include/encoding: fix compat version error message

The compatv parameter can not behave as expected.
Using std::to_string instead of a macro pound sign.
Signed-off-by: Xinying Song <songxinying@cloudin.cn>
(cherry picked from commit 74745ef43e585f47f528ea3ab78061dfd4707f46)

diff --git a/src/include/encoding.h b/src/include/encoding.h
index 4889626f9097925d9136dea50e69a51edd839af9..4dd5be629bf5c24c6f13c1c0a771cc9bc0fde924 100644 (file)
--- a/src/include/encoding.h
+++ b/src/include/encoding.h
@@ -1058,7 +1058,7 @@ decode(std::array<T, N>& v, bufferlist::iterator& p)
 #define ENCODE_FINISH(bl) ENCODE_FINISH_NEW_COMPAT(bl, 0)
 
 #define DECODE_ERR_OLDVERSION(func, v, compatv)                                        \
-  (std::string(func) + " no longer understand old encoding version " #v " < " #compatv)
+  (std::string(func) + " no longer understand old encoding version " #v " < " + std::to_string(compatv))
 
 #define DECODE_ERR_PAST(func) \
   (std::string(func) + " decode past end of struct encoding")