allow formatted messages

1 files changed, 9 insertions, 0 deletions

diff --git a/common/stderr_log.cpp b/common/stderr_log.cpp
index b3b1fea333..18ad9b3f10 100644
--- a/common/stderr_log.cpp
+++ b/common/stderr_log.cpp
@@ -8,6 +8,15 @@ void StderrLogBackend::record(EventSeverity severity, Event event, const std::st
     std::cerr << "[" << severity << "] " << event << ": " << msg << std::endl;
 }
 
+void StderrLogBackend::record(EventSeverity severity, Event event, const char* format, ...) {
+    std::cerr << "[" << severity << "] " << event << ": ";
+    va_list args;
+    va_start(args, format);
+    vfprintf(stderr, format, args);
+    va_end(args);
+    std::cerr << std::endl;
+}
+
 void StderrLogBackend::record(EventSeverity severity, Event event, int64_t code) {
     std::cerr << "[" << severity << "] " << event << ": (" << code << ")" << std::endl;
 }