Fixed #382.

Fixed warnings on gcc 4.1.2.
Added gcc version checking for adding -std=c++03 flag.

CMakeLists.txt

@@ -14,6 +14,8 @@ SET (prefix ${CMAKE_INSTALL_PREFIX})
 SET (exec_prefix "\${prefix}")
 SET (libdir "\${exec_prefix}/lib")
 SET (includedir "\${prefix}/include")
+SET (GNUCXX_STD_SUPPORT_VERSION "4.3")
+SET (GNUCXX_NO_MISMATCHED_TAGS_SUPPORT_VERSION "4.4")
 
 OPTION (MSGPACK_CXX11 "Using c++11 compiler" OFF)
 OPTION (MSGPACK_32BIT "32bit compile" OFF)
@@ -43,7 +45,10 @@ IF (MSGPACK_CXX11)
    ENDIF ()
 ELSE ()
    IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+      IF ((CMAKE_CXX_COMPILER_VERSION VERSION_GREATER ${GNUCXX_STD_SUPPORT_VERSION}) OR
+          (CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL   ${GNUCXX_STD_SUPPORT_VERSION}))
           SET (CMAKE_CXX_FLAGS "-std=c++03 ${CMAKE_CXX_FLAGS}")
+      ENDIF ()
    ELSEIF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
       SET (CMAKE_CXX_FLAGS "-std=c++03 ${CMAKE_CXX_FLAGS}")
    ELSEIF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
@@ -278,10 +283,22 @@ ENDIF ()
 
 IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
     IF (MSGPACK_ENABLE_SHARED)
-        SET_PROPERTY (TARGET msgpack APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Wno-mismatched-tags -Werror -g -O3 -DPIC")
+        SET_PROPERTY (TARGET msgpack APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -g -O3 -DPIC")
     ENDIF ()
-    SET_PROPERTY (TARGET msgpack-static APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Wno-mismatched-tags -Werror -g -O3" )
+    SET_PROPERTY (TARGET msgpack-static APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -g -O3" )
 ENDIF ()
+
+IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+    SET_PROPERTY (TARGET msgpack APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-mismatched-tags")
+ENDIF ()
+
+IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+    IF ((CMAKE_CXX_COMPILER_VERSION VERSION_GREATER ${GNUCXX_NO_MISMATCHED_TAGS_SUPPORT_VERSION}) OR
+        (CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL   ${GNUCXX_NO_MISMATCHED_TAGS_SUPPORT_VERSION}))
+    SET_PROPERTY (TARGET msgpack APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-mismatched-tags")
+    ENDIF ()
+ENDIF ()
+
 IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
     IF (CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
         STRING(REGEX REPLACE "/W[0-4]" "/W3 /WX" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")

example/boost/CMakeLists.txt

@@ -12,8 +12,20 @@ FOREACH (source_file ${exec_PROGRAMS})
         ${source_file}
     )
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -Wno-mismatched-tags -g -O3")
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -g -O3")
     ENDIF ()
+
+    IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-mismatched-tags")
+    ENDIF ()
+
+    IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+        IF ((CMAKE_CXX_COMPILER_VERSION VERSION_GREATER ${GNUCXX_NO_MISMATCHED_TAGS_SUPPORT_VERSION}) OR
+            (CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL   ${GNUCXX_NO_MISMATCHED_TAGS_SUPPORT_VERSION}))
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-mismatched-tags")
+        ENDIF ()
+    ENDIF ()
+
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
         IF (CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
             STRING(REGEX REPLACE "/W[0-4]" "/W3 /WX" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")

example/c/CMakeLists.txt

@@ -20,8 +20,20 @@ FOREACH (source_file ${exec_PROGRAMS})
         msgpack
     )
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -Wno-mismatched-tags -g -O3")
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -g -O3")
     ENDIF ()
+
+    IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-mismatched-tags")
+    ENDIF ()
+
+    IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+        IF ((CMAKE_CXX_COMPILER_VERSION VERSION_GREATER ${GNUCXX_NO_MISMATCHED_TAGS_SUPPORT_VERSION}) OR
+            (CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL   ${GNUCXX_NO_MISMATCHED_TAGS_SUPPORT_VERSION}))
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-mismatched-tags")
+        ENDIF ()
+    ENDIF ()
+
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
         IF (CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
             STRING(REGEX REPLACE "/W[0-4]" "/W3 /WX" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")

example/cpp03/CMakeLists.txt

@@ -33,7 +33,7 @@ FOREACH (source_file ${exec_PROGRAMS})
         ${source_file}
     )
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -Wno-mismatched-tags -g -O3")
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -g -O3")
     ENDIF ()
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
         IF (CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
@@ -54,7 +54,7 @@ FOREACH (source_file ${with_pthread_PROGRAMS})
         pthread
     )
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -Wno-mismatched-tags -g -O3 -pthread")
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -g -O3 -pthread")
     ENDIF ()
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
         IF (CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
@@ -86,9 +86,22 @@ FOREACH (source_file ${with_boost_lib_PROGRAMS})
             rt
         )
     ENDIF ()
+
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -Wno-mismatched-tags -g -O3")
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -O3")
     ENDIF ()
+
+    IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-mismatched-tags")
+    ENDIF ()
+
+    IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+        IF ((CMAKE_CXX_COMPILER_VERSION VERSION_GREATER ${GNUCXX_NO_MISMATCHED_TAGS_SUPPORT_VERSION}) OR
+            (CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL   ${GNUCXX_NO_MISMATCHED_TAGS_SUPPORT_VERSION}))
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-mismatched-tags")
+        ENDIF ()
+    ENDIF ()
+
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
         IF (CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
             STRING(REGEX REPLACE "/W[0-4]" "/W3 /WX" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")

example/cpp11/CMakeLists.txt

@@ -15,8 +15,20 @@ IF (MSGPACK_CXX11)
             ${source_file}
         )
         IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-            SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -Wno-mismatched-tags -g -O3")
+            SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -g -O3 ")
         ENDIF ()
+
+        IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+            SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-mismatched-tags")
+        ENDIF ()
+
+        IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+            IF ((CMAKE_CXX_COMPILER_VERSION VERSION_GREATER ${GNUCXX_NO_MISMATCHED_TAGS_SUPPORT_VERSION}) OR
+                (CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL   ${GNUCXX_NO_MISMATCHED_TAGS_SUPPORT_VERSION}))
+            SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-mismatched-tags")
+            ENDIF ()
+        ENDIF ()
+
         IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
             IF (CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
                 STRING(REGEX REPLACE "/W[0-4]" "/W3 /WX" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")

test/CMakeLists.txt

@@ -75,8 +75,19 @@ FOREACH (source_file ${check_PROGRAMS})
     )
     ADD_TEST (${source_file_we} ${source_file_we})
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -Wno-mismatched-tags -g -O3")
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -g -O3 ")
     ENDIF ()
+    IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-mismatched-tags")
+    ENDIF ()
+
+    IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+        IF ((CMAKE_CXX_COMPILER_VERSION VERSION_GREATER ${GNUCXX_NO_MISMATCHED_TAGS_SUPPORT_VERSION}) OR
+            (CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL   ${GNUCXX_NO_MISMATCHED_TAGS_SUPPORT_VERSION}))
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-mismatched-tags")
+        ENDIF ()
+    ENDIF ()
+
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
         IF (CMAKE_CXX_FLAGS MATCHES "/W[0-4] /WX")
             STRING(REGEX REPLACE "/W[0-4]" "/W3 /WX" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")

test/boost_variant.cpp

@@ -147,7 +147,7 @@ TEST(MSGPACK_BOOST, pack_convert_variant_positive_integer)
     std::stringstream ss;
     msgpack::type::variant val1 = 123;
     EXPECT_TRUE(val1.is_uint64_t());
-    EXPECT_EQ(val1.as_uint64_t(), 123);
+    EXPECT_EQ(val1.as_uint64_t(), 123U);
 
     msgpack::pack(ss, val1);
 
@@ -155,7 +155,7 @@ TEST(MSGPACK_BOOST, pack_convert_variant_positive_integer)
     msgpack::unpack(ret, ss.str().data(), ss.str().size());
     msgpack::type::variant val2 = ret.get().as<msgpack::type::variant>();
     EXPECT_TRUE(val2.is_uint64_t());
-    EXPECT_EQ(val2.as_uint64_t(), 123);
+    EXPECT_EQ(val2.as_uint64_t(), 123U);
     EXPECT_NO_THROW(boost::get<uint64_t>(val2));
     EXPECT_TRUE(val1 == val2);
 }
@@ -164,11 +164,11 @@ TEST(MSGPACK_BOOST, object_variant_positive_integer)
 {
     msgpack::type::variant val1 = 123;
     EXPECT_TRUE(val1.is_uint64_t());
-    EXPECT_EQ(val1.as_uint64_t(), 123);
+    EXPECT_EQ(val1.as_uint64_t(), 123U);
     msgpack::object obj(val1);
     msgpack::type::variant val2 = obj.as<msgpack::type::variant>();
     EXPECT_TRUE(val2.is_uint64_t());
-    EXPECT_EQ(val2.as_uint64_t(), 123);
+    EXPECT_EQ(val2.as_uint64_t(), 123U);
     EXPECT_NO_THROW(boost::get<uint64_t>(val2));
     EXPECT_TRUE(val1 == val2);
 }
@@ -178,11 +178,11 @@ TEST(MSGPACK_BOOST, object_with_zone_variant_positive_integer)
     msgpack::zone z;
     msgpack::type::variant val1 = 123;
     EXPECT_TRUE(val1.is_uint64_t());
-    EXPECT_EQ(val1.as_uint64_t(), 123);
+    EXPECT_EQ(val1.as_uint64_t(), 123U);
     msgpack::object obj(val1, z);
     msgpack::type::variant val2 = obj.as<msgpack::type::variant>();
     EXPECT_TRUE(val2.is_uint64_t());
-    EXPECT_EQ(val2.as_uint64_t(), 123);
+    EXPECT_EQ(val2.as_uint64_t(), 123U);
     EXPECT_NO_THROW(boost::get<uint64_t>(val2));
     EXPECT_TRUE(val1 == val2);
 }

test/msgpack_basic.cpp

@@ -408,7 +408,7 @@ TEST(MSGPACK, simple_buffer_fixext_1byte_255)
   msgpack::sbuffer sbuf;
   msgpack::packer<msgpack::sbuffer> packer(sbuf);
   char buf[size];
-  for (int i = 0; i != size; ++i) buf[i] = static_cast<char>(i);
+  for (std::size_t i = 0; i != size; ++i) buf[i] = static_cast<char>(i);
   packer.pack_ext(sizeof(buf), 77);
   packer.pack_ext_body(buf, sizeof(buf));
 
@@ -426,7 +426,7 @@ TEST(MSGPACK, simple_buffer_fixext_2byte_256)
   msgpack::sbuffer sbuf;
   msgpack::packer<msgpack::sbuffer> packer(sbuf);
   char buf[size];
-  for (int i = 0; i != size; ++i) buf[i] = static_cast<char>(i);
+  for (std::size_t i = 0; i != size; ++i) buf[i] = static_cast<char>(i);
   packer.pack_ext(sizeof(buf), 77);
   packer.pack_ext_body(buf, sizeof(buf));
 
@@ -444,7 +444,7 @@ TEST(MSGPACK, simple_buffer_fixext_2byte_65535)
   msgpack::sbuffer sbuf;
   msgpack::packer<msgpack::sbuffer> packer(sbuf);
   char buf[size];
-  for (int i = 0; i != size; ++i) buf[i] = static_cast<char>(i);
+  for (std::size_t i = 0; i != size; ++i) buf[i] = static_cast<char>(i);
   packer.pack_ext(sizeof(buf), 77);
   packer.pack_ext_body(buf, sizeof(buf));
 

test/msgpack_c.cpp

@@ -521,7 +521,7 @@ TEST(MSGPACKC, simple_buffer_fixext_1byte_255)
 {
   const size_t size = 255;
   char buf[size];
-  for (int i = 0; i != size; ++i) buf[i] = i;
+  for (size_t i = 0; i != size; ++i) buf[i] = i;
 
   msgpack_sbuffer sbuf;
   msgpack_sbuffer_init(&sbuf);
@@ -548,7 +548,7 @@ TEST(MSGPACKC, simple_buffer_fixext_2byte_256)
 {
   const size_t size = 256;
   char buf[size];
-  for (int i = 0; i != size; ++i) buf[i] = i;
+  for (size_t i = 0; i != size; ++i) buf[i] = i;
 
   msgpack_sbuffer sbuf;
   msgpack_sbuffer_init(&sbuf);
@@ -575,7 +575,7 @@ TEST(MSGPACKC, simple_buffer_fixext_2byte_65535)
 {
   const size_t size = 65535;
   char buf[size];
-  for (int i = 0; i != size; ++i) buf[i] = i;
+  for (size_t i = 0; i != size; ++i) buf[i] = i;
 
   msgpack_sbuffer sbuf;
   msgpack_sbuffer_init(&sbuf);
@@ -602,7 +602,7 @@ TEST(MSGPACKC, simple_buffer_fixext_4byte_65536)
 {
   const size_t size = 65536;
   char buf[size];
-  for (int i = 0; i != size; ++i) buf[i] = i;
+  for (size_t i = 0; i != size; ++i) buf[i] = i;
 
   msgpack_sbuffer sbuf;
   msgpack_sbuffer_init(&sbuf);

test/msgpack_container.cpp

@@ -146,7 +146,7 @@ TEST(MSGPACK_STL, simple_buffer_assoc_vector)
 
 TEST(MSGPACK_STL, simple_buffer_map)
 {
-    typedef map<int, int, test::less<int>, test::allocator<std::pair<int, int> > > type;
+    typedef map<int, int, test::less<int>, test::allocator<std::pair<const int, int> > > type;
     for (unsigned int k = 0; k < kLoop; k++) {
         type val1;
         for (unsigned int i = 0; i < kElements; i++)
@@ -228,7 +228,7 @@ TEST(MSGPACK_STL, simple_buffer_pair)
 
 TEST(MSGPACK_STL, simple_buffer_multimap)
 {
-    typedef multimap<int, int, test::less<int>, test::allocator<std::pair<int, int> > > type;
+    typedef multimap<int, int, test::less<int>, test::allocator<std::pair<const int, int> > > type;
     for (unsigned int k = 0; k < kLoop; k++) {
         type val1;
         for (unsigned int i = 0; i < kElements; i++) {
@@ -352,7 +352,7 @@ TEST(MSGPACK_TR1, simple_buffer_tr1_unordered_map)
 
 TEST(MSGPACK_TR1, simple_buffer_tr1_unordered_multimap)
 {
-    typedef tr1::unordered_multimap<int, int, test::tr1_hash<int>, test::equal_to<int>, test::allocator<std::pair<int, int> > > type;
+    typedef tr1::unordered_multimap<int, int, test::tr1_hash<int>, test::equal_to<int>, test::allocator<std::pair<const int, int> > > type;
     for (unsigned int k = 0; k < kLoop; k++) {
         type val1;
         for (unsigned int i = 0; i < kElements; i++) {

test/object.cpp

@@ -294,7 +294,7 @@ TEST(object, construct_enum)
 {
     msgpack::object obj(elem);
     EXPECT_EQ(msgpack::type::POSITIVE_INTEGER, obj.type);
-    EXPECT_EQ(elem, obj.via.u64);
+    EXPECT_EQ(static_cast<uint64_t>(elem), obj.via.u64);
 }
 
 #if !defined(MSGPACK_USE_CPP03)
@@ -312,7 +312,7 @@ TEST(object, construct_enum_outer)
 {
     msgpack::object obj(outer_enum::elem);
     EXPECT_EQ(msgpack::type::POSITIVE_INTEGER, obj.type);
-    EXPECT_EQ(elem, obj.via.u64);
+    EXPECT_EQ(static_cast<uint64_t>(elem), obj.via.u64);
 }
 
 #if !defined(MSGPACK_USE_CPP03)

test/object_with_zone.cpp

@@ -687,7 +687,7 @@ TEST(object_with_zone, construct_enum)
     msgpack::zone z;
     msgpack::object obj(elem, z);
     EXPECT_EQ(msgpack::type::POSITIVE_INTEGER, obj.type);
-    EXPECT_EQ(elem, obj.via.u64);
+    EXPECT_EQ(static_cast<uint64_t>(elem), obj.via.u64);
 }
 
 #if !defined(MSGPACK_USE_CPP03)
@@ -707,7 +707,7 @@ TEST(object_with_zone, construct_enum_outer)
     msgpack::zone z;
     msgpack::object obj(outer_enum::elem, z);
     EXPECT_EQ(msgpack::type::POSITIVE_INTEGER, obj.type);
-    EXPECT_EQ(elem, obj.via.u64);
+    EXPECT_EQ(static_cast<uint64_t>(elem), obj.via.u64);
 }
 
 // User defined inheriting classes