diff --git a/contracts/test_api/test_action.cpp b/contracts/test_api/test_action.cpp
index 22d3f59c5d20dd159b823d80ddebae662833b5d2..adc517453fa19994e9aa36a2e08c56583f531cb3 100644
--- a/contracts/test_api/test_action.cpp
+++ b/contracts/test_api/test_action.cpp
@@ -152,7 +152,7 @@ void test_action::test_cf_action() {
       publication_time();
       eosio_assert( false, "system_api should not be allowed" );
    } else if ( cfa.payload == 210 ) {
-      send_inline( "hello", 6 );
+      send_inline( (char*)"hello", 6 );
       eosio_assert( false, "transaction_api should not be allowed" );
    } else if ( cfa.payload == 211 ) {
       send_deferred( N(testapi), N(testapi), "hello", 6 );
diff --git a/contracts/test_api/test_datastream.cpp b/contracts/test_api/test_datastream.cpp
index 23fc769d2f861e55d6b67cbb4dd0a4945f646b00..3ad663ec48ac821c688a1b8494fe1ffeff70203c 100644
--- a/contracts/test_api/test_datastream.cpp
+++ b/contracts/test_api/test_datastream.cpp
@@ -74,13 +74,13 @@ void test_datastream::test_basic()
         int a[2];
         bool operator==(const StaticArray &o) const { return a[0] == o.a[0] && a[1] == o.a[1]; }
     };
-    testtype<StaticArray>::run({10,20}, "StaticArray");
+    testtype<StaticArray>::run({{10,20}}, "StaticArray");
 
     testtype<std::string>::run("hello", "string");
 
     testtype<std::vector<int> >::run({10,20,30}, "vector");
     testtype<std::vector<int> >::run({}, "empty vector");
-    testtype<std::array<int, 3> >::run({10,20,30}, "std::array<T,N>");
+    testtype<std::array<int, 3> >::run({{10,20,30}}, "std::array<T,N>");
     testtype<std::map<int, std::string> >::run({{1,"apple"}, {2,"cat"}, {3,"panda"}}, "map");
     testtype<std::tuple<int, std::string, double> >::run({1, "abc", 3.3333}, "tuple");
 }
diff --git a/contracts/test_api_db/test_db.cpp b/contracts/test_api_db/test_db.cpp
index c342c514c50a75dce853a5391397615e054543e6..d9ded6e233c9a8c7d0b2940f86937171fbe5aa95 100644
--- a/contracts/test_api_db/test_db.cpp
+++ b/contracts/test_api_db/test_db.cpp
@@ -536,6 +536,9 @@ void test_db::idx_double_nan_lookup_fail(uint64_t receiver, uint64_t, uint64_t)
    }
 }
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wcast-align"
+
 void test_db::misaligned_secondary_key256_tests(uint64_t /* receiver */, uint64_t, uint64_t) {
    auto key = eosio::key256::make_from_word_sequence<uint64_t>(0ULL, 0ULL, 0ULL, 42ULL);
    char* ptr = (char*)(&key);
@@ -545,3 +548,5 @@ void test_db::misaligned_secondary_key256_tests(uint64_t /* receiver */, uint64_
    // test that find_primary doesn't crash on unaligned data
    db_idx256_find_primary( N(testapi), N(testtable), N(testapi), (eosio::key256*)(ptr), 2, 0);
 }
+
+#pragma clang diagnostic pop
diff --git a/libraries/fc/src/io/json.cpp b/libraries/fc/src/io/json.cpp
index 57c6462aa0c87c515b6e8e2881e5dd31b1207589..1ef8c78624550f7c0d36205e1f474ff50151eefc 100644
--- a/libraries/fc/src/io/json.cpp
+++ b/libraries/fc/src/io/json.cpp
@@ -657,7 +657,7 @@ namespace fc
               return;
            }
          default:
-            FC_THROW_EXCEPTION( fc::invalid_arg_exception, "Unsupported variant type: " + v.get_type() );
+            FC_THROW_EXCEPTION( fc::invalid_arg_exception, "Unsupported variant type: " + std::to_string( v.get_type() ) );
       }
    }
 
diff --git a/programs/eosio-applesedemo/main.cpp b/programs/eosio-applesedemo/main.cpp
index ca0018c532db5a9c8a27d6b4f905c9b20b4326f5..f43d83c3805d866268a9c8018fbaaaa46680f6bb 100644
--- a/programs/eosio-applesedemo/main.cpp
+++ b/programs/eosio-applesedemo/main.cpp
@@ -34,7 +34,7 @@ CFDictionaryRef CopyOurKeyInfo() {
    CFDictionaryRef keyAttrDic = CFDictionaryCreate(nullptr, keyAttrKeys, keyAttrValues, sizeof(keyAttrKeys)/sizeof(keyAttrKeys[0]), &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
 
    CFDictionaryRef attributes = nullptr;
-   OSStatus ret = SecItemCopyMatching(keyAttrDic, (CFTypeRef*)&attributes);
+   SecItemCopyMatching(keyAttrDic, (CFTypeRef*)&attributes);
 
    CFRelease(keyAttrDic);
    return attributes;
@@ -296,4 +296,4 @@ int main(int argc, char* argv[]) {
       cout << all_desc << endl;
    
    return 0;
-}
\ No newline at end of file
+}