diff --git a/dbcon/dmlpackage/dml-scan.sh b/dbcon/dmlpackage/dml-scan.sh
index 33299e477..1daa312cf 100755
--- a/dbcon/dmlpackage/dml-scan.sh
+++ b/dbcon/dmlpackage/dml-scan.sh
@@ -5,10 +5,10 @@
    set +e; \
    if [ -f dml-scan.cpp ]; \
        then diff -abBq dml-scan-temp.cpp dml-scan.cpp >/dev/null 2>&1; \
-       if [ $$? -ne 0 ]; \
+       if [ $? -ne 0 ]; \
            then mv -f dml-scan-temp.cpp dml-scan.cpp; \
            else touch dml-scan.cpp; \
        fi; \
        else mv -f dml-scan-temp.cpp dml-scan.cpp; \
    fi
-   rm -f dml-scan-temp.cpp
\ No newline at end of file
+   rm -f dml-scan-temp.cpp
diff --git a/dbcon/execplan/arithmeticoperator.cpp b/dbcon/execplan/arithmeticoperator.cpp
index 71857a8fa..57b77381a 100644
--- a/dbcon/execplan/arithmeticoperator.cpp
+++ b/dbcon/execplan/arithmeticoperator.cpp
@@ -40,22 +40,6 @@ struct to_lower
     }
 };
 
-//Trim any leading/trailing ws
-const string lrtrim(const string& in)
-{
-    string::size_type p1;
-    p1 = in.find_first_not_of(" \t\n");
-
-    if (p1 == string::npos) p1 = 0;
-
-    string::size_type p2;
-    p2 = in.find_last_not_of(" \t\n");
-
-    if (p2 == string::npos) p2 = in.size() - 1;
-
-    return string(in, p1, (p2 - p1 + 1));
-}
-
 }
 
 namespace execplan
diff --git a/dbcon/execplan/logicoperator.cpp b/dbcon/execplan/logicoperator.cpp
index a5353e472..a466017da 100644
--- a/dbcon/execplan/logicoperator.cpp
+++ b/dbcon/execplan/logicoperator.cpp
@@ -40,22 +40,6 @@ struct to_lower
     }
 };
 
-//Trim any leading/trailing ws
-const string lrtrim(const string& in)
-{
-    string::size_type p1;
-    p1 = in.find_first_not_of(" \t\n");
-
-    if (p1 == string::npos) p1 = 0;
-
-    string::size_type p2;
-    p2 = in.find_last_not_of(" \t\n");
-
-    if (p2 == string::npos) p2 = in.size() - 1;
-
-    return string(in, p1, (p2 - p1 + 1));
-}
-
 }
 
 namespace execplan
diff --git a/dbcon/execplan/predicateoperator.cpp b/dbcon/execplan/predicateoperator.cpp
index 704ab3a63..b32de94c2 100644
--- a/dbcon/execplan/predicateoperator.cpp
+++ b/dbcon/execplan/predicateoperator.cpp
@@ -46,22 +46,6 @@ struct to_lower
     }
 };
 
-//Trim any leading/trailing ws
-const string lrtrim(const string& in)
-{
-    string::size_type p1;
-    p1 = in.find_first_not_of(" \t\n");
-
-    if (p1 == string::npos) p1 = 0;
-
-    string::size_type p2;
-    p2 = in.find_last_not_of(" \t\n");
-
-    if (p2 == string::npos) p2 = in.size() - 1;
-
-    return string(in, p1, (p2 - p1 + 1));
-}
-
 }
 
 namespace execplan
diff --git a/dbcon/execplan/treenode.h b/dbcon/execplan/treenode.h
index 9fea74984..9c4283042 100644
--- a/dbcon/execplan/treenode.h
+++ b/dbcon/execplan/treenode.h
@@ -1136,7 +1136,9 @@ inline int64_t TreeNode::getDatetimeIntVal()
         dataconvert::Time tt;
         int day = 0;
 
-        memcpy(&tt, &fResult.intVal, 8);
+        void *ttp = static_cast<void*>(&tt);
+        
+        memcpy(ttp, &fResult.intVal, 8);
 
         // Note, this should probably be current date +/- time
         if ((tt.hour > 23) && (!tt.is_neg))
@@ -1166,7 +1168,7 @@ inline int64_t TreeNode::getTimeIntVal()
     {
         dataconvert::DateTime dt;
 
-        memcpy(&dt, &fResult.intVal, 8);
+        memcpy((int64_t*)(&dt), &fResult.intVal, 8);
         dataconvert::Time tt(0, dt.hour, dt.minute, dt.second, dt.msecond, false);
         memcpy(&fResult.intVal, &tt, 8);
         return fResult.intVal;
diff --git a/dbcon/joblist/jlf_subquery.cpp b/dbcon/joblist/jlf_subquery.cpp
index 7f2544be8..56dba64d7 100644
--- a/dbcon/joblist/jlf_subquery.cpp
+++ b/dbcon/joblist/jlf_subquery.cpp
@@ -336,7 +336,8 @@ bool isNotInSubquery(JobStepVector& jsv)
     return notIn;
 }
 
-
+// This fcn is currently unused.  Will keep it in the code for now.
+#if 0
 void alterCsepInExistsFilter(CalpontSelectExecutionPlan* csep, JobInfo& jobInfo)
 {
     // This is for window function in IN/EXISTS sub-query.
@@ -364,7 +365,7 @@ void alterCsepInExistsFilter(CalpontSelectExecutionPlan* csep, JobInfo& jobInfo)
     if (wcs.size() > 1)
         retCols.insert(retCols.end(), wcs.begin() + 1, wcs.end());
 }
-
+#endif
 
 void doCorrelatedExists(const ExistsFilter* ef, JobInfo& jobInfo)
 {
diff --git a/dbcon/joblist/joblistfactory.cpp b/dbcon/joblist/joblistfactory.cpp
index 788cf5cc9..30e683988 100644
--- a/dbcon/joblist/joblistfactory.cpp
+++ b/dbcon/joblist/joblistfactory.cpp
@@ -94,68 +94,6 @@ namespace
 {
 using namespace joblist;
 
-//Find the next step downstream from *in. Assumes only the first such step is needed.
-const JobStepVector::iterator getNextStep(JobStepVector::iterator& in, JobStepVector& list)
-{
-    JobStepVector::iterator end = list.end();
-
-    for (unsigned i = 0; i < in->get()->outputAssociation().outSize(); ++i)
-    {
-        JobStepVector::iterator iter = list.begin();
-        AnyDataListSPtr outAdl = in->get()->outputAssociation().outAt(i);
-
-        while (iter != end)
-        {
-            if (iter != in)
-            {
-                AnyDataListSPtr inAdl;
-
-                for (unsigned j = 0; j < iter->get()->inputAssociation().outSize(); j++)
-                {
-                    inAdl = iter->get()->inputAssociation().outAt(j);
-
-                    if (inAdl.get() == outAdl.get())
-                        return iter;
-                }
-            }
-
-            ++iter;
-        }
-    }
-
-    return end;
-}
-
-
-bool checkCombinable(JobStep* jobStepPtr)
-{
-    if (typeid(*(jobStepPtr)) == typeid(pColScanStep))
-    {
-        return true;
-    }
-    else if (typeid(*(jobStepPtr)) == typeid(PseudoColStep))
-    {
-        return true;
-    }
-    else if (typeid(*(jobStepPtr)) == typeid(pColStep))
-    {
-        return true;
-    }
-    else if (typeid(*(jobStepPtr)) == typeid(pDictionaryStep))
-    {
-        return true;
-    }
-    else if (typeid(*(jobStepPtr)) == typeid(PassThruStep))
-    {
-        return true;
-    }
-    else if (typeid(*(jobStepPtr)) == typeid(FilterStep))
-    {
-        return true;
-    }
-
-    return false;
-}
 
 void projectSimpleColumn(const SimpleColumn* sc, JobStepVector& jsv, JobInfo& jobInfo)
 {
@@ -1447,54 +1385,6 @@ void changePcolStepToPcolScan(JobStepVector::iterator& it, JobStepVector::iterat
     }
 }
 
-uint32_t shouldSort(const JobStep* inJobStep, int colWidth)
-{
-    //only pColStep and pColScan have colType
-    const pColStep* inStep = dynamic_cast<const pColStep*>(inJobStep);
-
-    if (inStep && colWidth > inStep->colType().colWidth)
-    {
-        return 1;
-    }
-
-    const pColScanStep* inScan = dynamic_cast<const pColScanStep*>(inJobStep);
-
-    if (inScan && colWidth > inScan->colType().colWidth)
-    {
-        return 1;
-    }
-
-    return 0;
-}
-
-void convertPColStepInProjectToPassThru(JobStepVector& psv, JobInfo& jobInfo)
-{
-    for (JobStepVector::iterator iter = psv.begin(); iter != psv.end(); ++iter)
-    {
-        pColStep* colStep = dynamic_cast<pColStep*>(iter->get());
-
-        if (colStep != NULL)
-        {
-            JobStepAssociation ia = iter->get()->inputAssociation();
-            DataList_t* fifoDlp = ia.outAt(0).get()->dataList();
-
-            if (fifoDlp)
-            {
-                if (iter->get()->oid() >= 3000 && iter->get()->oid() == fifoDlp->OID())
-                {
-                    PassThruStep* pts = 0;
-                    pts = new PassThruStep(*colStep);
-                    pts->alias(colStep->alias());
-                    pts->view(colStep->view());
-                    pts->name(colStep->name());
-                    pts->tupleId(iter->get()->tupleId());
-                    iter->reset(pts);
-                }
-            }
-        }
-    }
-}
-
 // optimize filter order
 //   perform none string filters first because string filter joins the tokens.
 void optimizeFilterOrder(JobStepVector& qsv)
@@ -1819,7 +1709,7 @@ void makeVtableModeSteps(CalpontSelectExecutionPlan* csep, JobInfo& jobInfo,
             jobInfo.limitCount = (uint64_t) - 1;
         }
 
-        // support order by and limit in sub-query/union or 
+        // support order by and limit in sub-query/union or
         // GROUP BY handler processed outer query order
         else if (csep->orderByCols().size() > 0)
         {
diff --git a/dbcon/joblist/pdictionaryscan.cpp b/dbcon/joblist/pdictionaryscan.cpp
index 6c1b7cecd..b8545b728 100644
--- a/dbcon/joblist/pdictionaryscan.cpp
+++ b/dbcon/joblist/pdictionaryscan.cpp
@@ -483,7 +483,8 @@ void pDictionaryScan::sendAPrimitiveMessage(
 )
 {
     DictTokenByScanRequestHeader hdr;
-    memset(&hdr, 0, sizeof(hdr));
+    void *hdrp = static_cast<void*>(&hdr);
+    memset(hdrp, 0, sizeof(hdr));
 
     hdr.ism.Interleave    = pm;
     hdr.ism.Flags         = planFlagsToPrimFlags(fTraceFlags);
@@ -913,7 +914,8 @@ void pDictionaryScan::serializeEqualityFilter()
     uint32_t i;
     vector<string> empty;
 
-    memset(&ism, 0, sizeof(ISMPacketHeader));
+    void *ismp = static_cast<void*>(&ism);
+    memset(ismp, 0, sizeof(ISMPacketHeader));
     ism.Command  = DICT_CREATE_EQUALITY_FILTER;
     msg.load((uint8_t*) &ism, sizeof(ISMPacketHeader));
     msg << uniqueID;
@@ -954,7 +956,8 @@ void pDictionaryScan::destroyEqualityFilter()
     ByteStream msg;
     ISMPacketHeader ism;
 
-    memset(&ism, 0, sizeof(ISMPacketHeader));
+    void *ismp = static_cast<void*>(&ism);
+    memset(ismp, 0, sizeof(ISMPacketHeader));
     ism.Command  = DICT_DESTROY_EQUALITY_FILTER;
     msg.load((uint8_t*) &ism, sizeof(ISMPacketHeader));
     msg << uniqueID;
diff --git a/dbcon/joblist/windowfunctionstep.cpp b/dbcon/joblist/windowfunctionstep.cpp
index 823b2bd04..fe43faa77 100644
--- a/dbcon/joblist/windowfunctionstep.cpp
+++ b/dbcon/joblist/windowfunctionstep.cpp
@@ -81,21 +81,6 @@ using namespace joblist;
 namespace
 {
 
-string keyName(uint64_t i, uint32_t key, const joblist::JobInfo& jobInfo)
-{
-    string name = jobInfo.projectionCols[i]->alias();
-
-    if (name.empty())
-    {
-        name = jobInfo.keyInfo->tupleKeyToName[key];
-
-        if (jobInfo.keyInfo->tupleKeyVec[key].fId < 100)
-            name = "Expression/Function";
-    }
-
-    return name = "'" + name + "'";
-}
-
 
 uint64_t getColumnIndex(const SRCP& c, const map<uint64_t, uint64_t>& m, JobInfo& jobInfo)
 {
diff --git a/dbcon/mysql/ha_calpont_dml.cpp b/dbcon/mysql/ha_calpont_dml.cpp
index 66edb13fa..e5f82f62b 100644
--- a/dbcon/mysql/ha_calpont_dml.cpp
+++ b/dbcon/mysql/ha_calpont_dml.cpp
@@ -88,103 +88,6 @@ inline uint32_t tid2sid(const uint32_t tid)
 }
 
 //StopWatch timer;
-int buildBuffer(uchar* buf, string& buffer, int& columns, TABLE* table)
-{
-    char attribute_buffer[1024];
-    String attribute(attribute_buffer, sizeof(attribute_buffer),
-                     &my_charset_bin);
-
-    std::string cols = " (";
-    std::string vals = " values (";
-    columns = 0;
-
-    for (Field** field = table->field; *field; field++)
-    {
-        const char* ptr;
-        const char* end_ptr;
-
-        if ((*field)->is_null())
-            ptr = end_ptr = 0;
-        else
-        {
-            bitmap_set_bit(table->read_set, (*field)->field_index);
-            (*field)->val_str(&attribute, &attribute);
-            ptr = attribute.ptr();
-            end_ptr = attribute.length() + ptr;
-        }
-
-        if (columns > 0)
-        {
-            cols.append(",");
-            vals.append(",");
-        }
-
-        columns++;
-
-        cols.append((*field)->field_name.str);
-
-        if (ptr == end_ptr)
-        {
-            vals.append ("NULL");
-        }
-        else
-        {
-
-            if ( (*field)->type() == MYSQL_TYPE_VARCHAR ||
-                    /*FIXME: (*field)->type() == MYSQL_TYPE_VARBINARY || */
-                    (*field)->type() == MYSQL_TYPE_VAR_STRING ||
-                    (*field)->type() == MYSQL_TYPE_STRING ||
-                    (*field)->type() == MYSQL_TYPE_DATE ||
-                    (*field)->type() == MYSQL_TYPE_DATETIME ||
-                    (*field)->type() == MYSQL_TYPE_DATETIME2 ||
-                    (*field)->type() == MYSQL_TYPE_TIME )
-                vals.append("'");
-
-            while (ptr < end_ptr)
-            {
-
-                if (*ptr == '\r')
-                {
-                    ptr++;
-                }
-                else if (*ptr == '\n')
-                {
-                    ptr++;
-                }
-                else if (*ptr == '\'' )
-                {
-                    //@Bug 1820. Replace apostrophe with strange character to pass parser.
-                    vals += '\252';
-                    ptr++;
-                }
-                else
-                    vals += *ptr++;
-            }
-
-            if ( (*field)->type() == MYSQL_TYPE_VARCHAR ||
-                    /*FIXME: (*field)->type() == MYSQL_TYPE_VARBINARY || */
-                    (*field)->type() == MYSQL_TYPE_VAR_STRING ||
-                    (*field)->type() == MYSQL_TYPE_STRING ||
-                    (*field)->type() == MYSQL_TYPE_DATE ||
-                    (*field)->type() == MYSQL_TYPE_DATETIME ||
-                    (*field)->type() == MYSQL_TYPE_DATETIME2 ||
-                    (*field)->type() == MYSQL_TYPE_TIME )
-                vals.append("'");
-        }
-    }
-
-    if (columns)
-    {
-        cols.append(") ");
-        vals.append(") ");
-        buffer = "INSERT INTO ";
-        buffer.append(table->s->table_name.str);
-        buffer.append(cols);
-        buffer.append(vals);
-    }
-
-    return columns;
-}
 
 uint32_t buildValueList (TABLE* table, cal_connection_info& ci )
 {
diff --git a/dbcon/mysql/ha_calpont_execplan.cpp b/dbcon/mysql/ha_calpont_execplan.cpp
index e6acfadb9..cb31cc75a 100644
--- a/dbcon/mysql/ha_calpont_execplan.cpp
+++ b/dbcon/mysql/ha_calpont_execplan.cpp
@@ -4686,7 +4686,7 @@ ReturnedColumn* buildAggregateColumn(Item* item, gp_walk_info& gwi)
             }
         }
     }
-    catch (std::logic_error e)
+    catch (std::logic_error &e)
     {
         gwi.fatalParseError = true;
         gwi.parseErrorText = "error building Aggregate Function: ";
diff --git a/dbcon/mysql/ha_calpont_impl.cpp b/dbcon/mysql/ha_calpont_impl.cpp
index a2f4cfbe7..cc80f9898 100644
--- a/dbcon/mysql/ha_calpont_impl.cpp
+++ b/dbcon/mysql/ha_calpont_impl.cpp
@@ -2114,7 +2114,7 @@ int ha_calpont_impl_rnd_init(TABLE* table)
     //check whether the system is ready to process statement.
 #ifndef _MSC_VER
     static DBRM dbrm(true);
-    bool bSystemQueryReady = dbrm.getSystemQueryReady();
+    int bSystemQueryReady = dbrm.getSystemQueryReady();
 
     if (bSystemQueryReady == 0)
     {
@@ -4269,7 +4269,7 @@ int ha_calpont_impl_group_by_init(ha_calpont_group_by_handler* group_hand, TABLE
     //check whether the system is ready to process statement.
 #ifndef _MSC_VER
     static DBRM dbrm(true);
-    bool bSystemQueryReady = dbrm.getSystemQueryReady();
+    int bSystemQueryReady = dbrm.getSystemQueryReady();
 
     if (bSystemQueryReady == 0)
     {
diff --git a/dbcon/mysql/ha_calpont_partition.cpp b/dbcon/mysql/ha_calpont_partition.cpp
index 61063f2f6..7d2317661 100644
--- a/dbcon/mysql/ha_calpont_partition.cpp
+++ b/dbcon/mysql/ha_calpont_partition.cpp
@@ -239,21 +239,6 @@ struct PartitionInfo
 
 typedef map<LogicalPartition, PartitionInfo> PartitionMap;
 
-const string charcolToString(int64_t v)
-{
-    ostringstream oss;
-    char c;
-
-    for (int i = 0; i < 8; i++)
-    {
-        c = v & 0xff;
-        oss << c;
-        v >>= 8;
-    }
-
-    return oss.str();
-}
-
 const string format(int64_t v, CalpontSystemCatalog::ColType& ct)
 {
     ostringstream oss;
diff --git a/dbcon/mysql/is_columnstore_files.cpp b/dbcon/mysql/is_columnstore_files.cpp
index 2ce7b1996..9bca1de21 100644
--- a/dbcon/mysql/is_columnstore_files.cpp
+++ b/dbcon/mysql/is_columnstore_files.cpp
@@ -100,6 +100,7 @@ static int generate_result(BRM::OID_t oid, BRM::DBRM* emp, TABLE* table, THD* th
     messageqcpp::MessageQueueClient* msgQueueClient;
     oam::Oam oam_instance;
     int pmId = 0;
+    int rc;
 
     emp->getExtents(oid, entries, false, false, true);
 
@@ -121,7 +122,7 @@ static int generate_result(BRM::OID_t oid, BRM::DBRM* emp, TABLE* table, THD* th
         {
             oam_instance.getDbrootPmConfig(iter->dbRoot, pmId);
         }
-        catch (std::runtime_error)
+        catch (std::runtime_error&)
         {
             // MCOL-1116: If we are here a DBRoot is offline/missing
             iter++;
@@ -137,14 +138,16 @@ static int generate_result(BRM::OID_t oid, BRM::DBRM* emp, TABLE* table, THD* th
         DbRootName << "DBRoot" << iter->dbRoot;
         std::string DbRootPath = config->getConfig("SystemConfig", DbRootName.str());
         fileSize = compressedFileSize = 0;
-        snprintf(fullFileName, WriteEngine::FILE_NAME_SIZE, "%s/%s", DbRootPath.c_str(), oidDirName);
+        rc = snprintf(fullFileName, WriteEngine::FILE_NAME_SIZE, "%s/%s", DbRootPath.c_str(), oidDirName);
 
         std::ostringstream oss;
         oss << "pm" << pmId << "_WriteEngineServer";
         std::string client = oss.str();
         msgQueueClient = messageqcpp::MessageQueueClientPool::getInstance(oss.str());
 
-        if (!get_file_sizes(msgQueueClient, fullFileName, &fileSize, &compressedFileSize))
+        // snprintf output truncation check 
+        if (rc ==  WriteEngine::FILE_NAME_SIZE ||
+            !get_file_sizes(msgQueueClient, fullFileName, &fileSize, &compressedFileSize))
         {
             messageqcpp::MessageQueueClientPool::releaseInstance(msgQueueClient);
             delete emp;
diff --git a/ddlproc/ddlproc.cpp b/ddlproc/ddlproc.cpp
index 6f827f8fd..5cc663fc2 100644
--- a/ddlproc/ddlproc.cpp
+++ b/ddlproc/ddlproc.cpp
@@ -71,14 +71,15 @@ namespace
 {
 DistributedEngineComm* Dec;
 
-void setupCwd()
+int8_t setupCwd()
 {
     string workdir = startup::StartUp::tmpDir();
 
     if (workdir.length() == 0)
         workdir = ".";
 
-    (void)chdir(workdir.c_str());
+    int8_t rc = chdir(workdir.c_str());
+    return rc;
 }
 
 void added_a_pm(int)
@@ -103,7 +104,18 @@ int main(int argc, char* argv[])
     // This is unset due to the way we start it
     program_invocation_short_name = const_cast<char*>("DDLProc");
 
-    setupCwd();
+    if ( setupCwd() < 0 )
+    {
+        LoggingID logid(23, 0, 0);
+        logging::Message::Args args1;
+        logging::Message msg(9);
+        args1.add("DDLProc could not set working directory ");
+        msg.format( args1 );
+        logging::Logger logger(logid.fSubsysID);
+        logger.logMessage(LOG_TYPE_CRITICAL, msg, logid);
+        return 1;
+    }
+
 
     WriteEngine::WriteEngineWrapper::init( WriteEngine::SUBSYSTEM_ID_DDLPROC );
 #ifdef _MSC_VER
diff --git a/dmlproc/dmlproc.cpp b/dmlproc/dmlproc.cpp
index f7fedbf18..a3e6fa713 100644
--- a/dmlproc/dmlproc.cpp
+++ b/dmlproc/dmlproc.cpp
@@ -491,17 +491,19 @@ void rollbackAll(DBRM* dbrm)
     dbrm->setSystemReady(true);
 }
 
-void setupCwd()
+int8_t setupCwd()
 {
     string workdir = startup::StartUp::tmpDir();
 
     if (workdir.length() == 0)
         workdir = ".";
 
-    (void)chdir(workdir.c_str());
+    int8_t rc = chdir(workdir.c_str());
 
-    if (access(".", W_OK) != 0)
-        (void)chdir("/tmp");
+    if (rc < 0 || access(".", W_OK) != 0)
+        rc = chdir("/tmp");
+
+    return rc;
 }
 }	// Namewspace
 
@@ -520,7 +522,18 @@ int main(int argc, char* argv[])
 
     Config* cf = Config::makeConfig();
 
-    setupCwd();
+    if ( setupCwd() )
+    {
+        LoggingID logid(21, 0, 0);
+        logging::Message::Args args1;
+        logging::Message msg(1);
+        args1.add("DMLProc couldn't cwd.");
+        msg.format( args1 );
+        logging::Logger logger(logid.fSubsysID);
+        logger.logMessage(LOG_TYPE_CRITICAL, msg, logid);
+        return 1;
+    }
+
 
     WriteEngine::WriteEngineWrapper::init( WriteEngine::SUBSYSTEM_ID_DMLPROC );
 #ifdef _MSC_VER
@@ -609,9 +622,20 @@ int main(int argc, char* argv[])
     try
     {
         string port = cf->getConfig(DMLProc, "Port");
-	string cmd = "fuser -k " + port + "/tcp >/dev/null 2>&1";
+        string cmd = "fuser -k " + port + "/tcp >/dev/null 2>&1";
 
+    // Couldn't check the return code b/c
+    // fuser returns 1 for unused port.
+#if defined(__GNUC__) && __GNUC__ >= 5
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-result"
         (void)::system(cmd.c_str());
+#pragma GCC diagnostic pop
+#else
+        (void)::system(cmd.c_str());
+#endif
+  
+  
     }
     catch (...)
     {
diff --git a/exemgr/main.cpp b/exemgr/main.cpp
index 8c6d8b475..e972c40ad 100644
--- a/exemgr/main.cpp
+++ b/exemgr/main.cpp
@@ -1301,10 +1301,12 @@ void setupSignalHandlers()
 void setupCwd(joblist::ResourceManager* rm)
 {
     std::string workdir = rm->getScWorkingDir();
-    (void)chdir(workdir.c_str());
+    int8_t rc = chdir(workdir.c_str());
 
-    if (access(".", W_OK) != 0)
-        (void)chdir("/tmp");
+    if (rc < 0 || access(".", W_OK) != 0)
+        rc = chdir("/tmp");
+    
+    return (rc < 0) ? -5 : rc;
 }
 
 void startRssMon(size_t maxPct, int pauseSeconds)
@@ -1470,9 +1472,12 @@ int main(int argc, char* argv[])
             break;
 
         default:
+            errMsg = "Couldn't change working directory or unknown error";
             break;
     }
 
+    err = setupCwd(rm);
+
     if (err < 0)
     {
         oam::Oam oam;
@@ -1496,9 +1501,6 @@ int main(int argc, char* argv[])
         return 2;
     }
 
-
-    setupCwd(rm);
-
     cleanTempDir();
 
     logging::MsgMap msgMap;
diff --git a/oam/oamcpp/CMakeLists.txt b/oam/oamcpp/CMakeLists.txt
index 10f98a7cc..72d6cdae2 100644
--- a/oam/oamcpp/CMakeLists.txt
+++ b/oam/oamcpp/CMakeLists.txt
@@ -10,6 +10,8 @@ add_library(oamcpp SHARED ${oamcpp_LIB_SRCS})
 
 target_link_libraries(oamcpp )
 
+target_compile_options(oamcpp PRIVATE -Wno-unused-result)
+
 set_target_properties(oamcpp PROPERTIES VERSION 1.0.0 SOVERSION 1)
 
 install(TARGETS oamcpp DESTINATION ${ENGINE_LIBDIR} COMPONENT libs)
diff --git a/oam/oamcpp/liboamcpp.cpp b/oam/oamcpp/liboamcpp.cpp
index 805c7d5d0..927250cfc 100644
--- a/oam/oamcpp/liboamcpp.cpp
+++ b/oam/oamcpp/liboamcpp.cpp
@@ -154,12 +154,14 @@ Oam::Oam()
     char* p = getenv("USER");
 
     if (p && *p)
-	USER = p;
+	    USER = p;
 
     userDir = USER;
 
     if ( USER != "root")
-	userDir = "home/" + USER;
+    {
+	    userDir = "home/" + USER;
+    }
 
 	tmpdir = startup::StartUp::tmpDir();
 
@@ -2901,8 +2903,6 @@ oamModuleInfo_t Oam::getModuleInfo()
         // Get Server Type Install ID
 
         serverTypeInstall = atoi(sysConfig->getConfig("Installation", "ServerTypeInstall").c_str());
-
-        sysConfig;
     }
     catch (...) {}
 
@@ -8563,9 +8563,6 @@ std::string Oam::createEC2Volume(std::string size, std::string name)
 
     oldFile.close();
 
-    if ( volumeName == "unknown" )
-        return "failed";
-
     if ( volumeName == "unknown" )
         return "failed";
 
@@ -8601,7 +8598,7 @@ bool Oam::attachEC2Volume(std::string volumeName, std::string deviceName, std::s
             	writeLog("attachEC2Volume: Attach failed, call detach:" + volumeName + " " + instanceName + " " + deviceName, LOG_TYPE_ERROR );
 
 				detachEC2Volume(volumeName);
-			}	
+			}
 			else
 				return true;
 		}
@@ -10470,12 +10467,8 @@ void Oam::sendStatusUpdate(ByteStream obs, ByteStream::byte returnRequestType)
             if (ibs.length() > 0)
             {
                 ibs >> returnRequestType;
-
-                if ( returnRequestType == returnRequestType )
-                {
-                    processor.shutdown();
-                    return;
-                }
+                processor.shutdown();
+                return;
             }
             else
             {
diff --git a/oamapps/alarmmanager/CMakeLists.txt b/oamapps/alarmmanager/CMakeLists.txt
index 73c069153..a6b12ab75 100644
--- a/oamapps/alarmmanager/CMakeLists.txt
+++ b/oamapps/alarmmanager/CMakeLists.txt
@@ -8,6 +8,8 @@ set(alarmmanager_LIB_SRCS alarmmanager.cpp alarm.cpp)
 
 add_library(alarmmanager SHARED ${alarmmanager_LIB_SRCS})
 
+target_compile_options(alarmmanager PRIVATE -Wno-unused-result)
+
 set_target_properties(alarmmanager PROPERTIES VERSION 1.0.0 SOVERSION 1)
 
 install(TARGETS alarmmanager DESTINATION ${ENGINE_LIBDIR} COMPONENT libs)
diff --git a/oamapps/alarmmanager/alarmmanager.cpp b/oamapps/alarmmanager/alarmmanager.cpp
index 10ca418d1..f07130c7b 100644
--- a/oamapps/alarmmanager/alarmmanager.cpp
+++ b/oamapps/alarmmanager/alarmmanager.cpp
@@ -484,8 +484,7 @@ void ALARMManager::sendAlarmReport (const char* componentID, int alarmID, int st
     else
         processName = repProcessName;
 
-    int returnStatus = API_SUCCESS;           //default
-    ByteStream msg1;
+ByteStream msg1;
 
     // setup message
     msg1 << (ByteStream::byte) alarmID;
@@ -621,7 +620,7 @@ void ALARMManager::getActiveAlarm(AlarmList& alarmList) const
 *****************************************************************************************/
 void ALARMManager::getAlarm(std::string date, AlarmList& alarmList) const
 {
-	
+
     string alarmFile = startup::StartUp::tmpDir() + "/alarms";
 
     //make 1 alarm log file made up of archive and current alarm.log
diff --git a/oamapps/columnstoreSupport/CMakeLists.txt b/oamapps/columnstoreSupport/CMakeLists.txt
index 6b612c8d3..9274b936c 100644
--- a/oamapps/columnstoreSupport/CMakeLists.txt
+++ b/oamapps/columnstoreSupport/CMakeLists.txt
@@ -8,6 +8,8 @@ set(columnstoreSupport_SRCS columnstoreSupport.cpp)
 
 add_executable(columnstoreSupport ${columnstoreSupport_SRCS})
 
+target_compile_options(columnstoreSupport PRIVATE -Wno-unused-result)
+
 target_link_libraries(columnstoreSupport ${ENGINE_LDFLAGS} readline ncurses  ${MARIADB_CLIENT_LIBS} ${ENGINE_EXEC_LIBS})
 
 install(TARGETS columnstoreSupport DESTINATION ${ENGINE_BINDIR} COMPONENT platform)
diff --git a/oamapps/mcsadmin/CMakeLists.txt b/oamapps/mcsadmin/CMakeLists.txt
index 8181c2aec..1052d77f8 100644
--- a/oamapps/mcsadmin/CMakeLists.txt
+++ b/oamapps/mcsadmin/CMakeLists.txt
@@ -8,6 +8,8 @@ set(mcsadmin_SRCS mcsadmin.cpp)
 
 add_executable(mcsadmin ${mcsadmin_SRCS})
 
+target_compile_options(mcsadmin PRIVATE -Wno-unused-result)
+
 target_link_libraries(mcsadmin ${ENGINE_LDFLAGS} readline ncurses ${MARIADB_CLIENT_LIBS} ${ENGINE_EXEC_LIBS} ${ENGINE_WRITE_LIBS})
 
 install(TARGETS mcsadmin DESTINATION ${ENGINE_BINDIR} COMPONENT platform)
diff --git a/oamapps/mcsadmin/mcsadmin.cpp b/oamapps/mcsadmin/mcsadmin.cpp
index d07c67ffb..c0507aadd 100644
--- a/oamapps/mcsadmin/mcsadmin.cpp
+++ b/oamapps/mcsadmin/mcsadmin.cpp
@@ -3348,15 +3348,14 @@ int processCommand(string* arguments)
 
             for (i = alarmList.begin(); i != alarmList.end(); ++i)
             {
-                switch (i->second.getState())
+                // SET = 1, CLEAR = 0
+                if (i->second.getState() == true)
                 {
-                    case SET:
-                        cout << "SET" << endl;
-                        break;
-
-                    case CLEAR:
-                        cout << "CLEAR" << endl;
-                        break;
+                    cout << "SET" << endl;
+                }
+                else
+                {
+                    cout << "CLEAR" << endl;
                 }
 
                 cout << "AlarmID           = " << i->second.getAlarmID() << endl;
@@ -5904,7 +5903,6 @@ int processCommand(string* arguments)
 
             int moduleID = 1;
             inputNames::const_iterator listPT1 = inputnames.begin();
-            umStorageNames::const_iterator listPT2 = umstoragenames.begin();
 
             for ( int i = 0 ; i < moduleCount ; i++ )
             {
diff --git a/oamapps/postConfigure/CMakeLists.txt b/oamapps/postConfigure/CMakeLists.txt
index 4bdbadd1a..fc6ded9b3 100644
--- a/oamapps/postConfigure/CMakeLists.txt
+++ b/oamapps/postConfigure/CMakeLists.txt
@@ -8,6 +8,8 @@ set(postConfigure_SRCS postConfigure.cpp helpers.cpp)
 
 add_executable(postConfigure ${postConfigure_SRCS})
 
+target_compile_options(postConfigure PRIVATE -Wno-unused-result)
+
 target_link_libraries(postConfigure ${ENGINE_LDFLAGS} readline ncurses ${MARIADB_CLIENT_LIBS} ${ENGINE_EXEC_LIBS})
 
 install(TARGETS postConfigure DESTINATION ${ENGINE_BINDIR} COMPONENT platform)
@@ -19,6 +21,8 @@ set(installer_SRCS installer.cpp helpers.cpp)
 
 add_executable(installer ${installer_SRCS})
 
+target_compile_options(installer PRIVATE -Wno-unused-result)
+
 target_link_libraries(installer ${ENGINE_LDFLAGS} readline ncurses ${MARIADB_CLIENT_LIBS} ${ENGINE_EXEC_LIBS})
 
 install(TARGETS installer DESTINATION ${ENGINE_BINDIR} COMPONENT platform)
@@ -52,6 +56,8 @@ set(mycnfUpgrade_SRCS mycnfUpgrade.cpp)
 
 add_executable(mycnfUpgrade ${mycnfUpgrade_SRCS})
 
+target_compile_options(mycnfUpgrade PRIVATE -Wno-unused-result)
+
 target_link_libraries(mycnfUpgrade ${ENGINE_LDFLAGS} readline ncurses ${MARIADB_CLIENT_LIBS} ${ENGINE_EXEC_LIBS})
 
 install(TARGETS mycnfUpgrade DESTINATION ${ENGINE_BINDIR} COMPONENT platform)
diff --git a/oamapps/postConfigure/postConfigure.cpp b/oamapps/postConfigure/postConfigure.cpp
index ad7d27d7a..eee8e0edf 100644
--- a/oamapps/postConfigure/postConfigure.cpp
+++ b/oamapps/postConfigure/postConfigure.cpp
@@ -273,9 +273,7 @@ int main(int argc, char* argv[])
 
     //check if root-user
     int user;
-    int usergroup;
     user = getuid();
-    usergroup = getgid();
 
 	string SUDO = "";
     if (user != 0)
@@ -1413,7 +1411,7 @@ int main(int argc, char* argv[])
 	{
 		string amazonLog = tmpDir + "/amazon.log";
 		string cmd = "aws --version > " + amazonLog + " 2>&1";
-		int rtnCode = system(cmd.c_str());
+		system(cmd.c_str());
 
 		ifstream in(amazonLog.c_str());
 
@@ -1974,7 +1972,7 @@ int main(int argc, char* argv[])
         }
     }
 
-    unsigned int maxPMNicCount = 1;
+    int maxPMNicCount = 1;
 
     //configure module type
     bool parentOAMmoduleConfig = false;
@@ -2111,7 +2109,7 @@ int main(int argc, char* argv[])
         //clear any Equipped Module IP addresses that aren't in current ID range
         for ( int j = 0 ; j < listSize ; j++ )
         {
-			for ( unsigned int k = 1 ; k < MaxNicID+1 ; k++)
+			for ( int k = 1 ; k < MaxNicID+1 ; k++)
             {
                 string ModuleIPAddr = "ModuleIPAddr" + oam.itoa(j + 1) + "-" + oam.itoa(k) + "-" + oam.itoa(i + 1);
 
@@ -2185,8 +2183,7 @@ int main(int argc, char* argv[])
 						}
 					}
 				}
-
-				unsigned int nicID=1;
+				int nicID=1;
 				for(  ; nicID < MaxNicID +1 ; nicID++ )
 				{
 					if ( !found )
@@ -3547,7 +3544,7 @@ int main(int argc, char* argv[])
 
         for ( int pmsID = 1; pmsID < pmPorts + 1 ; )
         {
-            for (unsigned int j = 1 ; j < maxPMNicCount + 1 ; j++)
+            for (int j = 1 ; j < maxPMNicCount + 1 ; j++)
             {
                 PerformanceModuleList::iterator list1 = performancemodulelist.begin();
 
@@ -4008,9 +4005,11 @@ int main(int argc, char* argv[])
                     break;
                 }
 
-                if ( pass1 == "exit")
+                if ( strncmp(pass1, "exit", 4) )
+                {
                     exit(0);
-
+                }
+                
                 string p1 = pass1;
                 pass2 = getpass("Confirm password > ");
                 string p2 = pass2;
@@ -6418,7 +6417,6 @@ bool glusterSetup(string password, bool doNotResolveHostNames)
     Oam oam;
     int dataRedundancyCopies = 0;
     int dataRedundancyNetwork = 0;
-    int dataRedundancyStorage = 0;
     int numberDBRootsPerPM = DBRootCount / pmNumber;
     int numberBricksPM = 0;
     std::vector<int> dbrootPms[DBRootCount];
diff --git a/oamapps/serverMonitor/CMakeLists.txt b/oamapps/serverMonitor/CMakeLists.txt
index 91d13bbd0..59fbad662 100644
--- a/oamapps/serverMonitor/CMakeLists.txt
+++ b/oamapps/serverMonitor/CMakeLists.txt
@@ -18,6 +18,8 @@ set(ServerMonitor_SRCS
 
 add_executable(ServerMonitor ${ServerMonitor_SRCS})
 
+target_compile_options(ServerMonitor PRIVATE -Wno-unused-result)
+
 target_link_libraries(ServerMonitor ${ENGINE_LDFLAGS} ${MARIADB_CLIENT_LIBS} ${ENGINE_EXEC_LIBS})
 
 install(TARGETS ServerMonitor DESTINATION ${ENGINE_BINDIR} COMPONENT platform)
diff --git a/oamapps/serverMonitor/cpuMonitor.cpp b/oamapps/serverMonitor/cpuMonitor.cpp
index c9d458a4f..1f1d6b3b3 100644
--- a/oamapps/serverMonitor/cpuMonitor.cpp
+++ b/oamapps/serverMonitor/cpuMonitor.cpp
@@ -569,7 +569,8 @@ void ServerMonitor::getCPUdata()
     while (oldFile.getline(line, 400))
     {
         string buf = line;
-        string::size_type pos = buf.find ('id,', 0);
+        // Questionable replacement
+        string::size_type pos = buf.find("id,", 0);
         if (pos == string::npos)
         {
             systemIdle = systemIdle + atol(buf.substr(0, pos - 1).c_str());
diff --git a/oamapps/serverMonitor/msgProcessor.cpp b/oamapps/serverMonitor/msgProcessor.cpp
index 48bfaa2f0..1c7b928ee 100644
--- a/oamapps/serverMonitor/msgProcessor.cpp
+++ b/oamapps/serverMonitor/msgProcessor.cpp
@@ -100,8 +100,8 @@ void msgProcessor()
         Config* sysConfig = Config::makeConfig();
         string port = sysConfig->getConfig(msgPort, "Port");
         string cmd = "fuser -k " + port + "/tcp >/dev/null 2>&1";
-        int user;
-        user = getuid();
+        //int user;
+        //user = getuid();
 
         system(cmd.c_str());
     }
diff --git a/primitives/blockcache/filebuffer.cpp b/primitives/blockcache/filebuffer.cpp
index 5ac6ee466..aa598c008 100644
--- a/primitives/blockcache/filebuffer.cpp
+++ b/primitives/blockcache/filebuffer.cpp
@@ -40,7 +40,10 @@ FileBuffer::FileBuffer() : fDataLen(0), fLbid(-1), fVerid(0)
 FileBuffer::FileBuffer(const FileBuffer& rhs)
 {
 
-    if (this == NULL || this == &rhs)
+    // Removed the check for gcc 8.2. The latest gcc version we 
+    // use ATM is 4.8.2 for centos 6 and it also doesn't need
+    // the check
+    if (this == &rhs)
         return;
 
     fLbid = rhs.fLbid;
diff --git a/primitives/blockcache/iomanager.cpp b/primitives/blockcache/iomanager.cpp
index 8e5e063cd..2bf4526e5 100644
--- a/primitives/blockcache/iomanager.cpp
+++ b/primitives/blockcache/iomanager.cpp
@@ -283,71 +283,6 @@ FdCacheType_t fdcache;
 boost::mutex fdMapMutex;
 rwlock::RWLock_local localLock;
 
-void pause_(unsigned secs)
-{
-    struct timespec req;
-    struct timespec rem;
-
-    req.tv_sec = secs;
-    req.tv_nsec = 0;
-
-    rem.tv_sec = 0;
-    rem.tv_nsec = 0;
-
-#ifdef _MSC_VER
-    Sleep(req.tv_sec * 1000);
-#else
-again:
-
-    if (nanosleep(&req, &rem) != 0)
-        if (rem.tv_sec > 0 || rem.tv_nsec > 0)
-        {
-            req = rem;
-            goto again;
-        }
-
-#endif
-}
-
-const vector<pair<string, string> > getDBRootList()
-{
-    vector<pair<string, string> > ret;
-    Config* config;
-    uint32_t dbrootCount, i;
-    string stmp, devname, mountpoint;
-    char devkey[80], mountkey[80];
-
-    config = Config::makeConfig();
-
-    stmp = config->getConfig("SystemConfig", "DBRootCount");
-
-    if (stmp.empty())
-    {
-        Message::Args args;
-        args.add("getDBRootList: Configuration error. No DBRootCount");
-        primitiveprocessor::mlp->logMessage(logging::M0006, args, true);
-        throw runtime_error("getDBRootList: Configuration error. No DBRootCount");
-    }
-
-    dbrootCount = config->uFromText(stmp);
-
-    for (i = 1; i <= dbrootCount; i++)
-    {
-        snprintf(mountkey, 80, "DBRoot%d", i);
-        snprintf(devkey, 80, "DBRootStorageLoc%d", i);
-        mountpoint = config->getConfig("SystemConfig", string(mountkey));
-        devname = config->getConfig("Installation", string(devkey));
-
-        if (mountpoint == "" || devname == "")
-            throw runtime_error("getDBRootList: Configuration error. Don't know where DBRoots are mounted");
-
-        ret.push_back(pair<string, string>(devname, mountpoint));
-// 		cout << "I see " << devname << " should be mounted at " << mountpoint << endl;
-    }
-
-    return ret;
-}
-
 char* alignTo(const char* in, int av)
 {
     ptrdiff_t inx = reinterpret_cast<ptrdiff_t>(in);
@@ -769,7 +704,7 @@ void* thr_popper(ioManager* arg)
             int opts = primitiveprocessor::directIOFlag ? IDBDataFile::USE_ODIRECT : 0;
             fp = NULL;
             uint32_t openRetries = 0;
-            int saveErrno;
+            int saveErrno = 0;
 
             while (fp == NULL && openRetries++ < 5)
             {
diff --git a/primitives/linux-port/column.cpp b/primitives/linux-port/column.cpp
index 8832a6448..afa411f08 100644
--- a/primitives/linux-port/column.cpp
+++ b/primitives/linux-port/column.cpp
@@ -1425,7 +1425,8 @@ namespace primitives
 void PrimitiveProcessor::p_Col(NewColRequestHeader* in, NewColResultHeader* out,
                                unsigned outSize, unsigned* written)
 {
-    memcpy(out, in, sizeof(ISMPacketHeader) + sizeof(PrimitiveHeader));
+    void *outp = static_cast<void*>(out);
+    memcpy(outp, in, sizeof(ISMPacketHeader) + sizeof(PrimitiveHeader));
     out->NVALS = 0;
     out->LBID = in->LBID;
     out->ism.Command = COL_RESULTS;
diff --git a/primitives/linux-port/dictionary.cpp b/primitives/linux-port/dictionary.cpp
index 2860ab571..e5a334436 100644
--- a/primitives/linux-port/dictionary.cpp
+++ b/primitives/linux-port/dictionary.cpp
@@ -127,7 +127,11 @@ void PrimitiveProcessor::p_TokenByScan(const TokenByScanRequestHeader* h,
 
     retTokens = reinterpret_cast<PrimToken*>(&niceRet[rdvOffset]);
     retDataValues = reinterpret_cast<DataValue*>(&niceRet[rdvOffset]);
-    memcpy(ret, h, sizeof(PrimitiveHeader) + sizeof(ISMPacketHeader));
+    
+    {
+        void *retp = static_cast<void*>(ret); 
+        memcpy(retp, h, sizeof(PrimitiveHeader) + sizeof(ISMPacketHeader));
+    }
     ret->NVALS = 0;
     ret->NBYTES = sizeof(TokenByScanResultHeader);
     ret->ism.Command = DICT_SCAN_COMPARE_RESULTS;
@@ -575,7 +579,10 @@ void PrimitiveProcessor::p_AggregateSignature(const AggregateSignatureRequestHea
     DataValue* min;
     DataValue* max;
 
-    memcpy(out, in, sizeof(ISMPacketHeader) + sizeof(PrimitiveHeader));
+    {
+        void *outp = static_cast<void*>(out);
+        memcpy(outp, in, sizeof(ISMPacketHeader) + sizeof(PrimitiveHeader));
+    }
     out->ism.Command = DICT_AGGREGATE_RESULTS;
     niceOutput = reinterpret_cast<uint8_t*>(out);
 
@@ -824,7 +831,10 @@ void PrimitiveProcessor::p_Dictionary(const DictInput* in, vector<uint8_t>* out,
 
     in8 = reinterpret_cast<const uint8_t*>(in);
 
-    memcpy(&header, in, sizeof(ISMPacketHeader) + sizeof(PrimitiveHeader));
+    {
+        void *hp = static_cast<void*>(&header);
+        memcpy(hp, in, sizeof(ISMPacketHeader) + sizeof(PrimitiveHeader));
+    }
     header.ism.Command = DICT_RESULTS;
     header.NVALS = 0;
     header.LBID = in->LBID;
diff --git a/primitives/primproc/batchprimitiveprocessor.cpp b/primitives/primproc/batchprimitiveprocessor.cpp
index 752c94d9e..bf34e9cb4 100644
--- a/primitives/primproc/batchprimitiveprocessor.cpp
+++ b/primitives/primproc/batchprimitiveprocessor.cpp
@@ -1774,8 +1774,10 @@ void BatchPrimitiveProcessor::writeErrorMsg(const string& error, uint16_t errCod
 
     // we don't need every field of these headers.  Init'ing them anyway
     // makes memory checkers happy.
-    memset(&ism, 0, sizeof(ISMPacketHeader));
-    memset(&ph, 0, sizeof(PrimitiveHeader));
+    void *ismp = static_cast<void*>(&ism);
+    void *php = static_cast<void*>(&ph);
+    memset(ismp, 0, sizeof(ISMPacketHeader));
+    memset(php, 0, sizeof(PrimitiveHeader));
     ph.SessionID = sessionID;
     ph.StepID = stepID;
     ph.UniqueID = uniqueID;
@@ -1800,8 +1802,10 @@ void BatchPrimitiveProcessor::writeProjectionPreamble()
 
     // we don't need every field of these headers.  Init'ing them anyway
     // makes memory checkers happy.
-    memset(&ism, 0, sizeof(ISMPacketHeader));
-    memset(&ph, 0, sizeof(PrimitiveHeader));
+    void *ismp = static_cast<void*>(&ism);
+    void *php = static_cast<void*>(&ph);
+    memset(ismp, 0, sizeof(ISMPacketHeader));
+    memset(php, 0, sizeof(PrimitiveHeader));
     ph.SessionID = sessionID;
     ph.StepID = stepID;
     ph.UniqueID = uniqueID;
@@ -1899,8 +1903,10 @@ void BatchPrimitiveProcessor::makeResponse()
 
     // we don't need every field of these headers.  Init'ing them anyway
     // makes memory checkers happy.
-    memset(&ism, 0, sizeof(ISMPacketHeader));
-    memset(&ph, 0, sizeof(PrimitiveHeader));
+    void *ismp = static_cast<void*>(&ism);
+    void *php = static_cast<void*>(&ph);
+    memset(ismp, 0, sizeof(ISMPacketHeader));
+    memset(php, 0, sizeof(PrimitiveHeader));
     ph.SessionID = sessionID;
     ph.StepID = stepID;
     ph.UniqueID = uniqueID;
diff --git a/primitives/primproc/columncommand.cpp b/primitives/primproc/columncommand.cpp
index ed4b26a44..f5db52a2d 100644
--- a/primitives/primproc/columncommand.cpp
+++ b/primitives/primproc/columncommand.cpp
@@ -51,17 +51,6 @@ using namespace logging;
 #define llabs labs
 #endif
 
-namespace
-{
-using namespace primitiveprocessor;
-
-double cotangent(double in)
-{
-    return (1.0 / tan(in));
-}
-
-}
-
 namespace primitiveprocessor
 {
 
diff --git a/primitives/primproc/primitiveserver.cpp b/primitives/primproc/primitiveserver.cpp
index 9359556e9..54f4b7fb6 100644
--- a/primitives/primproc/primitiveserver.cpp
+++ b/primitives/primproc/primitiveserver.cpp
@@ -1097,33 +1097,6 @@ namespace
 {
 using namespace primitiveprocessor;
 
-void pause_(unsigned delay)
-{
-    struct timespec req;
-    struct timespec rem;
-
-    req.tv_sec = delay;
-    req.tv_nsec = 0;
-
-    rem.tv_sec = 0;
-    rem.tv_nsec = 0;
-#ifdef _MSC_VER
-    Sleep(req.tv_sec * 1000);
-#else
-again:
-
-    if (nanosleep(&req, &rem) != 0)
-    {
-        if (rem.tv_sec > 0 || rem.tv_nsec > 0)
-        {
-            req = rem;
-            goto again;
-        }
-    }
-
-#endif
-}
-
 /** @brief The job type to process a dictionary scan (pDictionaryScan class on the UM)
  * TODO: Move this & the impl into different files
  */
diff --git a/primitives/primproc/primproc.cpp b/primitives/primproc/primproc.cpp
index 3fbd23d45..79222f216 100644
--- a/primitives/primproc/primproc.cpp
+++ b/primitives/primproc/primproc.cpp
@@ -148,17 +148,19 @@ void setupSignalHandlers()
 #endif
 }
 
-void setupCwd(Config* cf)
+int8_t setupCwd(Config* cf)
 {
     string workdir = startup::StartUp::tmpDir();
 
     if (workdir.length() == 0)
         workdir = ".";
 
-    (void)chdir(workdir.c_str());
+    int8_t rc = chdir(workdir.c_str());
 
-    if (access(".", W_OK) != 0)
-        (void)chdir("/tmp");
+    if (rc < 0 || access(".", W_OK) != 0)
+        rc = chdir("/tmp");
+    
+    return rc;
 }
 
 int setupResources()
@@ -344,11 +346,11 @@ int main(int argc, char* argv[])
 
     setupSignalHandlers();
 
-    setupCwd(cf);
+    int err = 0;
+    err = setupCwd(cf);
 
     mlp = new primitiveprocessor::Logger();
 
-    int err = 0;
     if (!gDebug)
         err = setupResources();
     string errMsg;
@@ -368,6 +370,10 @@ int main(int argc, char* argv[])
             errMsg = "Could not install file limits to required value, please see non-root install documentation";
             break;
 
+        case -5:
+            errMsg = "Could not change into working directory";
+            break;
+
         default:
             break;
     }
diff --git a/procmgr/CMakeLists.txt b/procmgr/CMakeLists.txt
index 642890e13..99320901d 100644
--- a/procmgr/CMakeLists.txt
+++ b/procmgr/CMakeLists.txt
@@ -8,6 +8,8 @@ set(ProcMgr_SRCS main.cpp processmanager.cpp ../utils/common/crashtrace.cpp)
 
 add_executable(ProcMgr ${ProcMgr_SRCS})
 
+target_compile_options(ProcMgr PRIVATE -Wno-unused-result)
+
 target_link_libraries(ProcMgr ${ENGINE_LDFLAGS} cacheutils ${NETSNMP_LIBRARIES} ${MARIADB_CLIENT_LIBS} ${ENGINE_EXEC_LIBS})
 
 install(TARGETS ProcMgr DESTINATION ${ENGINE_BINDIR} COMPONENT platform)
diff --git a/procmgr/processmanager.cpp b/procmgr/processmanager.cpp
index 686243f87..f05a7dcbf 100644
--- a/procmgr/processmanager.cpp
+++ b/procmgr/processmanager.cpp
@@ -1377,7 +1377,7 @@ void processMSG(messageqcpp::IOSocket* cfIos)
                     // all transactions to finish or rollback as commanded. This is only set if
                     // there are, in fact, transactions active (or cpimport).
 
-                    int retStatus = oam::API_SUCCESS;
+                    //int retStatus = oam::API_SUCCESS;
 
                     if (HDFS)
                     {
@@ -1458,7 +1458,7 @@ void processMSG(messageqcpp::IOSocket* cfIos)
                                 if (opState == oam::MAN_DISABLED || opState == oam::AUTO_DISABLED)
                                     continue;
 
-                                retStatus = processManager.shutdownModule((*pt).DeviceName, graceful, manualFlag, 0);
+                                processManager.shutdownModule((*pt).DeviceName, graceful, manualFlag, 0);
                             }
                         }
                     }
@@ -3735,8 +3735,9 @@ int ProcessManager::disableModule(string target, bool manualFlag)
 
     //Update DBRM section of Columnstore.xml
     if ( updateWorkerNodeconfig() != API_SUCCESS )
+    {
         return API_FAILURE;
-
+    }
 	processManager.recycleProcess(target);
 
 	//check for SIMPLEX Processes on mate might need to be started
@@ -5144,7 +5145,7 @@ int ProcessManager::addModule(oam::DeviceNetworkList devicenetworklist, std::str
 
 					string loginTmp = tmpLogDir + "/login_test.log";
                     string cmd = installDir + "/bin/remote_command.sh " + IPAddr + " " + password + " 'ls' 1  > " + loginTmp;
-                    int rtnCode = system(cmd.c_str());
+                    system(cmd.c_str());
 
 					if (!oam.checkLogStatus(loginTmp, "README")) {
                         //check for RSA KEY ISSUE and fix
@@ -7728,7 +7729,8 @@ void startSystemThread(oam::DeviceNetworkList Devicenetworklist)
 				sleep(2);
 		}
 
-        if ( rtn = oam::ACTIVE )
+        // This was logical error and possible source of many problems. 
+        if ( rtn == oam::ACTIVE )
 			//set query system state not ready
 			processManager.setQuerySystemState(true);
 
@@ -7869,8 +7871,8 @@ void stopSystemThread(oam::DeviceNetworkList Devicenetworklist)
     SystemModuleTypeConfig systemmoduletypeconfig;
     ALARMManager aManager;
     int status = API_SUCCESS;
-    bool exitThread = false;
-    int exitThreadStatus = oam::API_SUCCESS;
+    //bool exitThread = false;
+    //int exitThreadStatus = oam::API_SUCCESS;
 
     pthread_t ThreadId;
     ThreadId = pthread_self();
@@ -7887,16 +7889,16 @@ void stopSystemThread(oam::DeviceNetworkList Devicenetworklist)
         log.writeLog(__LINE__, "EXCEPTION ERROR on getSystemConfig: " + error, LOG_TYPE_ERROR);
         stopsystemthreadStatus = oam::API_FAILURE;
         processManager.setSystemState(oam::FAILED);
-        exitThread = true;
-        exitThreadStatus = oam::API_FAILURE;
+        //exitThread = true;
+        //exitThreadStatus = oam::API_FAILURE;
     }
     catch (...)
     {
         log.writeLog(__LINE__, "EXCEPTION ERROR on getSystemConfig: Caught unknown exception!", LOG_TYPE_ERROR);
         stopsystemthreadStatus = oam::API_FAILURE;
         processManager.setSystemState(oam::FAILED);
-        exitThread = true;
-        exitThreadStatus = oam::API_FAILURE;
+        //exitThread = true;
+        //exitThreadStatus = oam::API_FAILURE;
     }
 
     if ( devicenetworklist.size() != 0 )
@@ -7920,7 +7922,7 @@ void stopSystemThread(oam::DeviceNetworkList Devicenetworklist)
             try
             {
                 int opState;
-                bool degraded = oam::ACTIVE;
+                bool degraded;
                 oam.getModuleStatus(moduleName, opState, degraded);
 
                 if (opState == oam::MAN_DISABLED || opState == oam::AUTO_DISABLED)
diff --git a/procmon/CMakeLists.txt b/procmon/CMakeLists.txt
index 8bfff3c5a..bd6efcceb 100644
--- a/procmon/CMakeLists.txt
+++ b/procmon/CMakeLists.txt
@@ -8,6 +8,8 @@ set(ProcMon_SRCS main.cpp processmonitor.cpp ../utils/common/crashtrace.cpp)
 
 add_executable(ProcMon ${ProcMon_SRCS})
 
+target_compile_options(ProcMon PRIVATE -Wno-unused-result)
+
 target_link_libraries(ProcMon ${ENGINE_LDFLAGS} cacheutils ${NETSNMP_LIBRARIES} ${MARIADB_CLIENT_LIBS} ${ENGINE_EXEC_LIBS})
 
 install(TARGETS ProcMon DESTINATION ${ENGINE_BINDIR} COMPONENT platform)
diff --git a/procmon/processmonitor.cpp b/procmon/processmonitor.cpp
index 9a8f4b8cd..f22be1b87 100644
--- a/procmon/processmonitor.cpp
+++ b/procmon/processmonitor.cpp
@@ -1497,7 +1497,6 @@ void ProcessMonitor::processMessage(messageqcpp::ByteStream msg, messageqcpp::IO
             string configureModuleName;
             msg >> configureModuleName;
 
-            uint16_t rtnCode;
             int requestStatus = API_SUCCESS;
 
             configureModule(configureModuleName);
@@ -2220,7 +2219,8 @@ pid_t ProcessMonitor::startProcess(string processModuleType, string processName,
                                    string RunType, string DepProcessName[MAXDEPENDANCY],
                                    string DepModuleName[MAXDEPENDANCY], string LogFile, uint16_t initType,  uint16_t actIndicator)
 {
-    pid_t  newProcessID;
+    // Compiler complains about non-initialiased variable here.
+    pid_t  newProcessID = 0;
     char* argList[MAXARGUMENTS];
     unsigned int i = 0;
     MonitorLog log;
diff --git a/tools/configMgt/CMakeLists.txt b/tools/configMgt/CMakeLists.txt
index 0a2f88808..88a9667bc 100644
--- a/tools/configMgt/CMakeLists.txt
+++ b/tools/configMgt/CMakeLists.txt
@@ -8,6 +8,8 @@ set(autoInstaller_SRCS autoInstaller.cpp)
 
 add_executable(autoInstaller ${autoInstaller_SRCS})
 
+target_compile_options(autoInstaller PRIVATE -Wno-unused-result)
+
 target_link_libraries(autoInstaller ${ENGINE_LDFLAGS} ${NETSNMP_LIBRARIES} ${MARIADB_CLIENT_LIBS} ${ENGINE_EXEC_LIBS} readline ncurses)
 
 install(TARGETS autoInstaller DESTINATION ${ENGINE_BINDIR})
@@ -22,15 +24,3 @@ add_executable(autoConfigure ${autoConfigure_SRCS})
 target_link_libraries(autoConfigure ${ENGINE_LDFLAGS} ${NETSNMP_LIBRARIES} ${MARIADB_CLIENT_LIBS} ${ENGINE_EXEC_LIBS})
 
 install(TARGETS autoConfigure DESTINATION ${ENGINE_BINDIR} COMPONENT platform)
-
-
-########### next target ###############
-
-set(svnQuery_SRCS svnQuery.cpp)
-
-add_executable(svnQuery ${svnQuery_SRCS})
-
-target_link_libraries(svnQuery ${ENGINE_LDFLAGS} ${NETSNMP_LIBRARIES} ${MARIADB_CLIENT_LIBS} ${ENGINE_EXEC_LIBS})
-
-install(TARGETS svnQuery DESTINATION ${ENGINE_BINDIR})
-
diff --git a/tools/configMgt/autoInstaller.cpp b/tools/configMgt/autoInstaller.cpp
index fa748056d..7dfb934e9 100644
--- a/tools/configMgt/autoInstaller.cpp
+++ b/tools/configMgt/autoInstaller.cpp
@@ -637,7 +637,7 @@ int main(int argc, char* argv[])
                             // Columnstore.xml found
 
                             //try to parse it
-                            Config* sysConfigOld;
+                            //Config* sysConfigOld;
 
                             ofstream file("/dev/null");
 
@@ -649,7 +649,7 @@ int main(int argc, char* argv[])
                                 // redirect cout to /dev/null
                                 cerr.rdbuf(file.rdbuf());
 
-                                sysConfigOld = Config::makeConfig( systemDir + "/Columnstore.xml");
+                                //sysConfigOld = Config::makeConfig( systemDir + "/Columnstore.xml");
 
                                 // restore cout stream buffer
                                 cerr.rdbuf (strm_buffer);
diff --git a/tools/dbbuilder/dbbuilder.cpp b/tools/dbbuilder/dbbuilder.cpp
index 31e33c7df..7fbecf4e7 100644
--- a/tools/dbbuilder/dbbuilder.cpp
+++ b/tools/dbbuilder/dbbuilder.cpp
@@ -59,11 +59,11 @@ int setUp()
 {
 #ifndef _MSC_VER
 	string cmd = "/bin/rm -f " + logFile + " >/dev/null 2>&1";
-    (void)system(cmd.c_str());
+    int rc = system(cmd.c_str());
     cmd = "/bin/touch -f " + logFile + " >/dev/null 2>&1";
-    (void)system(cmd.c_str());
+    rc = system(cmd.c_str());
 #endif
-    return 0;
+    return rc;
 }
 
 int checkNotThere(WriteEngine::FID fid)
@@ -73,12 +73,6 @@ int checkNotThere(WriteEngine::FID fid)
     return (fileOp.existsOIDDir(fid) ? -1 : 0);
 }
 
-void tearDown()
-{
-	string file = tmpDir + "/oidbitmap";
-    unlink(file.c_str());
-}
-
 void usage()
 {
     cerr << "Usage: dbbuilder [-h|f] function" << endl
@@ -131,6 +125,7 @@ int main(int argc, char* argv[])
     std::string schema("tpch");
     Oam oam;
     bool fFlg = false;
+    int rc = 0;
 
     opterr = 0;
 
@@ -194,7 +189,10 @@ int main(int argc, char* argv[])
 
     if ( buildOption == SYSCATALOG_ONLY )
     {
-        setUp();
+        if ( setUp() )
+        {
+            cerr << "setUp() call error " << endl;
+        }
 
         bool canWrite = true;
 
@@ -210,9 +208,13 @@ int main(int argc, char* argv[])
                              "' > " + logFile;
 
                 if (canWrite)
-                    (void)system(cmd.c_str());
+                {
+                    rc = system(cmd.c_str());
+                }
                 else
+                {
                     cerr << cmd << endl;
+                }
 
                 errorHandler(sysCatalogErr,
                              "Build system catalog",
@@ -244,7 +246,7 @@ int main(int argc, char* argv[])
                 string cmd(string("echo 'FAILED: ") + ex.what() + "' > " + logFile);
 
                 if (canWrite)
-                    (void)system(cmd.c_str());
+                    rc = system(cmd.c_str());
                 else
                     cerr << cmd << endl;
 
@@ -256,7 +258,7 @@ int main(int argc, char* argv[])
                 string cmd = "echo 'FAILED:  HDFS checking.' > " + logFile;
 
                 if (canWrite)
-                    (void)system(cmd.c_str());
+                    rc = system(cmd.c_str());
                 else
                     cerr << cmd << endl;
 
@@ -275,7 +277,7 @@ int main(int argc, char* argv[])
             std::string cmd = "echo 'OK: buildOption=" + oam.itoa(buildOption) + "' > " + logFile;
 
             if (canWrite)
-                (void)system(cmd.c_str());
+                rc = system(cmd.c_str());
             else
 #ifdef _MSC_VER
                 (void)0;
@@ -288,11 +290,9 @@ int main(int argc, char* argv[])
 
             if (canWrite)
             {
-                int err;
+                rc = system(cmd.c_str());
 
-                err = system(cmd.c_str());
-
-                if (err != 0)
+                if (rc != 0)
                 {
                     ostringstream os;
                     os << "Warning: running " << cmd << " failed.  This is usually non-fatal.";
@@ -310,7 +310,7 @@ int main(int argc, char* argv[])
             string cmd = "echo 'FAILED: buildOption=" + oam.itoa(buildOption) + "' > " + logFile;
 
             if (canWrite)
-                (void)system(cmd.c_str());
+                rc = system(cmd.c_str());
             else
                 cerr << cmd << endl;
 
@@ -321,7 +321,7 @@ int main(int argc, char* argv[])
             string cmd = "echo 'FAILED: buildOption=" + oam.itoa(buildOption) + "' > " + logFile;
 
             if (canWrite)
-                (void)system(cmd.c_str());
+                rc = system(cmd.c_str());
             else
                 cerr << cmd << endl;
 
diff --git a/tools/dbloadxml/colxml.cpp b/tools/dbloadxml/colxml.cpp
index 87ef4b1a8..69be8d61e 100644
--- a/tools/dbloadxml/colxml.cpp
+++ b/tools/dbloadxml/colxml.cpp
@@ -44,11 +44,11 @@ using namespace bulkloadxml;
 int main(int argc, char** argv)
 {
     const int DEBUG_LVL_TO_DUMP_SYSCAT_RPT = 4;
-#ifdef _MSC_VER
-    //FIXME
-#else
-    setuid( 0 ); // set effective ID to root; ignore return status
-#endif
+    // set effective ID to root
+    if( setuid( 0 ) < 0 )
+    {
+        std::cerr << " colxml: setuid failed " << std::endl;
+    }
     setlocale(LC_ALL, "");
     WriteEngine::Config::initConfigCache(); // load Columnstore.xml config settings
 
diff --git a/utils/cacheutils/cacheutils.cpp b/utils/cacheutils/cacheutils.cpp
index 99944ec7f..ca56e2da0 100644
--- a/utils/cacheutils/cacheutils.cpp
+++ b/utils/cacheutils/cacheutils.cpp
@@ -258,7 +258,8 @@ int flushOIDsFromCache(const vector<BRM::OID_t>& oids)
     ISMPacketHeader ism;
     uint32_t i;
 
-    memset(&ism, 0, sizeof(ISMPacketHeader));
+    void *ismp = static_cast<void*>(&ism);
+    memset(ismp, 0, sizeof(ISMPacketHeader));
     ism.Command = CACHE_FLUSH_BY_OID;
     bs.load((uint8_t*) &ism, sizeof(ISMPacketHeader));
     bs << (uint32_t) oids.size();
@@ -285,7 +286,8 @@ int flushPartition(const std::vector<BRM::OID_t>& oids, set<BRM::LogicalPartitio
     ByteStream bs;
     ISMPacketHeader ism;
 
-    memset(&ism, 0, sizeof(ISMPacketHeader));
+    void *ismp = static_cast<void*>(&ism);
+    memset(ismp, 0, sizeof(ISMPacketHeader));
     ism.Command = CACHE_FLUSH_PARTITION;
     bs.load((uint8_t*) &ism, sizeof(ISMPacketHeader));
     serializeSet<BRM::LogicalPartition>(bs, partitionNums);
diff --git a/utils/compress/version1.cpp b/utils/compress/version1.cpp
index 945e2617a..ab93bd325 100644
--- a/utils/compress/version1.cpp
+++ b/utils/compress/version1.cpp
@@ -90,6 +90,8 @@ namespace
 {
 short DSPort = 9199;
 
+// this isn't currently used but could be in the future.
+#if 0
 void log(const string& s)
 {
     logging::MessageLog logger((logging::LoggingID()));
@@ -100,6 +102,7 @@ void log(const string& s)
     message.format(args);
     logger.logErrorMessage(message);
 }
+#endif
 
 struct ScopedCleaner
 {
diff --git a/utils/dataconvert/dataconvert.cpp b/utils/dataconvert/dataconvert.cpp
index d028bae2f..15a200d3b 100644
--- a/utils/dataconvert/dataconvert.cpp
+++ b/utils/dataconvert/dataconvert.cpp
@@ -83,19 +83,6 @@ bool from_string(T& t, const std::string& s, std::ios_base & (*f)(std::ios_base&
     return !(iss >> f >> t).fail();
 }
 
-uint64_t pow10_(int32_t scale)
-{
-    if (scale <= 0) return 1;
-
-    idbassert(scale < 20);
-    uint64_t res = 1;
-
-    for (int32_t i = 0; i < scale; i++)
-        res *= 10;
-
-    return res;
-}
-
 bool number_value ( const string& data )
 {
     for (unsigned int i = 0; i < strlen(data.c_str()); i++)
@@ -893,7 +880,6 @@ bool mysql_str_to_datetime( const string& input, DateTime& output, bool& isDate
 
 bool mysql_str_to_time( const string& input, Time& output, long decimals )
 {
-//    int32_t datesepct = 0;
     uint32_t dtend = 0;
     bool isNeg = false;
 
@@ -1779,7 +1765,8 @@ int32_t DataConvert::convertColumnDate(
 bool DataConvert::isColumnDateValid( int32_t date )
 {
     Date d;
-    memcpy(&d, &date, sizeof(int32_t));
+    void* dp = static_cast<void*>(&d);
+    memcpy(dp, &date, sizeof(int32_t));
     return (isDateValid(d.day, d.month, d.year));
 }
 
@@ -2081,7 +2068,8 @@ int64_t DataConvert::convertColumnTime(
 bool DataConvert::isColumnDateTimeValid( int64_t dateTime )
 {
     DateTime dt;
-    memcpy(&dt, &dateTime, sizeof(uint64_t));
+    void* dtp = static_cast<void*>(&dt);
+    memcpy(dtp, &dateTime, sizeof(uint64_t));
 
     if (isDateValid(dt.day, dt.month, dt.year))
         return isDateTimeValid(dt.hour, dt.minute, dt.second, dt.msecond);
@@ -2092,7 +2080,8 @@ bool DataConvert::isColumnDateTimeValid( int64_t dateTime )
 bool DataConvert::isColumnTimeValid( int64_t time )
 {
     Time dt;
-    memcpy(&dt, &time, sizeof(uint64_t));
+    void* dtp = static_cast<void*>(&dt);
+    memcpy(dtp, &time, sizeof(uint64_t));
 
     return isTimeValid(dt.hour, dt.minute, dt.second, dt.msecond);
 }
@@ -2178,7 +2167,8 @@ std::string DataConvert::datetimeToString1( long long  datetimevalue )
 {
     // @bug 4703 abandon multiple ostringstream's for conversion
     DateTime dt(datetimevalue);
-    const int DATETIMETOSTRING1_LEN = 22; // YYYYMMDDHHMMSSmmmmmm\0
+    // Interesting, gcc 7 says the sprintf below generates between 21 and 23 bytes of output.
+    const int DATETIMETOSTRING1_LEN = 23; // YYYYMMDDHHMMSSmmmmmm\0
     char buf[DATETIMETOSTRING1_LEN];
 
     sprintf(buf, "%04d%02d%02d%02d%02d%02d%06d", dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second, dt.msecond);
@@ -2443,11 +2433,10 @@ int64_t DataConvert::stringToDatetime(const string& data, bool* date)
         return -1;
 }
 
+/* This is really painful and expensive b/c it seems the input is not normalized or
+sanitized.  That should really be done on ingestion. */
 int64_t DataConvert::intToDate(int64_t data)
 {
-    //char buf[10] = {0};
-    //snprintf( buf, 10, "%llu", (long long unsigned int)data);
-    //string date = buf;
     char buf[21] = {0};
     Date aday;
 
@@ -2459,7 +2448,16 @@ int64_t DataConvert::intToDate(int64_t data)
         return *(reinterpret_cast<uint32_t*>(&aday));
     }
 
+    // this snprintf call causes a compiler warning b/c we're potentially copying a 20-digit #
+    // into 15 bytes, however, that appears to be intentional.
+#if defined(__GNUC__) && __GNUC__ >= 6
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wformat-truncation="
     snprintf( buf, 15, "%llu", (long long unsigned int)data);
+#pragma GCC diagnostic pop
+#else
+    snprintf( buf, 15, "%llu", (long long unsigned int)data);
+#endif
 
     string year, month, day, hour, min, sec, msec;
     int64_t y = 0, m = 0, d = 0, h = 0, minute = 0, s = 0, ms = 0;
@@ -2562,6 +2560,8 @@ int64_t DataConvert::intToDate(int64_t data)
     return *(reinterpret_cast<uint32_t*>(&aday));
 }
 
+/* This is really painful and expensive b/c it seems the input is not normalized or
+sanitized.  That should really be done on ingestion. */
 int64_t DataConvert::intToDatetime(int64_t data, bool* date)
 {
     bool isDate = false;
@@ -2584,7 +2584,17 @@ int64_t DataConvert::intToDatetime(int64_t data, bool* date)
         return *(reinterpret_cast<uint64_t*>(&adaytime));
     }
 
+    // this snprintf call causes a compiler warning b/c we're potentially copying a 20-digit #
+    // into 15 bytes, however, that appears to be intentional.
+#if defined(__GNUC__) && __GNUC__ >= 6
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wformat-truncation="
     snprintf( buf, 15, "%llu", (long long unsigned int)data);
+#pragma GCC diagnostic pop
+#else
+    snprintf( buf, 15, "%llu", (long long unsigned int)data);
+#endif
+
     //string date = buf;
     string year, month, day, hour, min, sec, msec;
     int64_t y = 0, m = 0, d = 0, h = 0, minute = 0, s = 0, ms = 0;
@@ -2692,6 +2702,8 @@ int64_t DataConvert::intToDatetime(int64_t data, bool* date)
     return *(reinterpret_cast<uint64_t*>(&adaytime));
 }
 
+/* This is really painful and expensive b/c it seems the input is not normalized or
+sanitized.  That should really be done on ingestion. */
 int64_t DataConvert::intToTime(int64_t data, bool fromString)
 {
     char buf[21] = {0};
@@ -2710,7 +2722,17 @@ int64_t DataConvert::intToTime(int64_t data, bool fromString)
         return *(reinterpret_cast<int64_t*>(&atime));
     }
 
+    // this snprintf call causes a compiler warning b/c we're potentially copying a 20-digit #
+    // into 15 bytes, however, that appears to be intentional.
+#if defined(__GNUC__) && __GNUC__ >= 6
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wformat-truncation="
     snprintf( buf, 15, "%llu", (long long unsigned int)data);
+#pragma GCC diagnostic pop
+#else
+    snprintf( buf, 15, "%llu", (long long unsigned int)data);
+#endif
+
     //string date = buf;
     string hour, min, sec, msec;
     int64_t h = 0, minute = 0, s = 0, ms = 0;
diff --git a/utils/dataconvert/dataconvert.h b/utils/dataconvert/dataconvert.h
index a6ce20198..d563f5fea 100644
--- a/utils/dataconvert/dataconvert.h
+++ b/utils/dataconvert/dataconvert.h
@@ -673,12 +673,24 @@ inline void DataConvert::timeToString1( long long timevalue, char* buf, unsigned
         buf++;
         buflen--;
     }
-
+    // this snprintf call causes a compiler warning b/c buffer size is less
+    // then maximum string size.
+#if defined(__GNUC__) && __GNUC__ >= 6
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wformat-truncation="
     snprintf( buf, buflen, "%02d%02d%02d",
               hour,
               (unsigned)((timevalue >> 32) & 0xff),
               (unsigned)((timevalue >> 14) & 0xff)
             );
+#pragma GCC diagnostic pop
+#else
+    snprintf( buf, buflen, "%02d%02d%02d",
+              hour,
+              (unsigned)((timevalue >> 32) & 0xff),
+              (unsigned)((timevalue >> 14) & 0xff)
+            );
+#endif
 }
 
 inline std::string DataConvert::decimalToString(int64_t value, uint8_t scale, execplan::CalpontSystemCatalog::ColDataType colDataType)
diff --git a/utils/funcexp/func_insert.cpp b/utils/funcexp/func_insert.cpp
index 88d731eb4..20109c27b 100644
--- a/utils/funcexp/func_insert.cpp
+++ b/utils/funcexp/func_insert.cpp
@@ -89,11 +89,13 @@ std::string Func_insert::getStrVal(rowgroup::Row& row,
                                    execplan::CalpontSystemCatalog::ColType&)
 {
 	string tstr;
+	string tnewstr;
     stringValue(fp[0], row, isNull, tstr);
     if (isNull)
+    {
         return "";
+    }
 
-	string tnewstr;
     stringValue(fp[3], row, isNull, tnewstr);
     if (isNull)
         return "";
diff --git a/utils/funcexp/func_lpad.cpp b/utils/funcexp/func_lpad.cpp
index b5acfd362..fbb5ceca2 100644
--- a/utils/funcexp/func_lpad.cpp
+++ b/utils/funcexp/func_lpad.cpp
@@ -103,8 +103,6 @@ std::string Func_lpad::getStrVal(rowgroup::Row& row,
                 value += 0.5;
             else if (value < 0)
                 value -= 0.5;
-            else if (value < 0)
-                value -= 0.5;
 
             int64_t ret = (int64_t) value;
 
diff --git a/utils/funcexp/func_md5.cpp b/utils/funcexp/func_md5.cpp
index 4023ec4a0..9780c389d 100644
--- a/utils/funcexp/func_md5.cpp
+++ b/utils/funcexp/func_md5.cpp
@@ -82,7 +82,7 @@ typedef unsigned      char uchar;
 
 char* PrintMD5(uchar md5Digest[16]);
 char* MD5String(const char* szString);
-char* MD5File(char* szFilename);
+//char* MD5File(char* szFilename);
 
 class md5
 {
@@ -236,6 +236,7 @@ char* PrintMD5(uchar md5Digest[16])
     char chBuffer[256];
     char chEach[10];
     int nCount;
+    size_t chEachSize = 0;
 
     memset(chBuffer, 0, 256);
     memset(chEach, 0, 10);
@@ -243,7 +244,8 @@ char* PrintMD5(uchar md5Digest[16])
     for (nCount = 0; nCount < 16; nCount++)
     {
         sprintf(chEach, "%02x", md5Digest[nCount]);
-        strncat(chBuffer, chEach, sizeof(chEach));
+        chEachSize = sizeof(chEach);
+        strncat(chBuffer, chEach, chEachSize);
     }
 
     return strdup(chBuffer);
@@ -263,7 +265,9 @@ char* MD5String(const char* szString)
 
 }
 
-// MD5File: Performs the MD5 algorithm on a file (binar or text),
+// this fcn isn't used, so commenting it
+#if 0
+// MD5File: Performs the MD5 algorithm on a file (binary or text),
 // returning the results as a char*.  Returns NULL if it fails.
 char* MD5File(char* szFilename)
 {
@@ -295,7 +299,7 @@ char* MD5File(char* szFilename)
 
     return NULL; // failed
 }
-
+#endif
 
 // md5::Init
 // Initializes a new context.
diff --git a/utils/funcexp/func_repeat.cpp b/utils/funcexp/func_repeat.cpp
index b99114c5a..d79d16de1 100644
--- a/utils/funcexp/func_repeat.cpp
+++ b/utils/funcexp/func_repeat.cpp
@@ -93,7 +93,7 @@ std::string Func_repeat::getStrVal(rowgroup::Row& row,
 
     for ( int i = 0 ; i < count ; i ++ )
     {
-        if (strcat(result, str.c_str()) == NULL)
+        if (strcat(result, str.c_str()) == NULL) //questionable check
             return "";
     }
 
diff --git a/utils/funcexp/func_substring_index.cpp b/utils/funcexp/func_substring_index.cpp
index f68679992..04d4d9b12 100644
--- a/utils/funcexp/func_substring_index.cpp
+++ b/utils/funcexp/func_substring_index.cpp
@@ -76,7 +76,7 @@ std::string Func_substring_index::getStrVal(rowgroup::Row& row,
     if ( count >  end )
         return str;
 
-    if (( count < 0 ) && ((count * -1) > end))
+    if (( count < 0 ) && ((count * -1) > (int64_t) end))
         return str;
 
     string value = str;
@@ -99,8 +99,7 @@ std::string Func_substring_index::getStrVal(rowgroup::Row& row,
     }
     else
     {
-        count = count * -1;
-        size_t end = strlen(str.c_str());
+        count = -count;
         int pointer = end;
         int start = 0;
 
diff --git a/utils/idbdatafile/PosixFileSystem.cpp b/utils/idbdatafile/PosixFileSystem.cpp
index 48413b62a..f52bdc56a 100644
--- a/utils/idbdatafile/PosixFileSystem.cpp
+++ b/utils/idbdatafile/PosixFileSystem.cpp
@@ -261,7 +261,7 @@ int PosixFileSystem::listDirectory(const char* pathname, std::list<std::string>&
             contents.push_back( itr->path().filename().generic_string() );
         }
     }
-    catch (std::exception)
+    catch (std::exception &)
     {
         ret = -1;
     }
diff --git a/utils/idbhdfs/hdfs-shared/HdfsRdwrFileBuffer.cpp b/utils/idbhdfs/hdfs-shared/HdfsRdwrFileBuffer.cpp
index cab6ba545..bd0ce32d6 100644
--- a/utils/idbhdfs/hdfs-shared/HdfsRdwrFileBuffer.cpp
+++ b/utils/idbhdfs/hdfs-shared/HdfsRdwrFileBuffer.cpp
@@ -151,7 +151,7 @@ HdfsRdwrFileBuffer::HdfsRdwrFileBuffer(const char* fname, const char* mode, unsi
 
 // This constructor is for use by HdfsRdwrMemBuffer to create a file buffer when we
 // run out of memory.
-HdfsRdwrFileBuffer::HdfsRdwrFileBuffer(HdfsRdwrMemBuffer* pMemBuffer) throw (std::exception) :
+HdfsRdwrFileBuffer::HdfsRdwrFileBuffer(HdfsRdwrMemBuffer* pMemBuffer) :
     IDBDataFile(pMemBuffer->name().c_str()),
     m_buffer(NULL),
     m_dirty(false)
diff --git a/utils/idbhdfs/hdfs-shared/HdfsRdwrFileBuffer.h b/utils/idbhdfs/hdfs-shared/HdfsRdwrFileBuffer.h
index 8b922f97a..cfe159e1d 100644
--- a/utils/idbhdfs/hdfs-shared/HdfsRdwrFileBuffer.h
+++ b/utils/idbhdfs/hdfs-shared/HdfsRdwrFileBuffer.h
@@ -50,7 +50,7 @@ class HdfsRdwrFileBuffer: public IDBDataFile, boost::noncopyable
 {
 public:
     HdfsRdwrFileBuffer(const char* fname, const char* mode, unsigned opts);
-    HdfsRdwrFileBuffer(HdfsRdwrMemBuffer* pMemBuffer) throw (std::exception);
+    HdfsRdwrFileBuffer(HdfsRdwrMemBuffer* pMemBuffer);
     /* virtual */ ~HdfsRdwrFileBuffer();
 
     /* virtual */ ssize_t pread(void* ptr, off64_t offset, size_t count);
diff --git a/utils/loggingcpp/messagelog.cpp b/utils/loggingcpp/messagelog.cpp
index 603aec6a7..a1dd850e2 100644
--- a/utils/loggingcpp/messagelog.cpp
+++ b/utils/loggingcpp/messagelog.cpp
@@ -180,21 +180,21 @@ const string MessageLog::format(const Message& msg, const char prefix)
 void MessageLog::logDebugMessage(const Message& msg)
 {
     ::openlog(SubsystemID[fLogData.fSubsysID].c_str(), 0 | LOG_PID, fFacility);
-    ::syslog(LOG_DEBUG, format(msg, 'D').c_str());
+    ::syslog(LOG_DEBUG, "%s", format(msg, 'D').c_str());
     ::closelog();
 }
 
 void MessageLog::logInfoMessage(const Message& msg)
 {
     ::openlog(SubsystemID[fLogData.fSubsysID].c_str(), 0 | LOG_PID, fFacility);
-    ::syslog(LOG_INFO, format(msg, 'I').c_str());
+    ::syslog(LOG_INFO, "%s", format(msg, 'I').c_str());
     ::closelog();
 }
 
 void MessageLog::logWarningMessage(const Message& msg)
 {
     ::openlog(SubsystemID[fLogData.fSubsysID].c_str(), 0 | LOG_PID, fFacility);
-    ::syslog(LOG_WARNING, format(msg, 'W').c_str());
+    ::syslog(LOG_WARNING, "%s", format(msg, 'W').c_str());
     ::closelog();
 }
 
@@ -202,14 +202,14 @@ void MessageLog::logErrorMessage(const Message& msg)
 {
     // @bug 24 use 'E' instead of 'S'
     ::openlog(SubsystemID[fLogData.fSubsysID].c_str(), 0 | LOG_PID, fFacility);
-    ::syslog(LOG_ERR, format(msg, 'E').c_str());
+    ::syslog(LOG_ERR, "%s", format(msg, 'E').c_str());
     ::closelog();
 }
 
 void MessageLog::logCriticalMessage(const Message& msg)
 {
     ::openlog(SubsystemID[fLogData.fSubsysID].c_str(), 0 | LOG_PID, fFacility);
-    ::syslog(LOG_CRIT, format(msg, 'C').c_str());
+    ::syslog(LOG_CRIT, "%s", format(msg, 'C').c_str());
     ::closelog();
 }
 //Bug 5218. comment out the following functions to alleviate issue where dml messages show up in crit.log. This
diff --git a/utils/messageqcpp/inetstreamsocket.cpp b/utils/messageqcpp/inetstreamsocket.cpp
index 2f5f82bb7..d94a3eb94 100644
--- a/utils/messageqcpp/inetstreamsocket.cpp
+++ b/utils/messageqcpp/inetstreamsocket.cpp
@@ -945,7 +945,6 @@ void InetStreamSocket::connect(const sockaddr* serv_addr)
     /* read a byte to artificially synchronize with accept() on the remote */
     int ret = -1;
     int e = EBADF;
-    char buf = '\0';
     struct pollfd pfd;
 
     long msecs = fConnectionTimeout.tv_sec * 1000 + fConnectionTimeout.tv_nsec / 1000000;
@@ -964,9 +963,19 @@ void InetStreamSocket::connect(const sockaddr* serv_addr)
     if (ret == 1)
     {
 #ifdef _MSC_VER
+        char buf = '\0';
         (void)::recv(socketParms().sd(), &buf, 1, 0);
 #else
-        (void)::read(socketParms().sd(), &buf, 1);
+#if defined(__GNUC__) && __GNUC__ >= 6
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-result"
+        char buf = '\0';
+        ::read(socketParms().sd(), &buf, 1);   // we know 1 byte is in the recv buffer
+#pragma GCC diagnostic pop
+#else
+        char buf = '\0';
+        ::read(socketParms().sd(), &buf, 1);   // we know 1 byte is in the recv buffer
+#endif // pragma
 #endif
         return;
     }
diff --git a/utils/querytele/queryteleprotoimpl.cpp b/utils/querytele/queryteleprotoimpl.cpp
index 2364d39ef..fa54a0adf 100644
--- a/utils/querytele/queryteleprotoimpl.cpp
+++ b/utils/querytele/queryteleprotoimpl.cpp
@@ -80,6 +80,7 @@ struct QStats
 
 QStats fQStats;
 
+#ifdef QUERY_TELE_DEBUG
 string get_trace_file()
 {
     ostringstream oss;
@@ -125,7 +126,9 @@ void log_query(const querytele::QueryTele& qtdata)
     trace << endl;
     trace.close();
 }
+#endif
 
+#ifdef QUERY_TELE_DEBUG
 const string st2str(enum querytele::StepType::type t)
 {
     switch (t)
@@ -172,7 +175,9 @@ const string st2str(enum querytele::StepType::type t)
 
     return "INV";
 }
+#endif
 
+#ifdef QUERY_TELE_DEBUG
 void log_step(const querytele::StepTele& stdata)
 {
     ofstream trace(get_trace_file().c_str(), ios::out | ios::app);
@@ -207,6 +212,7 @@ void log_step(const querytele::StepTele& stdata)
     trace << endl;
     trace.close();
 }
+#endif
 
 void TeleConsumer()
 {
diff --git a/utils/rwlock/rwlock.cpp b/utils/rwlock/rwlock.cpp
index d042b905e..64d413c52 100644
--- a/utils/rwlock/rwlock.cpp
+++ b/utils/rwlock/rwlock.cpp
@@ -32,7 +32,9 @@
 #include <tr1/unordered_map>
 #endif
 
+#ifndef NDEBUG
 #define NDEBUG
+#endif
 #include <cassert>
 using namespace std;
 
diff --git a/utils/threadpool/prioritythreadpool.cpp b/utils/threadpool/prioritythreadpool.cpp
index e25cd7af8..37ce34ffc 100644
--- a/utils/threadpool/prioritythreadpool.cpp
+++ b/utils/threadpool/prioritythreadpool.cpp
@@ -139,8 +139,8 @@ PriorityThreadPool::Priority PriorityThreadPool::pickAQueue(Priority preference)
 
 void PriorityThreadPool::threadFcn(const Priority preferredQueue) throw()
 {
-    Priority queue;
-    uint32_t weight, i;
+    Priority queue = LOW;
+    uint32_t weight, i = 0;
     vector<Job> runList;
     vector<bool> reschedule;
     uint32_t rescheduleCount;
diff --git a/utils/threadpool/threadpool.h b/utils/threadpool/threadpool.h
index 16754385d..27d87fd12 100644
--- a/utils/threadpool/threadpool.h
+++ b/utils/threadpool/threadpool.h
@@ -44,6 +44,8 @@
 #include <boost/shared_ptr.hpp>
 #include <boost/function.hpp>
 
+#include <memory>
+
 #if defined(_MSC_VER) && defined(xxxTHREADPOOL_DLLEXPORT)
 #define EXPORT __declspec(dllexport)
 #else
@@ -75,8 +77,13 @@ public:
     boost::thread* create_thread(F threadfunc)
     {
         boost::lock_guard<boost::shared_mutex> guard(m);
-        threads.push_back(new boost::thread(threadfunc));
-        return threads.back();
+#if defined(__GNUC__) && __GNUC__ >= 7
+        std::unique_ptr<boost::thread> new_thread(new boost::thread(threadfunc));
+#else
+        std::auto_ptr<boost::thread> new_thread(new boost::thread(threadfunc));
+#endif
+        threads.push_back(new_thread.get());
+        return new_thread.release();
     }
 
     void add_thread(boost::thread* thrd)
diff --git a/utils/udfsdk/mcsv1_udaf.h b/utils/udfsdk/mcsv1_udaf.h
index 0fcd877c9..afcbb362f 100644
--- a/utils/udfsdk/mcsv1_udaf.h
+++ b/utils/udfsdk/mcsv1_udaf.h
@@ -1027,6 +1027,10 @@ inline T mcsv1_UDAF::convertAnyTo(static_any::any& valIn)
     {
         val = valIn.cast<double>();
     }
+    else
+    {
+        throw runtime_error("mcsv1_UDAF::convertAnyTo(): input param has unrecognized type");
+    }
     return val;
 }
 
diff --git a/versioning/BRM/extentmap.cpp b/versioning/BRM/extentmap.cpp
index 6070ab1f2..2c0334030 100644
--- a/versioning/BRM/extentmap.cpp
+++ b/versioning/BRM/extentmap.cpp
@@ -1141,7 +1141,8 @@ void ExtentMap::loadVersion4(ifstream& in)
     in.read((char*) &flNumElements, sizeof(int));
     idbassert(emNumElements > 0);
 
-    memset(fExtentMap, 0, fEMShminfo->allocdSize);
+    void *fExtentMapPtr = static_cast<void*>(fExtentMap);
+    memset(fExtentMapPtr, 0, fEMShminfo->allocdSize);
     fEMShminfo->currentSize = 0;
 
     // init the free list
@@ -1226,7 +1227,8 @@ void ExtentMap::loadVersion4(IDBDataFile* in)
         throw runtime_error("ExtentMap::loadVersion4(): read failed. Check the error log.");
     }
 
-    memset(fExtentMap, 0, fEMShminfo->allocdSize);
+    void *fExtentMapPtr = static_cast<void*>(fExtentMap);
+    memset(fExtentMapPtr, 0, fEMShminfo->allocdSize);
     fEMShminfo->currentSize = 0;
 
     // init the free list
diff --git a/versioning/BRM/mastersegmenttable.cpp b/versioning/BRM/mastersegmenttable.cpp
index 047c647f8..54921b644 100644
--- a/versioning/BRM/mastersegmenttable.cpp
+++ b/versioning/BRM/mastersegmenttable.cpp
@@ -189,7 +189,8 @@ void MasterSegmentTable::makeMSTSegment()
 
 void MasterSegmentTable::initMSTData()
 {
-    memset(fShmDescriptors, 0, MSTshmsize);
+    void *dp = static_cast<void*>(&fShmDescriptors);
+    memset(dp, 0, MSTshmsize);
 }
 
 MSTEntry* MasterSegmentTable::getTable_read(int num, bool block) const
diff --git a/versioning/BRM/slavecomm.cpp b/versioning/BRM/slavecomm.cpp
index 55fe3a15b..d72138e49 100644
--- a/versioning/BRM/slavecomm.cpp
+++ b/versioning/BRM/slavecomm.cpp
@@ -51,12 +51,14 @@ using namespace idbdatafile;
 
 namespace
 {
+#ifdef USE_VERY_COMPLEX_DROP_CACHES
 void timespec_sub(const struct timespec& tv1,
                   const struct timespec& tv2,
                   double& tm)
 {
     tm = (double)(tv2.tv_sec - tv1.tv_sec) + 1.e-9 * (tv2.tv_nsec - tv1.tv_nsec);
 }
+#endif
 }
 
 namespace BRM
@@ -2176,8 +2178,12 @@ void SlaveComm::do_flushInodeCache()
 
     if ((fd = open("/proc/sys/vm/drop_caches", O_WRONLY)) >= 0)
     {
-        write(fd, "3\n", 2);
-        close(fd);
+        ssize_t written = write(fd, "3\n", 2);
+        int rc = close(fd);
+        if ( !written || rc )
+        {
+            std::cerr << "Could not write into or close /proc/sys/vm/drop_caches" << std::endl;
+        }
     }
 
 #endif
diff --git a/writeengine/bulk/cpimport.cpp b/writeengine/bulk/cpimport.cpp
index 94dc5ae1d..54b688d0b 100644
--- a/writeengine/bulk/cpimport.cpp
+++ b/writeengine/bulk/cpimport.cpp
@@ -830,10 +830,11 @@ void printInputSource(
         if (alternateImportDir == IMPORT_PATH_CWD)
         {
             char cwdBuf[4096];
-            ::getcwd(cwdBuf, sizeof(cwdBuf));
+            char *bufPtr = &cwdBuf[0];
+            bufPtr = ::getcwd(cwdBuf, sizeof(cwdBuf));
 
             if (!(BulkLoad::disableConsoleOutput()))
-                cout << "Input file(s) will be read from : " << cwdBuf << endl;
+                cout << "Input file(s) will be read from : " << bufPtr << endl;
         }
         else
         {
@@ -1021,7 +1022,11 @@ int main(int argc, char** argv)
 #ifdef _MSC_VER
     _setmaxstdio(2048);
 #else
-    setuid( 0 ); // set effective ID to root; ignore return status
+    // set effective ID to root
+    if( setuid( 0 ) < 0 )
+    {
+        std::cerr << " cpimport: setuid failed " << std::endl;
+    } 
 #endif
     setupSignalHandlers();
 
diff --git a/writeengine/bulk/we_tableinfo.cpp b/writeengine/bulk/we_tableinfo.cpp
index 92f8ac19f..e51c8e2c2 100644
--- a/writeengine/bulk/we_tableinfo.cpp
+++ b/writeengine/bulk/we_tableinfo.cpp
@@ -1460,9 +1460,11 @@ void TableInfo::writeBadRows( const std::vector<std::string>* errorDatRows,
 
             if (!p.has_root_path())
             {
+                // We could fail here having fixed size buffer
                 char cwdPath[4096];
-                getcwd(cwdPath, sizeof(cwdPath));
-                boost::filesystem::path rejectFileName2( cwdPath );
+                char* buffPtr = &cwdPath[0];
+                buffPtr = getcwd(cwdPath, sizeof(cwdPath));
+                boost::filesystem::path rejectFileName2( buffPtr );
                 rejectFileName2 /= fRejectDataFileName;
                 fBadFiles.push_back( rejectFileName2.string() );
 
@@ -1567,8 +1569,9 @@ void  TableInfo::writeErrReason( const std::vector< std::pair<RID,
             if (!p.has_root_path())
             {
                 char cwdPath[4096];
-                getcwd(cwdPath, sizeof(cwdPath));
-                boost::filesystem::path errFileName2( cwdPath );
+                char* buffPtr = &cwdPath[0];
+                buffPtr = getcwd(cwdPath, sizeof(cwdPath));
+                boost::filesystem::path errFileName2( buffPtr );
                 errFileName2 /= fRejectErrFileName;
                 fErrFiles.push_back( errFileName2.string() );
 
diff --git a/writeengine/dictionary/we_dctnry.cpp b/writeengine/dictionary/we_dctnry.cpp
index 3b77dae7a..460a48191 100644
--- a/writeengine/dictionary/we_dctnry.cpp
+++ b/writeengine/dictionary/we_dctnry.cpp
@@ -807,7 +807,8 @@ int Dctnry::insertDctnry(const char* buf,
     while (startPos < totalRow)
     {
         found = false;
-        memset(&curSig, 0, sizeof(curSig));
+        void *curSigPtr = static_cast<void*>(&curSig);
+        memset(curSigPtr, 0, sizeof(curSig));
         curSig.size = pos[startPos][col].offset;
 
         // Strip trailing null bytes '\0' (by adjusting curSig.size) if import-
@@ -1321,7 +1322,8 @@ void  Dctnry::preLoadStringCache( const DataBlock& fileBlock )
 
     int op = 1; // ordinal position of the string within the block
     Signature aSig;
-    memset( &aSig, 0, sizeof(Signature));
+    void *aSigPtr = static_cast<void*>(&aSig);
+    memset(aSigPtr, 0, sizeof(aSig));
 
     while ((offBeg != DCTNRY_END_HEADER) &&
             (op     <= MAX_STRING_CACHE_SIZE))
@@ -1365,8 +1367,10 @@ void  Dctnry::preLoadStringCache( const DataBlock& fileBlock )
  ******************************************************************************/
 void  Dctnry::addToStringCache( const Signature& newSig )
 {
+    // We better add constructors that sets everything to 0;
     Signature asig;
-    memset(&asig, 0, sizeof(Signature));
+    void *aSigPtr = static_cast<void*>(&asig);
+    memset(aSigPtr, 0, sizeof(asig));
     asig.signature = new unsigned char[newSig.size];
     memcpy(asig.signature, newSig.signature, newSig.size );
     asig.size      = newSig.size;
diff --git a/writeengine/server/we_ddlcommandproc.cpp b/writeengine/server/we_ddlcommandproc.cpp
index 19475ccbe..f536c2430 100644
--- a/writeengine/server/we_ddlcommandproc.cpp
+++ b/writeengine/server/we_ddlcommandproc.cpp
@@ -2469,7 +2469,8 @@ uint8_t WE_DDLCommandProc::updateSyscolumnTablename(ByteStream& bs, std::string&
 
 
     //It's the same string for each column, so we just need one dictionary struct
-    memset(&dictTuple, 0, sizeof(dictTuple));
+    void *dictTuplePtr = static_cast<void*>(&dictTuple);
+    memset(dictTuplePtr, 0, sizeof(dictTuple));
     dictTuple.sigValue = (unsigned char*)newTablename.c_str();
     dictTuple.sigSize = newTablename.length();
     dictTuple.isNull = false;
@@ -3292,7 +3293,8 @@ uint8_t WE_DDLCommandProc::updateSystablesTablename(ByteStream& bs, std::string&
 
 
     //It's the same string for each column, so we just need one dictionary struct
-    memset(&dictTuple, 0, sizeof(dictTuple));
+    void *dictTuplePtr = static_cast<void*>(&dictTuple);
+    memset(dictTuplePtr, 0, sizeof(dictTuple));
     dictTuple.sigValue = (unsigned char*)newTablename.c_str();
     dictTuple.sigSize = newTablename.length();
     dictTuple.isNull = false;
diff --git a/writeengine/server/we_dmlcommandproc.cpp b/writeengine/server/we_dmlcommandproc.cpp
index 5da10433e..2acdd1578 100644
--- a/writeengine/server/we_dmlcommandproc.cpp
+++ b/writeengine/server/we_dmlcommandproc.cpp
@@ -722,6 +722,10 @@ uint8_t WE_DMLCommandProc::processSingleInsert(messageqcpp::ByteStream& bs, std:
         }
     }
 
+    // MCOL-1495 Remove fCatalogMap entries CS won't use anymore.
+    CalpontSystemCatalog::removeCalpontSystemCatalog(sessionId);
+    CalpontSystemCatalog::removeCalpontSystemCatalog(sessionId | 0x80000000);
+
     return rc;
 }
 
@@ -1361,7 +1365,9 @@ uint8_t WE_DMLCommandProc::processBatchInsert(messageqcpp::ByteStream& bs, std::
         }
     }
 
-    //cout << "Batch insert return code " << rc << endl;
+    // MCOL-1495 Remove fCatalogMap entries CS won't use anymore.
+    CalpontSystemCatalog::removeCalpontSystemCatalog(sessionId);
+    CalpontSystemCatalog::removeCalpontSystemCatalog(sessionId | 0x80000000);
     return rc;
 }
 
@@ -2087,18 +2093,11 @@ uint8_t WE_DMLCommandProc::processBatchInsertBinary(messageqcpp::ByteStream& bs,
         args.add(cols);
         err = IDBErrorInfo::instance()->errorMsg(WARN_DATA_TRUNC, args);
 
-        // Strict mode enabled, so rollback on warning
-        // NOTE: This doesn't seem to be a possible code path yet
-        /*if (insertPkg.get_isWarnToError())
-        {
-        		string applName ("BatchInsert");
-        		fWEWrapper.bulkRollback(tblOid,txnid.id,tableName.toString(),
-        			applName, false, err);
-        		BulkRollbackMgr::deleteMetaFile( tblOid );
-        }*/
-    }
+   }
 
-    //cout << "Batch insert return code " << rc << endl;
+    // MCOL-1495 Remove fCatalogMap entries CS won't use anymore.
+    CalpontSystemCatalog::removeCalpontSystemCatalog(sessionId);
+    CalpontSystemCatalog::removeCalpontSystemCatalog(sessionId | 0x80000000);
     return rc;
 }
 
@@ -2240,6 +2239,9 @@ uint8_t WE_DMLCommandProc::commitBatchAutoOn(messageqcpp::ByteStream& bs, std::s
         fWEWrapper.getDictMap().erase(txnID);
     }
 
+    // MCOL-1495 Remove fCatalogMap entries CS won't use anymore.
+    CalpontSystemCatalog::removeCalpontSystemCatalog(sessionId);
+    CalpontSystemCatalog::removeCalpontSystemCatalog(sessionId | 0x80000000);
     return rc;
 }
 
@@ -2847,16 +2849,14 @@ uint8_t WE_DMLCommandProc::processUpdate(messageqcpp::ByteStream& bs,
                 convertToRelativeRid (rid, extentNum, blockNum);
                 rowIDLists.push_back(rid);
                 uint32_t colWidth = (colTypes[j].colWidth > 8 ? 8 : colTypes[j].colWidth);
-
-                // populate stats.blocksChanged
-                for (unsigned int k = 0; k < columnsUpdated.size(); k++)
+		int rrid = (int) relativeRID / (BYTE_PER_BLOCK / colWidth);
+                // populate stats.blocksChanged 
+		if (rrid > preBlkNums[j])
                 {
-                    if ((int)(relativeRID / (BYTE_PER_BLOCK / colWidth)) > preBlkNums[j])
-                    {
+			preBlkNums[j] = rrid ;
                         blocksChanged++;
-                        preBlkNums[j] = relativeRID / (BYTE_PER_BLOCK / colWidth);
-                    }
-                }
+		}
+
             }
 
             ridsFetched = true;
@@ -3778,7 +3778,6 @@ uint8_t WE_DMLCommandProc::processUpdate(messageqcpp::ByteStream& bs,
         err = IDBErrorInfo::instance()->errorMsg(WARN_DATA_TRUNC, args);
     }
 
-    //cout << "finished update" << endl;
     return rc;
 }
 
@@ -3961,6 +3960,10 @@ uint8_t WE_DMLCommandProc::processFlushFiles(messageqcpp::ByteStream& bs, std::s
     //if (idbdatafile::IDBPolicy::useHdfs())
     //		cacheutils::dropPrimProcFdCache();
     TableMetaData::removeTableMetaData(tableOid);
+
+    // MCOL-1495 Remove fCatalogMap entries CS won't use anymore.
+    CalpontSystemCatalog::removeCalpontSystemCatalog(txnId);
+    CalpontSystemCatalog::removeCalpontSystemCatalog(txnId | 0x80000000);
     return rc;
 }
 
@@ -4136,7 +4139,6 @@ uint8_t WE_DMLCommandProc::processDelete(messageqcpp::ByteStream& bs,
         }
     }
 
-    //cout << "WES return rc " << (int)rc << " with msg " << err << endl;
     return rc;
 }
 
diff --git a/writeengine/server/we_getfilesizes.cpp b/writeengine/server/we_getfilesizes.cpp
index 4a76bd598..5e408d4e5 100644
--- a/writeengine/server/we_getfilesizes.cpp
+++ b/writeengine/server/we_getfilesizes.cpp
@@ -269,8 +269,8 @@ int WE_GetFileSizes::processFileName(
     std::string& errMsg, int key)
 {
     uint8_t rc = 0;
-    off_t fileSize;
-    off_t compressedFileSize;
+    off_t fileSize = 0;
+    off_t compressedFileSize = 0;
     errMsg.clear();
 
     try
diff --git a/writeengine/shared/we_chunkmanager.cpp b/writeengine/shared/we_chunkmanager.cpp
index e2759d186..abe61ab11 100644
--- a/writeengine/shared/we_chunkmanager.cpp
+++ b/writeengine/shared/we_chunkmanager.cpp
@@ -1,4 +1,5 @@
 /* Copyright (C) 2014 InfiniDB, Inc.
+   Copyright (C) 2019 MariaDB Corporation.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -65,6 +66,8 @@ namespace WriteEngine
 extern int NUM_BLOCKS_PER_INITIAL_EXTENT; // defined in we_dctnry.cpp
 extern WErrorCodes ec;                    // defined in we_log.cpp
 
+const int COMPRESSED_CHUNK_SIZE = compress::IDBCompressInterface::maxCompressedSize(UNCOMPRESSED_CHUNK_SIZE) + 64 + 3 + 8 * 1024;
+
 //------------------------------------------------------------------------------
 // Search for the specified chunk in fChunkList.
 //------------------------------------------------------------------------------
@@ -1923,10 +1926,22 @@ int ChunkManager::reallocateChunks(CompFileData* fileData)
         struct tm ltm;
         localtime_r(reinterpret_cast<time_t*>(&tv.tv_sec), &ltm);
         char tmText[24];
+    // this snprintf call causes a compiler warning b/c buffer size is less
+    // then maximum string size.
+#if defined(__GNUC__) && __GNUC__ >= 6
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wformat-truncation="
         snprintf(tmText, sizeof(tmText), ".%04d%02d%02d%02d%02d%02d%06ld",
                  ltm.tm_year + 1900, ltm.tm_mon + 1,
                  ltm.tm_mday, ltm.tm_hour, ltm.tm_min,
                  ltm.tm_sec, tv.tv_usec);
+#pragma GCC diagnostic pop
+#else
+       snprintf(tmText, sizeof(tmText), ".%04d%02d%02d%02d%02d%02d%06ld",
+                 ltm.tm_year + 1900, ltm.tm_mon + 1,
+                 ltm.tm_mday, ltm.tm_hour, ltm.tm_min,
+                 ltm.tm_sec, tv.tv_usec);
+#endif
         string dbgFileName(rlcFileName + tmText);
 
         ostringstream oss;
@@ -2106,10 +2121,22 @@ int ChunkManager::reallocateChunks(CompFileData* fileData)
             struct tm ltm;
             localtime_r(reinterpret_cast<time_t*>(&tv.tv_sec), &ltm);
             char tmText[24];
+    // this snprintf call causes a compiler warning b/c buffer size is less
+    // then maximum string size.
+#if defined(__GNUC__) && __GNUC__ >= 6
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wformat-truncation="
             snprintf(tmText, sizeof(tmText), ".%04d%02d%02d%02d%02d%02d%06ld",
                      ltm.tm_year + 1900, ltm.tm_mon + 1,
                      ltm.tm_mday, ltm.tm_hour, ltm.tm_min,
                      ltm.tm_sec, tv.tv_usec);
+#pragma GCC diagnostic pop
+#else
+           snprintf(tmText, sizeof(tmText), ".%04d%02d%02d%02d%02d%02d%06ld",
+                     ltm.tm_year + 1900, ltm.tm_mon + 1,
+                     ltm.tm_mday, ltm.tm_hour, ltm.tm_min,
+                     ltm.tm_sec, tv.tv_usec);
+#endif
             string dbgFileName(rlcFileName + tmText);
 
             ostringstream oss;
diff --git a/writeengine/shared/we_chunkmanager.h b/writeengine/shared/we_chunkmanager.h
index 0d4d013d8..edf9b232f 100644
--- a/writeengine/shared/we_chunkmanager.h
+++ b/writeengine/shared/we_chunkmanager.h
@@ -68,7 +68,6 @@ const int UNCOMPRESSED_CHUNK_SIZE = compress::IDBCompressInterface::UNCOMPRESSED
 const int COMPRESSED_FILE_HEADER_UNIT = compress::IDBCompressInterface::HDR_BUF_LEN;
 
 // assume UNCOMPRESSED_CHUNK_SIZE > 0xBFFF (49151), 8 * 1024 bytes padding
-const int COMPRESSED_CHUNK_SIZE = compress::IDBCompressInterface::maxCompressedSize(UNCOMPRESSED_CHUNK_SIZE) + 64 + 3 + 8 * 1024;
 
 const int BLOCKS_IN_CHUNK = UNCOMPRESSED_CHUNK_SIZE / BYTE_PER_BLOCK;
 const int MAXOFFSET_PER_CHUNK = 511 * BYTE_PER_BLOCK;
diff --git a/writeengine/shared/we_fileop.cpp b/writeengine/shared/we_fileop.cpp
index 784f8b4d9..d25088f77 100644
--- a/writeengine/shared/we_fileop.cpp
+++ b/writeengine/shared/we_fileop.cpp
@@ -330,12 +330,15 @@ int FileOp::deleteFile( FID fid ) const
     std::vector<std::string> dbRootPathList;
     Config::getDBRootPathList( dbRootPathList );
 
+    int rc;
+
     for (unsigned i = 0; i < dbRootPathList.size(); i++)
     {
         char rootOidDirName[FILE_NAME_SIZE];
-        sprintf(rootOidDirName, "%s/%s", dbRootPathList[i].c_str(), oidDirName);
+        rc = snprintf(rootOidDirName, FILE_NAME_SIZE, "%s/%s",
+            dbRootPathList[i].c_str(), oidDirName);
 
-        if ( IDBPolicy::remove( rootOidDirName ) != 0 )
+        if ( rc == FILE_NAME_SIZE || IDBPolicy::remove( rootOidDirName ) != 0 )
         {
             ostringstream oss;
             oss << "Unable to remove " << rootOidDirName;
@@ -363,6 +366,7 @@ int FileOp::deleteFiles( const std::vector<int32_t>& fids ) const
     char dbDir       [MAX_DB_DIR_LEVEL][MAX_DB_DIR_NAME_SIZE];
     std::vector<std::string> dbRootPathList;
     Config::getDBRootPathList( dbRootPathList );
+    int rc;
 
     for ( unsigned n = 0; n < fids.size(); n++ )
     {
@@ -376,10 +380,10 @@ int FileOp::deleteFiles( const std::vector<int32_t>& fids ) const
         for (unsigned i = 0; i < dbRootPathList.size(); i++)
         {
             char rootOidDirName[FILE_NAME_SIZE];
-            sprintf(rootOidDirName, "%s/%s", dbRootPathList[i].c_str(),
+            rc = snprintf(rootOidDirName, FILE_NAME_SIZE, "%s/%s", dbRootPathList[i].c_str(),
                     oidDirName);
 
-            if ( IDBPolicy::remove( rootOidDirName ) != 0 )
+            if ( rc == FILE_NAME_SIZE || IDBPolicy::remove( rootOidDirName ) != 0 )
             {
                 ostringstream oss;
                 oss << "Unable to remove " << rootOidDirName;
@@ -410,6 +414,7 @@ int FileOp::deletePartitions( const std::vector<OID>& fids,
     char dbDir       [MAX_DB_DIR_LEVEL][MAX_DB_DIR_NAME_SIZE];
     char rootOidDirName[FILE_NAME_SIZE];
     char partitionDirName[FILE_NAME_SIZE];
+    int rcd, rcp;
 
     for (uint32_t i = 0; i < partitions.size(); i++)
     {
@@ -420,12 +425,13 @@ int FileOp::deletePartitions( const std::vector<OID>& fids,
                 dbDir[0], dbDir[1], dbDir[2], dbDir[3], dbDir[4]);
         // config expects dbroot starting from 0
         std::string rt( Config::getDBRootByNum(partitions[i].lp.dbroot) );
-        sprintf(rootOidDirName, "%s/%s",
+        rcd = snprintf(rootOidDirName, FILE_NAME_SIZE, "%s/%s",
                 rt.c_str(), tempFileName);
-        sprintf(partitionDirName, "%s/%s",
+        rcp = snprintf(partitionDirName, FILE_NAME_SIZE, "%s/%s",
                 rt.c_str(), oidDirName);
 
-        if ( IDBPolicy::remove( rootOidDirName ) != 0 )
+        if ( rcd == FILE_NAME_SIZE || rcp == FILE_NAME_SIZE
+            || IDBPolicy::remove( rootOidDirName ) != 0 )
         {
             ostringstream oss;
             oss << "Unable to remove " << rootOidDirName;
diff --git a/writeengine/shared/we_index.h b/writeengine/shared/we_index.h
index d5438453d..bcd88e5e9 100644
--- a/writeengine/shared/we_index.h
+++ b/writeengine/shared/we_index.h
@@ -393,7 +393,7 @@ struct IdxMultiColKey
         curMask.reset();
         curLevel = maxLevel = 0;
         totalBit = 0;
-        memset( testbitArray, 0, IDX_MAX_MULTI_COL_IDX_LEVEL);
+        memset( testbitArray, 0, IDX_MAX_MULTI_COL_IDX_LEVEL * sizeof(testbitArray[0]));
         memset( keyBuf, 0, IDX_MAX_MULTI_COL_BIT / 8 );
         curMask = 0x1F;
         curMask = curMask << (IDX_MAX_MULTI_COL_BIT - 5);
diff --git a/writeengine/shared/we_type.h b/writeengine/shared/we_type.h
index 8a8cae5a9..8604b2169 100644
--- a/writeengine/shared/we_type.h
+++ b/writeengine/shared/we_type.h
@@ -489,7 +489,7 @@ struct CacheControl                     /** @brief Cache control structure */
     int            checkInterval;       /** @brief A check point interval in seconds */
     CacheControl()
     {
-        totalBlock = pctFree = checkInterval;    /** @brief constructor */
+        totalBlock = pctFree = checkInterval = 0;    /** @brief constructor */
     }
 };
 
diff --git a/writeengine/splitter/we_filereadthread.cpp b/writeengine/splitter/we_filereadthread.cpp
index 6840d377d..e455ff518 100644
--- a/writeengine/splitter/we_filereadthread.cpp
+++ b/writeengine/splitter/we_filereadthread.cpp
@@ -356,7 +356,7 @@ unsigned int WEFileReadThread::readDataFile(messageqcpp::SBS& Sbs)
         //char aBuff[1024*1024];			// TODO May have to change it later
         //char*pStart = aBuff;
         unsigned int aIdx = 0;
-        unsigned int aLen = 0;
+        int aLen = 0;
         *Sbs << (ByteStream::byte)(WE_CLT_SRV_DATA);
 
         while ((!fInFile.eof()) && (aIdx < getBatchQty()))
diff --git a/writeengine/splitter/we_splitterapp.cpp b/writeengine/splitter/we_splitterapp.cpp
index 1b62c6bcd..f96da7463 100644
--- a/writeengine/splitter/we_splitterapp.cpp
+++ b/writeengine/splitter/we_splitterapp.cpp
@@ -1,4 +1,5 @@
 /* Copyright (C) 2014 InfiniDB, Inc.
+   Copyright (C) 2019 MariaDB Corporation.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -604,7 +605,13 @@ void WESplitterApp::updateWithJobFile(int aIdx)
 int main(int argc, char** argv)
 {
     std::string err;
-    setuid(0);		//@BUG 4343 set effective userid to root.
+    // Why do we need this if we don't care about f()'s rc ?
+    // @BUG4343
+    if( setuid( 0 ) < 0 )
+    {
+        std::cerr << " we_splitterapp: setuid failed " << std::endl;
+    }
+
     std::cin.sync_with_stdio(false);
 
     try
diff --git a/writeengine/wrapper/we_colop.cpp b/writeengine/wrapper/we_colop.cpp
index 1359570e5..00fc25cc8 100644
--- a/writeengine/wrapper/we_colop.cpp
+++ b/writeengine/wrapper/we_colop.cpp
@@ -239,7 +239,8 @@ int ColumnOp::allocRowId(const TxnID& txnid, bool useStartingExtent,
 
                     for (i = 0; i < dbRootExtentTrackers.size(); i++)
                     {
-                        if (i != column.colNo)
+                        uint32_t colNo = column.colNo;
+                        if (i != colNo)
                             dbRootExtentTrackers[i]->nextSegFile(dbRoot, partition, segment, newHwm, startLbid);
 
                         // Round up HWM to the end of the current extent
diff --git a/writeengine/xml/we_xmlgenproc.cpp b/writeengine/xml/we_xmlgenproc.cpp
index e1763bdb1..5789dca15 100644
--- a/writeengine/xml/we_xmlgenproc.cpp
+++ b/writeengine/xml/we_xmlgenproc.cpp
@@ -38,9 +38,9 @@ namespace
 {
 const char*  DICT_TYPE("D");
 const char*  ENCODING("UTF-8");
-const char*  JOBNAME("Job_");
 const char*  LOGNAME("Jobxml_");
 const std::string LOGDIR("/log/");
+const char*  JOBNAME("Job_");
 }
 
 namespace WriteEngine
@@ -438,10 +438,11 @@ void XMLGenProc::getColumnsForTable(
         throw std::runtime_error( oss.str() );
     }
 }
-
+
 //------------------------------------------------------------------------------
 // Generate Job XML File Name
 //------------------------------------------------------------------------------
+
 std::string XMLGenProc::genJobXMLFileName( ) const
 {
     std::string xmlFileName;
@@ -465,7 +466,10 @@ std::string XMLGenProc::genJobXMLFileName( ) const
     if (!p.has_root_path())
     {
         char cwdPath[4096];
-        getcwd(cwdPath, sizeof(cwdPath));
+        char *buf;
+        buf = getcwd(cwdPath, sizeof(cwdPath));
+        if (buf == NULL)
+            throw std::runtime_error("Failed to get the current working directory!");
         boost::filesystem::path p2(cwdPath);
         p2 /= p;
         xmlFileName = p2.string();
@@ -479,7 +483,7 @@ std::string XMLGenProc::genJobXMLFileName( ) const
 
     return xmlFileName;
 }
-
+
 //------------------------------------------------------------------------------
 // writeXMLFile
 //------------------------------------------------------------------------------
diff --git a/writeengine/xml/we_xmljob.cpp b/writeengine/xml/we_xmljob.cpp
index 4dd923172..5afbe8774 100644
--- a/writeengine/xml/we_xmljob.cpp
+++ b/writeengine/xml/we_xmljob.cpp
@@ -1313,7 +1313,13 @@ int XMLJob::genJobXMLFileName(
             // nothing else to do
 #else
             char cwdPath[4096];
-            getcwd(cwdPath, sizeof(cwdPath));
+            char *err;
+            err = getcwd(cwdPath, sizeof(cwdPath));
+            if (err == NULL)
+            {
+                errMsg = "Failed to get the current working directory.";
+                return -1;
+            }
             string trailingPath(xmlFilePath.string());
             xmlFilePath  = cwdPath;
             xmlFilePath /= trailingPath;