File: Makefile.linux

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libntru 0.5-2
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CC?=gcc
AS=$(CC) -c
AR?=ar

CFLAGS?=-g
CFLAGS+=-Wall -Wextra -Wno-unused-parameter
SSSE3_FLAG = $(shell /bin/grep -m 1 -o ssse3 /proc/cpuinfo)
ifneq ($(SSE), no)
    ifeq ($(SSSE3_FLAG), ssse3)
        SSE=yes
    endif
endif
AVX2_FLAG = $(shell /bin/grep -m 1 -o avx2 /proc/cpuinfo)
ifneq ($(AVX2), no)
    ifeq ($(AVX2_FLAG), avx2)
        AVX2=yes
    endif
endif
ifeq ($(AVX2), yes)
    SSE=yes
endif
ifeq ($(SSE), no)
    AVX2=no
endif
ifeq ($(SSE), yes)
    CFLAGS+=-mssse3
endif
ifeq ($(AVX2), yes)
    CFLAGS+=-mavx2
endif

# use -march=native if we're compiling for x86
BENCH_ARCH_OPTION=
MACHINE=$(shell uname -m | sed 's/i.86/i386/g')
ifeq ($(SSE), yes)
    ifeq ($(MACHINE), i386)
        BENCH_ARCH_OPTION=-march=native
    endif
    ifeq ($(MACHINE), x86_64)
        BENCH_ARCH_OPTION=-march=native
    endif
endif
OPTFLAGS=-O2
bench: OPTFLAGS=-O3 $(BENCH_ARCH_OPTION)
CFLAGS+=$(OPTFLAGS)

LIBS+=-lrt
SRCDIR=src
TESTDIR=tests
LIB_OBJS=bitstring.o encparams.o hash.o idxgen.o key.o mgf.o ntru.o poly.o rand.o arith.o sha1.o sha2.o nist_ctr_drbg.o rijndael.o
ifeq ($(SSE), yes)
    ifeq ($(MACHINE), x86_64)
        LIB_OBJS+=sha1-mb-x86_64.o sha256-mb-x86_64.o
    endif
endif
TEST_OBJS=test_bitstring.o test_hash.o test_idxgen.o test_key.o test_ntru.o test.o test_poly.o test_util.o
VERSION=0.5
INST_PFX=/usr
DEB_HOST_MULTIARCH ?= $(shell dpkg-architecture -qDEB_HOST_MULTIARCH)
INST_LIBDIR=$(INST_PFX)/lib/$(DEB_HOST_MULTIARCH)
INST_INCLUDE=$(INST_PFX)/include/libntru
INST_DOCDIR=$(INST_PFX)/share/doc/libntru-$(VERSION)
INST_HEADERS=ntru.h types.h key.h encparams.h hash.h rand.h err.h
PERL=/usr/bin/perl
PERLASM_SCHEME=elf

LIB_OBJS_PATHS=$(patsubst %,$(SRCDIR)/%,$(LIB_OBJS))
TEST_OBJS_PATHS=$(patsubst %,$(TESTDIR)/%,$(TEST_OBJS))
DIST_NAME=libntru-$(VERSION)
MAKEFILENAME=$(lastword $(MAKEFILE_LIST))

.PHONY: all lib install uninstall dist test clean distclean

all: lib

lib: libntru.so

static-lib: libntru.a

libntru.so: $(LIB_OBJS_PATHS)
	$(CC) $(CFLAGS) $(CPPFLAGS) -shared -Wl,-soname,libntru-$(VERSION).so -o libntru-$(VERSION).so $(LIB_OBJS_PATHS) $(LDFLAGS) $(LIBS)

libntru.a: $(LIB_OBJS_PATHS)
	$(AR) cru libntru.a $(LIB_OBJS_PATHS)

install: install-lib install-doc install-headers

install-lib: lib
	test -d "$(DESTDIR)$(INST_LIBDIR)" || mkdir -p "$(DESTDIR)$(INST_LIBDIR)"
	install -m 0755 libntru-$(VERSION).so "$(DESTDIR)$(INST_LIBDIR)/libntru-$(VERSION).so"

install-static-lib: static-lib
	test -d "$(DESTDIR)$(INST_LIBDIR)" || mkdir -p "$(DESTDIR)$(INST_LIBDIR)"
	install -m 0755 libntru.a "$(DESTDIR)$(INST_LIBDIR)/libntru.a"

install-doc:
	test -d "$(DESTDIR)$(INST_DOCDIR)" || mkdir -p "$(DESTDIR)$(INST_DOCDIR)"
	install -m 0644 README.md "$(DESTDIR)$(INST_DOCDIR)/README.md"

install-headers:
	test -d "$(DESTDIR)$(INST_INCLUDE)" || mkdir -p "$(DESTDIR)$(INST_INCLUDE)"
	for header in $(INST_HEADERS) ; do \
	    install -m 0644 "$(SRCDIR)/$$header" "$(DESTDIR)$(INST_INCLUDE)/" ; \
	done

uninstall: uninstall-lib uninstall-doc uninstall-headers

uninstall-lib:
	rm -f "$(DESTDIR)$(INST_LIBDIR)/libntru.so"

uninstall-static-lib:
	rm -f "$(DESTDIR)$(INST_LIBDIR)/libntru.a"

uninstall-doc:
	rm -f "$(DESTDIR)$(INST_DOCDIR)/README.md"
	rmdir "$(DESTDIR)$(INST_DOCDIR)/"

uninstall-headers:
	for header in $(INST_HEADERS) ; do \
	    rm "$(DESTDIR)$(INST_INCLUDE)/$$header" ; \
	done
	rmdir "$(DESTDIR)$(INST_INCLUDE)/"

dist:
	rm -rf $(DIST_NAME)
	mkdir $(DIST_NAME)
	mkdir $(DIST_NAME)/$(SRCDIR)
	mkdir $(DIST_NAME)/$(TESTDIR)
	cp Makefile Makefile.win Makefile.osx README.md LICENSE PATENTS $(DIST_NAME)
	cp $(SRCDIR)/*.c $(DIST_NAME)/$(SRCDIR)
	cp $(SRCDIR)/*.h $(DIST_NAME)/$(SRCDIR)
	cp $(TESTDIR)/*.c $(DIST_NAME)/$(TESTDIR)
	cp $(TESTDIR)/*.h $(DIST_NAME)/$(TESTDIR)
	tar cf $(DIST_NAME).tar.xz $(DIST_NAME) --lzma
	rm -rf $(DIST_NAME)

test:
	$(MAKE) -f $(MAKEFILENAME) testnoham
	@echo
	@echo Testing patent-reduced build
	LD_LIBRARY_PATH=. ./testnoham
	$(MAKE) -f $(MAKEFILENAME) testham
	@echo
	@echo Testing full build
	LD_LIBRARY_PATH=. ./testham

testham: clean lib $(TEST_OBJS_PATHS)
	@echo CFLAGS=$(CFLAGS)
	$(CC) $(CFLAGS) -o testham $(TEST_OBJS_PATHS) -L. -lntru-$(VERSION) -lm

testnoham: CFLAGS += -DNTRU_AVOID_HAMMING_WT_PATENT
testnoham: clean lib $(TEST_OBJS_PATHS)
	@echo CFLAGS=$(CFLAGS)
	$(CC) $(CFLAGS) -o testnoham $(TEST_OBJS_PATHS) -L. -lntru-$(VERSION) -lm

bench: static-lib
	$(CC) $(CFLAGS) $(CPPFLAGS) -o bench $(SRCDIR)/bench.c $(LDFLAGS) $(LIBS) -L. -lntru-$(VERSION)

hybrid: static-lib
	$(CC) $(CFLAGS) $(CPPFLAGS) -o hybrid $(SRCDIR)/hybrid.c $(LDFLAGS) $(LIBS) -L. -lntru-$(VERSION) -lcrypto

$(SRCDIR)/%.o: $(SRCDIR)/%.c
	$(CC) $(CFLAGS) $(CPPFLAGS) -c -fPIC $< -o $@

$(SRCDIR)/sha1-mb-x86_64.s: $(SRCDIR)/sha1-mb-x86_64.pl; CC=$(CC) ASM="$(AS)" $(PERL) $(SRCDIR)/sha1-mb-x86_64.pl $(PERLASM_SCHEME) > $@
$(SRCDIR)/sha1-mb-x86_64.o: $(SRCDIR)/sha1-mb-x86_64.s
	$(AS) $(SRCDIR)/sha1-mb-x86_64.s -o $@
$(SRCDIR)/sha256-mb-x86_64.s: $(SRCDIR)/sha256-mb-x86_64.pl; CC=$(CC) ASM="$(AS)" $(PERL) $(SRCDIR)/sha256-mb-x86_64.pl $(PERLASM_SCHEME) > $@
$(SRCDIR)/sha256-mb-x86_64.o: $(SRCDIR)/sha256-mb-x86_64.s
	$(AS) $(SRCDIR)/sha256-mb-x86_64.s -o $@

tests/%.o: tests/%.c
	$(CC) $(CFLAGS) $(CPPFLAGS) -fPIC -I$(SRCDIR) -c $< -o $@

clean:
	@# also clean files generated on other OSes
	rm -f $(SRCDIR)/*.o $(SRCDIR)/*.s $(TESTDIR)/*.o libntru.so libntru.a libntru.dylib libntru.dll testham testnoham testham.exe testnoham.exe bench bench.exe hybrid hybrid.exe

distclean: clean
	rm -rf $(DIST_NAME)
	rm -f $(DIST_NAME).tar.xz $(DIST_NAME).zip