From ded661bf35b65db0be96491adbefbeed7cb8e3a3 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <victor.zverovich@gmail.com>
Date: Sun, 8 Nov 2026 07:23:41 -0800
Subject: [PATCH] Move FMT_USE_RTTI to ostream.h

Only ostream.h and std.h use it, and std.h includes ostream.h.
---
 include/fmt/format.h  | 11 -----------
 include/fmt/ostream.h | 11 +++++++++++
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/include/fmt/format.h b/include/fmt/format.h
index 77b8df4a..7a0d02f0 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -97,17 +97,6 @@
 #  define FMT_INLINE_VARIABLE
 #endif
 
-// Check if RTTI is disabled.
-#ifdef FMT_USE_RTTI
-// Use the provided definition.
-#elif defined(__GXX_RTTI) || FMT_HAS_FEATURE(cxx_rtti) || defined(_CPPRTTI) || \
-    defined(__INTEL_RTTI__) || defined(__RTTI)
-// __RTTI is for EDG compilers. _CPPRTTI is for MSVC.
-#  define FMT_USE_RTTI 1
-#else
-#  define FMT_USE_RTTI 0
-#endif
-
 // Visibility when compiled as a shared library/object.
 #if defined(FMT_LIB_EXPORT) || defined(FMT_SHARED)
 #  define FMT_SO_VISIBILITY(value) FMT_VISIBILITY(value)
diff --git a/include/fmt/ostream.h b/include/fmt/ostream.h
index bf1b14c1..30e6de7f 100644
--- a/include/fmt/ostream.h
+++ b/include/fmt/ostream.h
@@ -30,6 +30,17 @@
 #  define FMT_MSVC_STL_UPDATE 0
 #endif
 
+// Check if RTTI is disabled.
+#ifdef FMT_USE_RTTI
+// Use the provided definition.
+#elif defined(__GXX_RTTI) || FMT_HAS_FEATURE(cxx_rtti) || defined(_CPPRTTI) || \
+    defined(__INTEL_RTTI__) || defined(__RTTI)
+// __RTTI is for EDG compilers. _CPPRTTI is for MSVC.
+#  define FMT_USE_RTTI 1
+#else
+#  define FMT_USE_RTTI 0
+#endif
+
 FMT_BEGIN_NAMESPACE
 namespace detail {