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# $NetBSD: find-files.mk,v 1.6 2010/05/03 05:52:59 obache Exp $
#
# Copyright (c) 2005 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Johnny C. Lam.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. 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.
# 3. All advertising materials mentioning features or use of this software
# must display the following acknowledgement:
# This product includes software developed by the NetBSD
# Foundation, Inc. and its contributors.
# 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
#
#
# This is a "subroutine" that can be included to detect the presence of
# files in the base system.
#
# The following variables must be defined before including this file:
#
# BUILTIN_FIND_FILES_VAR is a list of variables to define. These
# variables take the value of the path to the file that is
# "found".
#
# BUILTIN_FIND_FILES.<var> is the list of paths to files to find, in
# order, on the filesystem. The variable <var> is set to the
# first path "found" on the filesystem.
#
# Optionally, the following variables may also be defined:
#
# BUILTIN_FIND_GREP.<var> is a regular expression that must be
# matched within a file in order for the file to be considered
# "found". If it isn't defined, then we simply check for the
# existence of the file.
#
# After including this file, the following variables are defined:
#
# <var> is the first of the files listed in ${BUILTIN_FIND_FILES.<var>}
# that is "found", or else it is "__nonexistent__".
#
# An example use is:
#
# BUILTIN_FIND_FILES_VAR:= FOO BAR
#
# BUILTIN_FIND_FILES.FOO= /path1 /path2
# BUILTIN_FIND_GREP.FOO= \#define.*FOO
#
# BUILTIN_FIND_FILES.BAR= /path3 /path4
# .include "../../mk/buildlink3/builtin-files.mk"
#
.if empty(USE_TOOLS:Mecho)
USE_TOOLS+= echo
.endif
.if empty(USE_TOOLS:Mgrep)
USE_TOOLS+= grep
.endif
.for _var_ in ${BUILTIN_FIND_FILES_VAR}
. if !defined(${_var_})
${_var_}= __nonexistent__
. for _file_ in ${BUILTIN_FIND_FILES.${_var_}}
. if !empty(${_var_}:M__nonexistent__)
_real_file_= __nonexistent__
. if exists(${_file_})
_real_file_= ${_file_}
. endif
. if !empty(_real_file_:M__nonexistent__) && defined(BEINCLUDES) && !empty(BEINCLUDES)
. for _try_file_ in ${BEINCLUDES:S/;/ /g:=${_file_:S/\/usr\/include\//\//g}}
. if !empty(_real_file_:M__nonexistent__) && exists(${_try_file_})
_real_file_= ${_try_file_}
. endif
. endfor
. endif
. if empty(_real_file_:M__nonexistent__)
. if !defined(BUILTIN_FIND_GREP.${_var_})
${_var_}:= ${_real_file_}
. else
${_var_}!= \
if ${GREP} -q ${BUILTIN_FIND_GREP.${_var_}:Q} ${_real_file_:Q}; then \
${ECHO} ${_real_file_:Q}; \
else \
${ECHO} __nonexistent__; \
fi
. endif
. endif
. endif
. endfor
. endif
MAKEVARS+= ${_var_}
.endfor
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