fix bench warning and flags for gcc 4.8.1

bench-comparison/Makefile

@@ -1,6 +1,5 @@
 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
 
 

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;