[flang][Driver] Support -Qunused-arguments

[tarunprabhu]

This partially addresses: #89888

[llvmbot]

@llvm/pr-subscribers-flang-driver

@llvm/pr-subscribers-clang

Author: Tarun Prabhu (tarunprabhu)

Changes

This partially addresses: #89888

---

Full diff: https://github.com/llvm/llvm-project/pull/107462.diff

2 Files Affected:

• (modified) clang/include/clang/Driver/Options.td (+1-1)
• (added) flang/test/Driver/q-unused-arguments.f90 (+5)

diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 1b9b3f2c6600a3..e3a98bab2a5020 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -949,7 +949,7 @@ def : Flag<["-"], "fident">, Group<f_Group>, Alias<Qy>,
 def : Flag<["-"], "fno-ident">, Group<f_Group>, Alias<Qn>,
   Visibility<[ClangOption, CLOption, DXCOption, CC1Option]>;
 def Qunused_arguments : Flag<["-"], "Qunused-arguments">,
-  Flags<[NoXarchOption]>, Visibility<[ClangOption, CLOption, DXCOption]>,
+  Flags<[NoXarchOption]>, Visibility<[ClangOption, CLOption, DXCOption, FlangOption]>,
   HelpText<"Don't emit warning for unused driver arguments">;
 def Q : Flag<["-"], "Q">, IgnoredGCCCompat;
 def S : Flag<["-"], "S">, Flags<[NoXarchOption]>,
diff --git a/flang/test/Driver/q-unused-arguments.f90 b/flang/test/Driver/q-unused-arguments.f90
new file mode 100644
index 00000000000000..95210da888fc55
--- /dev/null
+++ b/flang/test/Driver/q-unused-arguments.f90
@@ -0,0 +1,5 @@
+! RUN: %flang -Qunused-arguments -c -o /dev/null %s -L. 2>&1 | FileCheck %s --allow-empty
+
+! CHECK-NOT: argument unused during compilation
+
+end program

[kiranchandramohan]

LG.