Minor changes to fix compilation errors when compiled w/ g++ 7.3 (Ubuntu 18.04)

This is part of my effort to port RAMCloud to run on CloudLab r320 machines, which have Infiniband 56Gbps HCA's.

Author: yilongli

apps/ClusterPerf.cc

@@ -56,6 +56,10 @@ namespace po = boost::program_options;
 #include "Transaction.h"
 #include "Util.h"
 
+#if __GNUC__ && (__GNUC__ >= 7)
+#pragma GCC diagnostic ignored "-Wformat-truncation"
+#endif
+
 using namespace RAMCloud;
 
 // Shared state for client library.
@@ -7540,3 +7544,7 @@ catch (std::exception& e) {
  Logger::get().sync();
  exit(1);
 }
+
+#if __GNUC__ && (__GNUC__ >= 7)
+#pragma GCC diagnostic warning "-Wformat-truncation"
+#endif

src/HashTableTest.cc

@@ -323,7 +323,9 @@ class HashTableTest : public ::testing::Test {
  // fill in the "log" entries
  for (uint64_t i = 0; i < numEnt; i++) {
  string stringKey = format("%lu", i);
+#pragma GCC diagnostic ignored "-Waligned-new=all"
  values.push_back(new TestObject(tableId, stringKey));
+#pragma GCC diagnostic warning "-Waligned-new=all"
  Key key(values[i]->tableId,
  values[i]->stringKeyPtr,
  values[i]->stringKeyLength);

src/MockTransport.h

@@ -13,8 +13,9 @@
  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+#pragma GCC diagnostic ignored "-Wconversion"
 #include <gtest/gtest.h>
-
+#pragma GCC diagnostic warning "-Wconversion"
 #include <queue>
 
 #include "ServiceLocator.h"

src/TestRunner.cc

@@ -13,7 +13,6 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#include <gtest/gtest.h>
 #include <boost/program_options.hpp>
 
 #include "TestUtil.h"

src/TestUtil.h

@@ -21,7 +21,9 @@
 #ifndef RAMCLOUD_TESTUTIL_H
 #define RAMCLOUD_TESTUTIL_H
 
+#pragma GCC diagnostic ignored "-Wconversion"
 #include <gtest/gtest.h>
+#pragma GCC diagnostic warning "-Wconversion"
 #include <regex.h>
 #include <sstream>
 

src/TimeTrace.h

@@ -200,7 +200,9 @@ class TimeTrace {
  template<typename... Args>
  inline void record(uint64_t timestamp, const char* format, Args... args)
  {
+#pragma GCC diagnostic ignored "-Wnarrowing"
  uint32_t eventArgs[] = {args...};
+#pragma GCC diagnostic warning "-Wnarrowing"
  if (expect_true(TimeTrace::activeReaders == 0)) {
  Event* event = &events[nextIndex];
  nextIndex = (nextIndex + 1) & BUFFER_MASK;