1 # 2 # Copyright (c) 2012, 2016, Oracle and/or its affiliates. All rights reserved. 3 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 # 5 # This code is free software; you can redistribute it and/or modify it 6 # under the terms of the GNU General Public License version 2 only, as 7 # published by the Free Software Foundation. Oracle designates this 8 # particular file as subject to the "Classpath" exception as provided 9 # by Oracle in the LICENSE file that accompanied this code. 10 # 11 # This code is distributed in the hope that it will be useful, but WITHOUT 12 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 # version 2 for more details (a copy is included in the LICENSE file that 15 # accompanied this code). 16 # 17 # You should have received a copy of the GNU General Public License version 18 # 2 along with this work; if not, write to the Free Software Foundation, 19 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 # 21 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 # or visit www.oracle.com if you need additional information or have any 23 # questions. 24 # 25 26 ### 27 ### This file is just a very small wrapper needed to run the real make/Init.gmk. 28 ### It also performs some sanity checks on make. 29 ### 30 31 # This code will cause FreeBSD make to print an error message and abort, 32 # but GNU Make will treat it as a variable assignment 33 .error ===You are not using GNU Make/gmake, this is a requirement. Check your path.=== 34 35 # The shell code below will be executed on /usr/ccs/bin/make on Solaris and 36 # by OpenBSD make, but not in GNU Make. 37 # /usr/ccs/bin/make lacks basically every other flow control mechanism. 38 .TEST_FOR_NON_GNUMAKE:sh=echo You are not using GNU Make/gmake, this is a requirement. Check your path. 1>&2 39 40 # This will make the rest of the file part of a conditional block on BSD make, 41 # but GNU Make will treat it as an assignment. 42 .if =GNU_ONLY 43 44 # This will cause /usr/ccs/bin/make on Solaris to exit. 45 .TEST_FOR_NON_GNUMAKE:sh=exit 1 46 47 ### Now we can be reasonably sure we're actually running GNU Make. 48 49 # The .FEATURES variable is likely to be unique for GNU Make. 50 ifeq ($(.FEATURES), ) 51 $(info Error: '$(MAKE)' does not seem to be GNU Make, which is a requirement.) 52 $(info Check your path, or upgrade to GNU Make 3.81 or newer.) 53 $(error Cannot continue) 54 endif 55 56 # Assume we have GNU Make, but check version. 57 ifeq ($(strip $(foreach v, 3.81% 3.82% 4.%, $(filter $v, $(MAKE_VERSION)))), ) 58 $(info Error: This version of GNU Make is too low ($(MAKE_VERSION)).) 59 $(info Check your path, or upgrade to GNU Make 3.81 or newer.) 60 $(error Cannot continue) 61 endif 62 63 # In Cygwin, the MAKE variable gets prepended with the current directory if the 64 # make executable is called using a Windows mixed path (c:/cygwin/bin/make.exe). 65 ifneq ($(findstring :, $(MAKE)), ) 66 MAKE := $(patsubst $(CURDIR)%, %, $(patsubst $(CURDIR)/%, %, $(MAKE))) 67 endif 68 69 # Locate this Makefile 70 ifeq ($(filter /%, $(lastword $(MAKEFILE_LIST))),) 71 makefile_path := $(CURDIR)/$(strip $(lastword $(MAKEFILE_LIST))) 72 else 73 makefile_path := $(lastword $(MAKEFILE_LIST)) 74 endif 75 topdir := $(strip $(patsubst %/, %, $(dir $(makefile_path)))) 76 77 # ... and then we can include the real makefile 78 include $(topdir)/make/Init.gmk 79 80 .endif =GNU_ONLY