Pass -dead_strip -dead_strip_dylibs -bind_at_load on macOS

Makefile.osx

@@ -2,6 +2,9 @@ CXX = clang++
 CXXFLAGS := ${CXX_DEBUG} -Wall -std=c++11 -DMAC_OSX
 INCFLAGS = -I/usr/local/include
 LDFLAGS := -Wl,-rpath,/usr/local/lib -L/usr/local/lib
+LDFLAGS += -Wl,-dead_strip
+LDFLAGS += -Wl,-dead_strip_dylibs
+LDFLAGS += -Wl,-bind_at_load
 
 ifeq ($(USE_STATIC),yes)
 	LDLIBS = -lz /usr/local/lib/libcrypto.a /usr/local/lib/libssl.a /usr/local/lib/libboost_system.a /usr/local/lib/libboost_date_time.a /usr/local/lib/libboost_filesystem.a /usr/local/lib/libboost_program_options.a -lpthread