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# ----------------------------------------------------------------------------
#
# GNU Make Standard Library (GMSL)
#
# A library of functions to be used with GNU Make's $(call) that
# provides functionality not available in standard GNU Make.
#
# Copyright (c) 2005-2014 John Graham-Cumming
#
# This file is part of GMSL
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# Neither the name of the John Graham-Cumming nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# ----------------------------------------------------------------------------
# Determine if the library has already been included and if so don't
# bother including it again
ifndef __gmsl_included
# Standard definitions for true and false. true is any non-empty
# string, false is an empty string. These are intended for use with
# $(if).
true := T
false :=
# ----------------------------------------------------------------------------
# Function: not
# Arguments: 1: A boolean value
# Returns: Returns the opposite of the arg. (true -> false, false -> true)
# ----------------------------------------------------------------------------
not = $(if $1,$(false),$(true))
# Prevent reinclusion of the library
__gmsl_included := $(true)
# Try to determine where this file is located. If the caller did
# include /foo/gmsl then extract the /foo/ so that __gmsl gets
# included transparently
__gmsl_root :=
ifneq ($(MAKEFILE_LIST),)
__gmsl_root := $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))
# If there are any spaces in the path in __gmsl_root then give up
ifeq (1,$(words $(__gmsl_root)))
__gmsl_root := $(patsubst %gmsl,%,$(__gmsl_root))
endif
endif
include $(__gmsl_root)__gmsl
endif # __gmsl_included
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