Compilation on Apple Silicon

[YS-McGee]

I've solved two main issues when running the code on my macbook m1, after installing ntl and gmp with brew:

1. rdtsc() is for x86 architecture. Add #include <chrono> and replace srand(rdtsc()); with the following: unsigned seed = std::chrono::system_clock::now().time_since_epoch().count(); srand(seed);
2. The following makefile works on my machine:

PREFIX=$(HOME)
CC=g++
AR=ar

# Case 1: These are the standard compilation flags CCFLAGS and linker flags LDFLAGS.
# CCFLAGS= -Wall -std=gnu++0x -Ofast 
# LDFLAGS= -lntl -lgmp

# Case 2: If NTL is installed in a specific location, say /path/to/ntl, you must specify it by using the CCFLAGS and LDFLAGS below instead.
# CCFLAGS= -Wall -I/opt/homebrew/include/ -std=gnu++0x -Ofast 
# LDFLAGS= -L/opt/homebrew/lib/ -lntl -lgmp

# Case 3: In some cases, Unix doesn't find NTL even if it is installed in the standard location /usr/local. Then, uncomment the following lines.
CCFLAGS= -Wall -I/opt/homebrew/include/ -std=gnu++0x -Ofast 
LDFLAGS= -L/opt/homebrew/lib/ -lntl -lgmp 

SRCS=$(wildcard *.cc)
OBJS=$(SRCS:.cc=.o)

.PHONY: all clean mrproper

all: IBE

IBE: $(OBJS)
	$(CC) $(CCFLAGS) -o IBE $(OBJS) $(LDFLAGS)

%.o: %.cc params.h
	$(CC) $(CCFLAGS) -c $< 

clean:
	rm -f *.o

mrproper:
	rm -f IBE