CCFLAGS  = -Wall -Wextra -Werror -O3 -march=native -I../include -ggdb -fpic -D_FILE_OFFSET_BITS=64
# CCFLAGS  = -Wall -Wextra -Werror -O0 -I../include -ggdb -fpic -D_FILE_OFFSET_BITS=64
CFLAGS   = $(CCFLAGS) -std=c99
CXXFLAGS = $(CCFLAGS) -std=c++11 -Wold-style-cast