From b61bb5d635c09429e85b84268d83b878367e1f32 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <victor.zverovich@gmail.com>
Date: Thu, 24 Apr 2014 14:18:37 -0700
Subject: [PATCH] Don't use rvalue references when compiling with clang and an
 old libstdc++ as the latter doesn't provide std::move.

---
 format.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/format.h b/format.h
index 75dbf3fe..0524c423 100644
--- a/format.h
+++ b/format.h
@@ -52,6 +52,10 @@
 # define FMT_GCC_EXTENSION
 #endif
 
+#if defined(__GNUC_LIBSTD__) && defined (__GNUC_LIBSTD_MINOR__)
+# define FMT_GNUC_LIBSTD_VERSION (__GNUC_LIBSTD__ * 100 + __GNUC_LIBSTD_MINOR__)
+#endif
+
 // Compatibility with compilers other than clang.
 #ifdef __has_feature
 # define FMT_HAS_FEATURE(x) __has_feature(x)
@@ -74,6 +78,11 @@
 # define FMT_USE_RVALUE_REFERENCES \
    (FMT_HAS_FEATURE(cxx_rvalue_references) || \
        (FMT_GCC_VERSION >= 403 && __cplusplus >= 201103) || _MSC_VER >= 1600)
+// Don't use rvalue references when compiling with clang and an old libstdc++
+// as the latter doesn't provide std::move.
+# ifdef FMT_GNUC_LIBSTD_VERSION <= 402
+#  define FMT_USE_RVALUE_REFERENCES 0
+# endif
 #endif
 
 #if FMT_USE_RVALUE_REFERENCES