GCC_VER=$(shell $(PRE)$(CC) -dumpversion)
UNAME_S=$(shell uname -s)
ifeq ($(UNAME_S),Linux)
  OS=Linux
endif
ARCH?=$(shell arch)
ifeq ($(ARCH),x86_64)
  CPU=x86-64
  BIT=64
  BIT_OPT=-m64
  LOW_ASM_SRC=src/asm/low_x86-64.asm
  ASM=nasm -felf64
endif
ifeq ($(ARCH),x86)
  CPU=x86
  BIT=32
  BIT_OPT=-m32
  LOW_ASM_SRC=src/asm/low_x86.asm
endif
ifeq ($(ARCH),armv71)
  CPU=armv71
  BIT=32
  LOW_ASM_SRC=src/asm/low_arm.s
endif
ifneq ($(UNAME_S),Darwin)
  LDFLAGS+=-lrt
endif

CP=cp -f
AR=ar r
MKDIR=mkdir -p
RM=rm -rf

ifeq ($(DEBUG),1)
  CFLAGS+=-fsanitize=address
  LDFLAGS+=-fsanitize=address
else
  CFLAGS_OPT+=-fomit-frame-pointer -DNDEBUG
  ifeq ($(CXX),clang++)
    CFLAGS_OPT+=-O3
  else
    ifeq ($(shell expr $(GCC_VER) \> 4.6.0),1)
      CFLAGS_OPT+=-Ofast
    else
      CFLAGS_OPT+=-O3
    endif
  endif
  ifeq ($(MARCH),)
    ifeq (x86,$(findstring x86,$(CPU)))
      CFLAGS_OPT+=-march=native
    endif
  else
    CFLAGS_OPT+=$(MARCH)
  endif
endif
CFLAGS_WARN=-Wall -Wextra -Wformat=2 -Wcast-qual -Wcast-align -Wwrite-strings -Wfloat-equal -Wpointer-arith
CFLAGS+=-g3
INC_OPT=-I include -I test -I ../xbyak -I ../cybozulib/include
CFLAGS+=$(CFLAGS_WARN) $(BIT_OPT) $(INC_OPT) $(CFLAGS_USER)
DEBUG=0
ifeq ($(DEBUG),0)
CFLAGS+=$(CFLAGS_OPT)
endif
LDFLAGS+=-lgmp -lgmpxx -lcrypto $(BIT_OPT) $(LDFLAGS_USER)

CFLAGS+=-fPIC