fix bench warning and flags for gcc 4.8.1

bench-comparison/Makefile

 CXX	= g++
-CXXFLAGS	= -march=native -Wall  -pthread  -I../include --std=c++11
-
+CXXFLAGS	= -march=native -Wall -Wextra -Wshadow -pedantic -std=c++11 -pthread -Wl,--no-as-needed  -I../include 
 CXX_RELEASE_FLAGS = -O3 -flto
 
 
@@ -10,7 +9,7 @@ spdlog-bench: spdlog-bench.cpp
 	$(CXX) spdlog-bench.cpp -o spdlog-bench $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
 	
 spdlog-bench-mt: spdlog-bench-mt.cpp
-	$(CXX) spdlog-bench-mt.cpp -o spdlog-bench-mt $(CXXFLAGS) $(CXX_RELEASE_FLAGS)	
+	$(CXX) spdlog-bench-mt.cpp -o spdlog-bench-mt  $(CXXFLAGS) $(CXX_RELEASE_FLAGS)	
 
 BOOST_FLAGS	= -DBOOST_LOG_DYN_LINK  -I/home/gabi/devel/boost_1_56_0/ -L/home/gabi/devel/boost_1_56_0/stage/lib -lboost_log  -lboost_log_setup -lboost_filesystem -lboost_system -lboost_thread -lboost_regex -lboost_date_time -lboost_chrono	
 

bench-comparison/boost-bench.cpp

@@ -30,7 +30,7 @@ void init()
 }
 
 
-int main(int argc, char* argv[])
+int main(int argc, char* [])
 {
 	int howmany = 1000000;
     init();

bench-comparison/spdlog-bench.cpp

@@ -2,7 +2,7 @@
 #include "spdlog/spdlog.h"
 
 
-int main(int argc, char* argv[])
+int main(int argc, char* [])
 {
 	int howmany = 1000000;
 	namespace spd = spdlog;