1 files changed, 11 insertions, 0 deletions
diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
index 846e5fc..17948dc 100644
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -605,6 +605,17 @@ static void InitializeStandardPredefinedMacros(const TargetInfo &TI,
       Builder.defineMacro("HIP_API_PER_THREAD_DEFAULT_STREAM");
     }
   }
+
+  if (LangOpts.OpenACC) {
+    // FIXME: When we have full support for OpenACC, we should set this to the
+    // version we support. Until then, set as '1' by default, but provide a
+    // temporary mechanism for users to override this so real-world examples can
+    // be tested against.
+    if (!LangOpts.OpenACCMacroOverride.empty())
+      Builder.defineMacro("_OPENACC", LangOpts.OpenACCMacroOverride);
+    else
+      Builder.defineMacro("_OPENACC", "1");
+  }
 }
 
 /// Initialize the predefined C++ language feature test macros defined in