Merge pull request #108 from jupp0r/bugfix/fix-compile-error-with-gcc-7

jupp0r · web-flow · commit 85acdf77b34c · 2018-04-21T13:34:39.000-07:00
Fix GCC 7 compile error
diff --git a/include/prometheus/summary.h b/include/prometheus/summary.h
@@ -3,6 +3,7 @@
 #include <array>
 #include <atomic>
 #include <chrono>
+#include <functional>
 #include <list>
 #include <mutex>
 #include <vector>
