+--- a/libstdc++-v3/include/c_std/std_cstdio.h
++++ b/libstdc++-v3/include/c_std/std_cstdio.h
+@@ -144,7 +144,7 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
+
+ _GLIBCXX_END_NAMESPACE
+
+-#if _GLIBCXX_USE_C99
++#if _GLIBCXX_USE_C99 || defined(__UCLIBC__)
+
+ #undef snprintf
+ #undef vfscanf