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1 # BSD LICENSE
2 #
3 # Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
4 # All rights reserved.
5 #
6 # Redistribution and use in source and binary forms, with or without
7 # modification, are permitted provided that the following conditions
8 # are met:
9 #
10 # * Redistributions of source code must retain the above copyright
11 # notice, this list of conditions and the following disclaimer.
12 # * Redistributions in binary form must reproduce the above copyright
13 # notice, this list of conditions and the following disclaimer in
14 # the documentation and/or other materials provided with the
15 # distribution.
16 # * Neither the name of Intel Corporation nor the names of its
17 # contributors may be used to endorse or promote products derived
18 # from this software without specific prior written permission.
19 #
20 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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29 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31
32 # clean helper .mk
33
34 # fast way, no need to do preclean and postclean
35 ifeq ($(PRECLEAN)$(POSTCLEAN),)
36
37 _postclean: $(_CLEAN)
38 @touch _postclean
39
40 else # slower way
41
42 _preclean: $(PRECLEAN)
43 @touch _preclean
44
45 ifneq ($(_CLEAN),)
46 $(_CLEAN): _preclean
47 else
48 _CLEAN = _preclean
49 endif
50
51 _clean: $(_CLEAN)
52 @touch _clean
53
54 ifneq ($(POSTCLEAN),)
55 $(POSTCLEAN): _clean
56 else
57 POSTCLEAN = _clean
58 endif
59
60 _postclean: $(POSTCLEAN)
61 @touch _postclean
62 endif