native/org.eclipse.cdt.native.serial/jni/Makefile

#*******************************************************************************
# Copyright (c) 2002, 2019 QNX Software Systems and others.
#
# This program and the accompanying materials
# are made available under the terms of the Eclipse Public License 2.0
# which accompanies this distribution, and is available at
# https://www.eclipse.org/legal/epl-2.0/
#
# SPDX-License-Identifier: EPL-2.0
#
# Contributors:
#     QNX Software Systems - initial API and implementation
#     Alex Blewitt - MacOSX with a 64-bit vm 
#*******************************************************************************/

ifeq ($(JAVA_HOME),)
$(error Please define JAVA_HOME)
endif

OS_DIR = ../os

CFLAGS += -fPIC -D_REENTRANT

UNAME = $(shell uname)
ifeq ($(UNAME),Linux)
LIBS = \
	$(OS_DIR)/win32/x86_64/serial.dll \
	$(OS_DIR)/linux/x86_64/libserial.so \
	$(OS_DIR)/macosx/x86_64/libserial.jnilib
else
ifeq ($(UNAME),Darwin)
LIBS = \
	$(OS_DIR)/macosx/x86_64/libserial.jnilib
else
LIBS = \
	$(OS_DIR)/win32/x86_64/serial.dll
endif
endif

all:	$(LIBS)

clean :
	$(RM) $(LIBS)

rebuild: clean all

# Windows DLLs have a build timestamp in them. This makes it impossible to have reproducible builds.
# However, x86_64-w64-mingw32-ld on Debian/Ubuntu has a patch that overrides the current date
# using the SOURCE_DATE_EPOCH environment variable. Therefore we set SOURCE_DATE_EPOCH to a
# consistent timestamp that can be reproduced. We base it off of the commit timestamp of the
# most recent git commit in this directory.
$(OS_DIR)/win32/x86_64/serial.dll:	serial.c
	mkdir -p $(dir $@)
	SOURCE_DATE_EPOCH=$(shell git log -1 --pretty=format:%ct -- .) x86_64-w64-mingw32-gcc -I"$(JAVA_HOME)/include" -I"$(JAVA_HOME)/include/win32" -shared -o $@ serial.c

$(OS_DIR)/linux/x86_64/libserial.so:	serial.c
	mkdir -p $(dir $@)
	gcc -m64 $(CFLAGS) -I$(JAVA_HOME)/include -I$(JAVA_HOME)/include/linux $(LDFLAGS) -shared -o $@ serial.c

$(OS_DIR)/linux/ppc64le/libserial.so:	serial.c
	mkdir -p $(dir $@)
	gcc -m64 -mcpu=power8 $(CFLAGS) -I$(JAVA_HOME)/include -I$(JAVA_HOME)/include/linux $(LDFLAGS) -shared -o $@ serial.c

$(OS_DIR)/macosx/x86_64/libserial.jnilib:	serial.c
	mkdir -p $(dir $@)
	x86_64-apple-darwin17-clang $(CFLAGS) -I$(JAVA_HOME)/include -I$(JAVA_HOME)/include/darwin $(LDFLAGS) -dynamiclib -o $@ serial.c