
Standards support is provided upto Fortran 2008 for now. It will be extended later for Fortran 2018 and Fortran 2023.
```

https://github.com/llvm/llvm-project/pull/132195