[PATCH] D97119: [flang][driver] Add options for -std=f2018

[Andrzej Warzynski via Phabricator via cfe-commits]

awarzynski accepted this revision.
awarzynski added a comment.
This revision is now accepted and ready to land.

Thank you for updating this @arnamoy10!

One thing worth pointing out - this patch adds `-pedantic` rather than `-fpendatic` as @richard.barton.arm suggested. That was clearly a typo, so everything is good.

IMO this is ready to land provided that:

- the test is updated to work with `f18`
- summary/commit message is updated to reflect the recent changes (i.e. that this patch adds `-std=f2018` AND `-pedantic`)

These are small changes and I'm happy for you to apply them when merging (rather than updating here first).



================
Comment at: flang/lib/Frontend/CompilerInvocation.cpp:375
+
+  //-fpedantic
+  if (args.hasArg(clang::driver::options::OPT_pedantic)) {
----------------
[nit] `-pedantic` instead


================
Comment at: flang/lib/Frontend/CompilerInvocation.cpp:535
+
+  // Set the standard
+  if (enableConformanceChecks()) {
----------------
[nit] Comment inconsistent with the code (no standard is set here)


================
Comment at: flang/test/Driver/std2018.f90:6-8
+! RUN: %flang_fc1 %s  2>&1 | FileCheck %s --allow-empty --check-prefix=WITHOUT
+! RUN: %flang_fc1 -std=f2018 %s  2>&1 | FileCheck %s --check-prefix=GIVEN
+! RUN: %flang_fc1 -pedantic %s  2>&1 | FileCheck %s --check-prefix=GIVEN
----------------
`flang-new -fc1` (akin to `clang- cc1`), runs `-fsyntax-only` when no other action flag is specified. `f18` will go straight into code-generation. As such, this test fails for `f18`. Adding `-fsyntax-only` should fix it. It will also make the test a bit more clearer.


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  https://reviews.llvm.org/D97119/new/

https://reviews.llvm.org/D97119