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-rw-r--r--absl/flags/config.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/absl/flags/config.h b/absl/flags/config.h
index fbe349611f54..001f8feaf637 100644
--- a/absl/flags/config.h
+++ b/absl/flags/config.h
@@ -56,4 +56,12 @@
 #define ABSL_FLAGS_INTERNAL_ATOMIC_DOUBLE_WORD 1
 #endif
 
+// ABSL_FLAGS_INTERNAL_HAS_RTTI macro is used for selecting if we can use RTTI
+// for flag type identification.
+#ifdef ABSL_FLAGS_INTERNAL_HAS_RTTI
+#error ABSL_FLAGS_INTERNAL_HAS_RTTI cannot be directly set
+#elif !defined(__GNUC__) || defined(__GXX_RTTI)
+#define ABSL_FLAGS_INTERNAL_HAS_RTTI 1
+#endif  // !defined(__GNUC__) || defined(__GXX_RTTI)
+
 #endif  // ABSL_FLAGS_CONFIG_H_