# $NetBSD: find-headers.mk,v 1.3 2018/08/22 20:48:36 maya 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. # # 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 # header files in the base system. # # The following variables must be defined before including this file: # # BUILTIN_FIND_HEADERS_VAR is a list of variables to define. These # variables take the value of the path to the file that is # "found". # # BUILTIN_FIND_HEADERS. is the list of header files to find, in # order, on the ${BUILTIN_INCLUDE_DIRS}. The variable is set # to the first path "found" on the filesystem. # # Optionally, the following variables may also be defined: # # BUILTIN_FIND_GREP. 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: # # is the first of the header file listed in # ${BUILTIN_FIND_HEADERS.} that is "found" in # ${BUILTIN_INCLUDE_DIRS}, or else it is "__nonexistent__". # # An example use is: # # BUILTIN_FIND_HEADERS_VAR:= FOO BAR # # BUILTIN_FIND_HEADERS.FOO= header1.h header2.h # BUILTIN_FIND_GREP.FOO= \#define.*FOO # # BUILTIN_FIND_HEADERS.BAR= header3.h heaer/4.h # .include "../../mk/buildlink3/builtin-files.mk" # .if empty(USE_TOOLS:Mecho) USE_TOOLS+= echo .endif .if empty(USE_TOOLS:Mgrep) USE_TOOLS+= grep .endif BUILTIN_INCLUDE_DIRS?= ${COMPILER_INCLUDE_DIRS} ${"${X11_TYPE:Mnative}":?${X11BASE}/include:} .for _var_ in ${BUILTIN_FIND_HEADERS_VAR} . if !defined(${_var_}) ${_var_}= __nonexistent__ . for _file_ in ${BUILTIN_FIND_HEADERS.${_var_}} . for _dir_ in ${BUILTIN_INCLUDE_DIRS} . if !empty(${_var_}:M__nonexistent__) && exists(${_dir_}/${_file_}) . if !defined(BUILTIN_FIND_GREP.${_var_}) ${_var_}= ${_dir_}/${_file_} . else ${_var_}!= \ if ${GREP} -q ${BUILTIN_FIND_GREP.${_var_}:Q} ${_dir_:Q}/${_file_:Q}; then \ ${ECHO} ${_dir_:Q}/${_file_:Q}; \ else \ ${ECHO} __nonexistent__; \ fi . endif . endif . endfor . endfor . endif MAKEVARS+= ${_var_} .endfor