diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2fb495dc6..f733f0485 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -231,7 +231,7 @@ IF (MASK_LONGDOUBLE)
 ENDIF()
 
 if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
-    MY_CHECK_AND_SET_COMPILER_FLAG("-Wno-deprecated-enum-enum-conversion -Wno-register")
+    MY_CHECK_AND_SET_COMPILER_FLAG("-Wno-deprecated-enum-enum-conversion -Wno-register -Wno-typedef-redefinition")
 elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
     MY_CHECK_AND_SET_COMPILER_FLAG("-Wno-register")
 endif()
diff --git a/dbcon/ddlpackage/CMakeLists.txt b/dbcon/ddlpackage/CMakeLists.txt
index 5557ed3ff..1c986eced 100644
--- a/dbcon/ddlpackage/CMakeLists.txt
+++ b/dbcon/ddlpackage/CMakeLists.txt
@@ -10,7 +10,7 @@ FLEX_TARGET(ddl_scan ddl.l ${CMAKE_CURRENT_BINARY_DIR}/ddl-scan.cpp COMPILE_FLAG
 ADD_FLEX_BISON_DEPENDENCY(ddl_scan ddl_gram)
 
 set_source_files_properties(ddl-scan.cpp PROPERTIES COMPILE_FLAGS "-Wno-register -Wno-deprecated-register -Wno-sign-compare -DYY_NO_INPUT")
-
+set_source_files_properties(ddl-gram.cpp PROPERTIES COMPILE_FLAGS "-Wno-unused-but-set-variable")
 ########### next target ###############
 
 include_directories(${CMAKE_CURRENT_BINARY_DIR}) # to pick up flex/bison output
diff --git a/dbcon/dmlpackage/CMakeLists.txt b/dbcon/dmlpackage/CMakeLists.txt
index e999cdae1..ccd0b0985 100644
--- a/dbcon/dmlpackage/CMakeLists.txt
+++ b/dbcon/dmlpackage/CMakeLists.txt
@@ -11,7 +11,7 @@ FLEX_TARGET(dml_scan dml.l ${CMAKE_CURRENT_BINARY_DIR}/dml-scan.cpp COMPILE_FLAG
 ADD_FLEX_BISON_DEPENDENCY(dml_scan dml_gram)
 
 set_source_files_properties(dml-scan.cpp PROPERTIES COMPILE_FLAGS "-Wno-register -Wno-deprecated-register -Wno-sign-compare -DYY_NO_INPUT")
-
+set_source_files_properties(dml-gram.cpp PROPERTIES COMPILE_FLAGS "-Wno-unused-but-set-variable")
 ########### next target ###############
 
 include_directories(${CMAKE_CURRENT_BINARY_DIR})  # to pick up flex/bison output
diff --git a/dbcon/joblist/tupleaggregatestep.cpp b/dbcon/joblist/tupleaggregatestep.cpp
index 03093c18c..89286f3e0 100644
--- a/dbcon/joblist/tupleaggregatestep.cpp
+++ b/dbcon/joblist/tupleaggregatestep.cpp
@@ -2051,7 +2051,6 @@ void TupleAggregateStep::prep1PhaseDistinctAggregate(JobInfo& jobInfo, vector<Ro
     // if so, replace the "-1" to actual position in returned vec.
     AGG_MAP aggDupFuncMap;
     projColsUDAFIdx = 0;
-    int64_t multiParms = 0;
 
     // copy over the groupby vector
     // update the outputColumnIndex if returned
@@ -2096,7 +2095,6 @@ void TupleAggregateStep::prep1PhaseDistinctAggregate(JobInfo& jobInfo, vector<Ro
         }
 
         // Skip on final agg.: Extra parms for an aggregate have no work there.
-        ++multiParms;
         continue;
       }
       else
@@ -4324,7 +4322,6 @@ void TupleAggregateStep::prep2PhasesDistinctAggregate(JobInfo& jobInfo, vector<R
     // Keep a count of the parms after the first for any aggregate.
     // These will be skipped and the count needs to be subtracted
     // from where the aux column will be.
-    int64_t multiParms = 0;
     projColsUDAFIdx = 0;
     // check if the count column for AVG is also a returned column,
     // if so, replace the "-1" to actual position in returned vec.
@@ -4372,7 +4369,6 @@ void TupleAggregateStep::prep2PhasesDistinctAggregate(JobInfo& jobInfo, vector<R
           aggDupFuncMap.erase(it);
         }
         // Skip further UM porocessing of the multi-parm: Extra parms for an aggregate have no work on the UM
-        ++multiParms;
         continue;
       }
       else
diff --git a/dbcon/mysql/ha_mcs_impl.cpp b/dbcon/mysql/ha_mcs_impl.cpp
index 53ffe0cb2..552ab7463 100644
--- a/dbcon/mysql/ha_mcs_impl.cpp
+++ b/dbcon/mysql/ha_mcs_impl.cpp
@@ -906,12 +906,10 @@ uint32_t doUpdateDelete(THD* thd, gp_walk_info& gwi, const std::vector<COND*>& c
     List_iterator_fast<Item> value_it(thd->lex->value_list);
     updateCP->queryType(CalpontSelectExecutionPlan::UPDATE);
     ci->stats.fQueryType = updateCP->queryType();
-    uint32_t cnt = 0;
     tr1::unordered_set<string> timeStampColumnNames;
 
     while ((item = (Item_field*)field_it++))
     {
-      cnt++;
 
       string tmpTableName = bestTableName(item);
 
diff --git a/primitives/blockcache/iomanager.cpp b/primitives/blockcache/iomanager.cpp
index b1b727797..6dbf31446 100644
--- a/primitives/blockcache/iomanager.cpp
+++ b/primitives/blockcache/iomanager.cpp
@@ -388,7 +388,6 @@ void* thr_popper(ioManager* arg)
   utils::setThreadName("thr_popper");
   ioManager* iom = arg;
   FileBufferMgr* fbm;
-  int totalRqst = 0;
   fileRequest* fr = 0;
   BRM::LBID_t lbid = 0;
   BRM::OID_t oid = 0;
@@ -748,7 +747,6 @@ void* thr_popper(ioManager* arg)
 
     longSeekOffset = (uint64_t)offset * (uint64_t)fileBlockSize;
     lldiv_t cmpOffFact = lldiv(longSeekOffset, (4LL * 1024LL * 1024LL));
-    totalRqst++;
 
     uint32_t readCount = 0;
     uint32_t bytesRead = 0;
diff --git a/primitives/linux-port/dictionary.cpp b/primitives/linux-port/dictionary.cpp
index 40cac5014..2e8c2ad67 100644
--- a/primitives/linux-port/dictionary.cpp
+++ b/primitives/linux-port/dictionary.cpp
@@ -79,7 +79,7 @@ void PrimitiveProcessor::p_TokenByScan(const TokenByScanRequestHeader* h, TokenB
   const uint8_t* niceBlock;  // block cast to a byte-indexed type
   const uint8_t* niceInput;  // h cast to a byte-indexed type
   const uint16_t* offsets;
-  int offsetIndex, argIndex, argsOffset;
+  int offsetIndex, argsOffset;
   bool cmpResult = false;
   int i;
   const char* sig;
@@ -122,7 +122,6 @@ void PrimitiveProcessor::p_TokenByScan(const TokenByScanRequestHeader* h, TokenB
     siglen = offsets[offsetIndex - 1] - offsets[offsetIndex];
     sig = reinterpret_cast<const char*>(&niceBlock[offsets[offsetIndex]]);
     argsOffset = sizeof(TokenByScanRequestHeader);
-    argIndex = 0;
     args = reinterpret_cast<const DataValue*>(&niceInput[argsOffset]);
 
     if (eqFilter)
@@ -161,7 +160,6 @@ void PrimitiveProcessor::p_TokenByScan(const TokenByScanRequestHeader* h, TokenB
           goto store;
 
         argsOffset += sizeof(uint16_t) + args->len;
-        argIndex++;
         args = (DataValue*)&niceInput[argsOffset];
 
         cmpResult = compare(cs, h->COP2, sig, siglen, args->data, args->len);
@@ -186,7 +184,6 @@ void PrimitiveProcessor::p_TokenByScan(const TokenByScanRequestHeader* h, TokenB
             goto store;
 
           argsOffset += sizeof(uint16_t) + args->len;
-          argIndex++;
           args = (DataValue*)&niceInput[argsOffset];
         }
 
diff --git a/storage-manager/src/unit_tests.cpp b/storage-manager/src/unit_tests.cpp
index dc37007a7..200bb7d54 100644
--- a/storage-manager/src/unit_tests.cpp
+++ b/storage-manager/src/unit_tests.cpp
@@ -344,11 +344,9 @@ void metadataJournalTest(std::size_t size, off_t offset)
   cmd->flen = std::strlen(filename);
   memcpy(&cmd->filename, filename, cmd->flen);
   data = (uint64_t*)&cmd->filename[cmd->flen];
-  int count = 0;
   for (uint64_t i = 0; i < (size / sizeof(uint64_t)); i++)
   {
     data[i] = i;
-    count++;
   }
   hdr->type = SM_MSG_START;
   hdr->payloadLen = sizeof(*cmd) + cmd->flen + cmd->count;
@@ -384,11 +382,9 @@ void metadataJournalTest_append(std::size_t size)
   cmd->flen = std::strlen(filename);
   memcpy(&cmd->filename, filename, cmd->flen);
   data = (uint64_t*)&cmd->filename[cmd->flen];
-  int count = 0;
   for (uint64_t i = 0; i < (size / sizeof(uint64_t)); i++)
   {
     data[i] = i;
-    count++;
   }
   hdr->type = SM_MSG_START;
   hdr->payloadLen = sizeof(*cmd) + cmd->flen + cmd->count;
diff --git a/utils/common/robin_hood.h b/utils/common/robin_hood.h
index 94a9ed488..8c4694345 100644
--- a/utils/common/robin_hood.h
+++ b/utils/common/robin_hood.h
@@ -193,13 +193,7 @@ static Counts& counts()
 #define ROBIN_HOOD_PRIVATE_DEFINITION_HAS_NATIVE_WCHART() 1
 #endif
 
-// workaround missing "is_trivially_copyable" in g++ < 5.0
-// See https://stackoverflow.com/a/31798726/48181
-#if defined(__GNUC__) && __GNUC__ < 5
-#define ROBIN_HOOD_IS_TRIVIALLY_COPYABLE(...) __has_trivial_copy(__VA_ARGS__)
-#else
 #define ROBIN_HOOD_IS_TRIVIALLY_COPYABLE(...) std::is_trivially_copyable<__VA_ARGS__>::value
-#endif
 
 // helpers for C++ versions, see https://gcc.gnu.org/onlinedocs/cpp/Standard-Predefined-Macros.html
 #define ROBIN_HOOD_PRIVATE_DEFINITION_CXX() __cplusplus
diff --git a/utils/dataconvert/dataconvert.cpp b/utils/dataconvert/dataconvert.cpp
index 5f3af5a2e..147417aaf 100644
--- a/utils/dataconvert/dataconvert.cpp
+++ b/utils/dataconvert/dataconvert.cpp
@@ -1131,7 +1131,7 @@ bool mysql_str_to_time(const string& input, Time& output, long decimals)
       output.minute = 59;
       output.second = 59;
       output.msecond = exp10(decimals) - 1;
-      output.is_neg = 1;
+      output.is_neg = -1;
     }
     // If neither of the above match then we return a 0 time
     else
diff --git a/utils/dataconvert/dataconvert.h b/utils/dataconvert/dataconvert.h
index 908961caa..e42514ce7 100644
--- a/utils/dataconvert/dataconvert.h
+++ b/utils/dataconvert/dataconvert.h
@@ -971,7 +971,7 @@ struct Time
   signed is_neg : 1;
 
   // NULL column value = 0xFFFFFFFFFFFFFFFE
-  Time() : msecond(-2), second(-1), minute(-1), hour(-1), day(-1), is_neg(0b1)
+  Time() : msecond(-2), second(-1), minute(-1), hour(-1), day(-1), is_neg(-1)
   {
   }
 
@@ -990,7 +990,7 @@ struct Time
    : msecond(msec), second(sec), minute(min), hour(h), day(d), is_neg(neg)
   {
     if (h < 0)
-      is_neg = 0b1;
+      is_neg = -1;
   }
 
   int64_t convertToMySQLint() const;
@@ -1003,7 +1003,7 @@ inline void Time::reset()
   second = -1;
   minute = -1;
   hour = -1;
-  is_neg = 0b1;
+  is_neg = -1;
   day = -1;
 }