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