Fix the gcov/lcov related issues

Summary:

Jenkin reports errors that:

* Linking error on some machines. The error message shows it cannot find some gcov related symbols.
* lcov error due to the version issues.

Test Plan:

run make in different platforms

Reviewers:

CC:

Task ID: #

Blame Rev:

Makefile

@@ -122,7 +122,7 @@ release:
 
 coverage:
 	$(MAKE) clean
-	COVERAGEFLAGS="-fprofile-arcs -ftest-coverage" $(MAKE) all check
+	COVERAGEFLAGS="-fprofile-arcs -ftest-coverage" LDFLAGS+="-lgcov" $(MAKE) all check
 	(cd coverage; ./coverage_test.sh)
 	# Delete intermediate files
 	find . -type f -regex ".*\.\(\(gcda\)\|\(gcno\)\)" | xargs --no-run-if-empty rm

coverage/coverage_test.sh

@@ -55,12 +55,19 @@ then
   exit 0
 fi
 
+LCOV_VERSION=$(lcov -v | grep 1.1 || true)
+if [ $LCOV_VERSION ]
+then
+  echo "Not supported lcov version. Expect lcov 1.1."
+  exit 0
+fi
+
 (cd $ROOT; lcov --no-external \
      --capture  \
      --directory $PWD \
      --gcov-tool $GCOV \
-     --output-file $COVERAGE_DIR/coverage.info &>/dev/null)
+     --output-file $COVERAGE_DIR/coverage.info)
 
-genhtml $COVERAGE_DIR/coverage.info -o $COVERAGE_DIR &>/dev/null
+genhtml $COVERAGE_DIR/coverage.info -o $COVERAGE_DIR
 
 echo "HTML Coverage report is generated in $COVERAGE_DIR"