# ----------------------------------------------------------------------------

#

# 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) 2005-2007 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 := $(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))

else

__gmsl_root :=

endif

include $(__gmsl_root)__gmsl

endif # __gmsl_included