One more revision to synchronized Strutil::print (AcademySoftwareFoun…

…dation#3828)

This is a continuation/fix for AcademySoftwareFoundation#3825

src/include/OpenImageIO/strutil.h

@@ -207,6 +207,27 @@ namespace sync {
 /// Output is fully thread-safe (the outputs are "atomic" to the file or
 /// stream), and if the stream is buffered, it is flushed after the output).
 
+#if FMT_VERSION >= 70000
+template<typename Str, typename... Args>
+inline void print (FILE *file, const Str& fmt, Args&&... args)
+{
+    sync_output (file, ::fmt::vformat(fmt, ::fmt::make_format_args(args...)));
+}
+
+template<typename Str, typename... Args>
+inline void print (const Str& fmt, Args&&... args)
+{
+    print(stdout, fmt, std::forward<Args>(args)...);
+}
+
+template<typename Str, typename... Args>
+inline void print (std::ostream &file, const Str& fmt, Args&&... args)
+{
+    sync_output (file, ::fmt::vformat(fmt, ::fmt::make_format_args(args...)));
+}
+
+#else
+
 template<typename... Args>
 inline void print (FILE *file, const char* fmt, Args&&... args)
 {
@@ -224,6 +245,7 @@ inline void print (std::ostream &file, const char* fmt, Args&&... args)
 {
     sync_output (file, ::fmt::format(fmt, std::forward<Args>(args)...));
 }
+#endif
 } // namespace sync