# # Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved. # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. # # This code is free software; you can redistribute it and/or modify it # under the terms of the GNU General Public License version 2 only, as # published by the Free Software Foundation. Oracle designates this # particular file as subject to the "Classpath" exception as provided # by Oracle in the LICENSE file that accompanied this code. # # This code is distributed in the hope that it will be useful, but WITHOUT # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License # version 2 for more details (a copy is included in the LICENSE file that # accompanied this code). # # You should have received a copy of the GNU General Public License version # 2 along with this work; if not, write to the Free Software Foundation, # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. # # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA # or visit www.oracle.com if you need additional information or have any # questions. #
################################################################################ # # This Makefile, together with Tools.gmk, can be used to compile a set of # gcc based cross compilation, portable, self contained packages, capable # of building OpenJDK. # # By default this Makefile will build a native toolchain for the current # platform if called with something like this: # # make tars BASE_OS=OL # # To build the full set of crosstools for additional platforms, use a command # line looking like this: # # make TARGETS="aarch64-linux-gnu" BASE_OS=Fedora # or # make TARGETS="arm-linux-gnueabihf ppc64-linux-gnu" BASE_OS=Fedora BASE_OS_VERSION=17 # # to build several devkits for a specific OS version at once. # You can find the final results under ../../build/devkit/result/<host>-to-<target> # # You may want the native toolchain to be used when compiling the cross # compilation toolchains. To achieve this, first build the native toolchain, # then add the bin directory from this build to the path when invoking this # makefile again for cross compilation. Ex: # # PATH=$PWD/../../build/devkit/result/x86_64-linux-gnu-to-x86_64-linux-gnu/bin:$PATH \ # make TARGETS="arm-linux-gnueabihf,ppc64-linux-gnu" BASE_OS=Fedora # # This is the makefile which iterates over all host and target platforms. #
COMMA := ,
os := $(shell uname -o)
cpu := $(shell uname -p)
# Figure out what platform this is building on.
me := $(cpu)-$(if $(findstring Linux,$(os)),linux-gnu)
$(info Building on platform $(me))
# # By default just build for the current platform, which is assumed to be Linux # ifeq ($(TARGETS), )
platforms := $(me)
host_platforms := $(platforms) else
platforms := $(subst $(COMMA), , $(TARGETS))
host_platforms := $(me) endif
target_platforms := $(platforms)
$(info host_platforms $(host_platforms))
$(info target_platforms $(target_platforms))
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