86 lines
3 KiB
Text
86 lines
3 KiB
Text
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# ----------------------------------------------------------------------------
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#
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# GNU Make Standard Library (GMSL)
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#
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# A library of functions to be used with GNU Make's $(call) that
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# provides functionality not available in standard GNU Make.
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#
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# Copyright (c) 2005-2022 John Graham-Cumming
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#
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# This file is part of GMSL
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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#
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# Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# Neither the name of the John Graham-Cumming nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# ----------------------------------------------------------------------------
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# Determine if the library has already been included and if so don't
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# bother including it again
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ifndef __gmsl_included
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# Standard definitions for true and false. true is any non-empty
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# string, false is an empty string. These are intended for use with
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# $(if).
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true := T
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false :=
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# ----------------------------------------------------------------------------
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# Function: not
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# Arguments: 1: A boolean value
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# Returns: Returns the opposite of the arg. (true -> false, false -> true)
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# ----------------------------------------------------------------------------
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not = $(if $1,$(false),$(true))
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# Prevent reinclusion of the library
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__gmsl_included := $(true)
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# Try to determine where this file is located. If the caller did
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# include /foo/gmsl then extract the /foo/ so that __gmsl gets
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# included transparently
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__gmsl_root :=
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ifneq ($(MAKEFILE_LIST),)
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__gmsl_root := $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))
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# If there are any spaces in the path in __gmsl_root then give up
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ifeq (1,$(words $(__gmsl_root)))
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__gmsl_root := $(patsubst %gmsl,%,$(__gmsl_root))
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endif
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endif
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include $(__gmsl_root)__gmsl
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endif # __gmsl_included
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