#
# Makefile for ZeroTier One on Linux
#
# This is confirmed to work on distributions newer than CentOS 6 (the
# one used for reference builds) and on 32 and 64 bit x86 and ARM
# machines. It should also work on other 'normal' machines and recent
# distributions. Editing might be required for tiny devices or weird
# distros.
#
# Targets
#   one: zerotier-one and symlinks (cli and idtool)
#   doc: builds manpages, requires rst2man somewhere in PATH
#   all: builds 'one'
#   selftest: zerotier-selftest
#   debug: builds 'one' and 'selftest' with tracing and debug flags
#   installer: builds installers and packages (RPM/DEB/etc.) if possible
#   official: cleans and then builds 'one', 'installer', and 'doc'
#   clean: removes all built files, objects, other trash
#

GENERATED_FILES :=
DOC_DIR = doc

# Automagically pick clang or gcc, with preference for clang
# This is only done if we have not overridden these with an environment or CLI variable
ifeq ($(origin CC),default)
	CC=$(shell if [ -e /usr/bin/clang ]; then echo clang; else echo gcc; fi)
endif
ifeq ($(origin CXX),default)
	CXX=$(shell if [ -e /usr/bin/clang++ ]; then echo clang++; else echo g++; fi)
endif

#UNAME_M=$(shell $(CC) -dumpmachine | cut -d '-' -f 1)

INCLUDES?=
DEFS?=
LDLIBS?=

include objects.mk

ifeq ($(ZT_DEBUG),1)
	DEFS+=-DZT_TRACE
	CFLAGS+=-Wall -g -pthread $(INCLUDES) $(DEFS)
	CXXFLAGS+=-Wall -g -pthread $(INCLUDES) $(DEFS)
	LDFLAGS=-ldl
	STRIP?=echo
	# The following line enables optimization for the crypto code, since
	# C25519 in particular is almost UNUSABLE in -O0 even on a 3ghz box!
ext/lz4/lz4.o node/Salsa20.o node/SHA512.o node/C25519.o node/Poly1305.o: CFLAGS = -Wall -O2 -g -pthread $(INCLUDES) $(DEFS)
else
	CFLAGS?=-O3 -fstack-protector
	CFLAGS+=-Wall -fPIE -fvisibility=hidden -pthread $(INCLUDES) -DNDEBUG $(DEFS)
	CXXFLAGS?=-O3 -fstack-protector
	CXXFLAGS+=-Wall -Wreorder -fPIE -fvisibility=hidden -fno-rtti -pthread $(INCLUDES) -DNDEBUG $(DEFS)
	LDFLAGS=-ldl -pie -Wl,-z,relro,-z,now
	STRIP?=strip
	STRIP+=--strip-all
endif

ifeq ($(ZT_TRACE),1)
	DEFS+=-DZT_TRACE
endif

# Debug output for Network Containers
# Specific levels can be controlled in netcon/common.inc.c
ifeq ($(SDK_DEBUG),1)
	DEFS+=-DSDK_DEBUG
endif

# Uncomment for gprof profile build
#CFLAGS=-Wall -g -pg -pthread $(INCLUDES) $(DEFS)
#CXXFLAGS=-Wall -g -pg -pthread $(INCLUDES) $(DEFS)
#LDFLAGS=
#STRIP=echo

all: shared_lib check

linux_shared_lib: $(OBJS)
	rm -f *.o
	$(CXX) $(CXXFLAGS) $(LDFLAGS) $(DEFS) -DZT_SDK -DZT_ONE_NO_ROOT_CHECK -Iext/lwip/src/include -Iext/lwip/src/include/ipv4 -Iext/lwip/src/include/ipv6 -Izerotierone/osdep -Izerotierone/node -Isrc -o build/zerotier-sdk-service $(OBJS) zerotierone/service/OneService.cpp src/SDK_EthernetTap.cpp src/SDK_Proxy.cpp zerotierone/one.cpp -x c src/SDK_RPC.c $(LDLIBS) -ldl
	# Build liblwip.so which must be placed in ZT home for zerotier-netcon-service to work
	make -f make-liblwip.mk
	# Use gcc not clang to build standalone intercept library since gcc is typically used for libc and we want to ensure maximal ABI compatibility
	cd src ; gcc $(DEFS) -g -O2 -Wall -std=c99 -fPIC -DVERBOSE -D_GNU_SOURCE -DSDK_INTERCEPT -I. -I../zerotierone/node -nostdlib -shared -o libztintercept.so SDK_Sockets.c SDK_Intercept.c SDK_Debug.c SDK_RPC.c -ldl
	mkdir -p build/linux_shared_lib
	cp src/libztintercept.so build/linux_shared_lib/libztintercept.so
	ln -sf zerotier-sdk-service zerotier-cli
	ln -sf zerotier-sdk-service zerotier-idtool

check:
		./check.sh build/lwip/liblwip.so
		./check.sh build/linux_shared_lib/libztintercept.so

clean:
	rm -rf ${GENERATED_FILES}
	rm -rf zerotier-cli zerotier-idtool
	rm -rf build/*
	find . -type f -name '*.a' -delete
	find . -type f -name '*.o' -delete
	find . -type f -name '*.so' -delete
	find . -type f -name '*.o.d' -delete
	# Remove junk generated by Android builds
	cd integrations/Android/proj; ./gradlew clean
	rm -rf integrations/Android/proj/.gradle
	rm -rf integrations/Android/proj/.idea
	rm -rf integrations/Android/proj/build