commit 7d60232b38b66138dae1b31027d73ee5b9df5c58
author Krzysztof Parzyszek <Krzysztof.Parzyszek@amd.com> Wed Apr 10 10:41:20 2024 -0500
committer GitHub <noreply@github.com> Wed Apr 10 10:41:20 2024 -0500
tree 953c0ad6998b8ffb0764e92ea0908cb4125edd37
parent f1ee458ddb45c9887b3df583ce9a4ba12aae8b3b

[flang][Frontend] Implement printing defined macros via -dM (#87627)

This should work the same way as in clang.

clang/lib/Driver/ToolChains/Flang.cpp

diff --git a/clang/lib/Driver/ToolChains/Flang.cpp b/clang/lib/Driver/ToolChains/Flang.cpp
index 2c83f70..9699443 100644
--- a/clang/lib/Driver/ToolChains/Flang.cpp
+++ b/clang/lib/Driver/ToolChains/Flang.cpp
@@ -679,7 +679,10 @@
   CmdArgs.push_back(Args.MakeArgString(TripleStr));
 
   if (isa<PreprocessJobAction>(JA)) {
-      CmdArgs.push_back("-E");
+    CmdArgs.push_back("-E");
+    if (Args.getLastArg(options::OPT_dM)) {
+      CmdArgs.push_back("-dM");
+    }
   } else if (isa<CompileJobAction>(JA) || isa<BackendJobAction>(JA)) {
     if (JA.getType() == types::TY_Nothing) {
       CmdArgs.push_back("-fsyntax-only");