diff --git a/include/fc/time.hpp b/include/fc/time.hpp
index f2e4024..c5ae58a 100644
--- a/include/fc/time.hpp
+++ b/include/fc/time.hpp
@@ -3,8 +3,10 @@
 #include <fc/string.hpp>
 #include <fc/optional.hpp>
 
-#pragma warning (push)
-#pragma warning (disable : 4244)
+#ifdef _MSC_VER
+  #pragma warning (push)
+  #pragma warning (disable : 4244)
+#endif //// _MSC_VER
 
 namespace fc {
   class microseconds { 
@@ -91,5 +93,6 @@ namespace fc {
   typedef fc::optional<time_point> otime_point;
 }
 
-#pragma warning (pop)
-
+#ifdef _MSC_VER
+  #pragma warning (pop)
+#endif /// #ifdef _MSC_VER
diff --git a/include/fc/uint128.hpp b/include/fc/uint128.hpp
index 0577e3c..aab14f2 100644
--- a/include/fc/uint128.hpp
+++ b/include/fc/uint128.hpp
@@ -2,8 +2,10 @@
 #include <stdint.h>
 #include <string>
 
-#pragma warning (push)
-#pragma warning (disable : 4244)
+#ifdef _MSC_VER
+  #pragma warning (push)
+  #pragma warning (disable : 4244)
+#endif //// _MSC_VER
 
 namespace fc 
 {
@@ -114,5 +116,6 @@ namespace std
     };
 }
 
-#pragma warning (pop)
-
+#ifdef _MSC_VER
+  #pragma warning (pop)
+#endif ///_MSC_VER
diff --git a/include/fc/utility.hpp b/include/fc/utility.hpp
index 0c6c77e..098d9d0 100644
--- a/include/fc/utility.hpp
+++ b/include/fc/utility.hpp
@@ -59,3 +59,7 @@ namespace fc {
     a = fc::move(b);
     b = fc::move(tmp);
   }
+
+#define LLCONST(constant)   static_cast<int64_t>(constant##ll)
+#define ULLCONST(constant)  static_cast<uint64_t>(constant##ull)
+