1 # $Id: sys.vars.mk,v 1.4 2019/05/27 20:22:52 sjg Exp $
3 # @(#) Copyright (c) 2003-2009, Simon J. Gerraty
5 # This file is provided in the hope that it will
6 # be of use. There is absolutely NO WARRANTY.
7 # Permission to copy, redistribute or otherwise
8 # use this file is hereby granted provided that
9 # the above copyright notice and this notice are
12 # Please send copies of changes and bug-fixes to:
16 # We use the following paradigm for preventing multiple inclusion.
17 # It relies on the fact that conditionals and dependencies are resolved
18 # at the time they are read.
20 # _this ?= ${.PARSEFILE}
21 # .if !target(__${_this}__)
24 .if ${MAKE_VERSION:U0} > 20100408
25 _this = ${.PARSEDIR:tA}/${.PARSEFILE}
27 _this = ${.PARSEDIR}/${.PARSEFILE}
30 # if this is an ancient version of bmake
32 .if ${MAKE_VERSION:M*make-*}
33 # turn it into what we want - just the date
34 MAKE_VERSION := ${MAKE_VERSION:[1]:C,.*-,,}
37 # some useful modifiers
39 # A useful trick for testing multiple :M's against something
40 # :L says to use the variable's name as its value - ie. literal
41 # got = ${clean* destroy:${M_ListToMatch:S,V,.TARGETS,}}
42 M_ListToMatch = L:@m@$${V:M$$m}@
43 # match against our initial targets (see above)
44 M_L_TARGETS = ${M_ListToMatch:S,V,_TARGETS,}
46 # turn a list into a set of :N modifiers
47 # NskipFoo = ${Foo:${M_ListToSkip}}
48 M_ListToSkip= O:u:S,^,N,:ts:
50 # type should be a builtin in any sh since about 1980,
51 # but sadly there are exceptions!
52 .if ${.MAKE.OS:Unknown:NBSD/OS} == ""
56 # AUTOCONF := ${autoconf:L:${M_whence}}
57 M_type = @x@(${_type_sh:Utype} $$x) 2> /dev/null; echo;@:sh:[0]:N* found*:[@]:C,[()],,g
58 M_whence = ${M_type}:M/*:[1]
60 # convert a path to a valid shell variable
61 M_P2V = tu:C,[./-],_,g
63 # convert path to absolute
64 .if ${MAKE_VERSION:U0} > 20100408
67 M_tA = C,.*,('cd' & \&\& 'pwd') 2> /dev/null || echo &,:sh
70 .if ${MAKE_VERSION:U0} >= 20170130
71 # M_cmpv allows comparing dotted versions like 3.1.2
72 # ${3.1.2:L:${M_cmpv}} -> 3001002
73 # we use big jumps to handle 3 digits per dot:
74 # ${123.456.789:L:${M_cmpv}} -> 123456789
75 M_cmpv.units = 1 1000 1000000
76 M_cmpv = S,., ,g:_:range:@i@+ $${_:[-$$i]} \* $${M_cmpv.units:[$$i]}@:S,^,expr 0 ,1:sh
79 # absoulte path to what we are reading.
80 _PARSEDIR = ${.PARSEDIR:${M_tA}}
82 # many projects use MAJOR MINOR PATCH versioning
83 # ${OPENSSL:${M_M.M.P_VERSION}} is equivalent to
84 # ${OPENSSL_MAJOR_VERSION}.${OPENSSL_MINOR_VERSION}.${OPENSSL_PATCH_VERSION}
85 M_M.M.P_VERSION = L:@v@$${MAJOR MINOR PATCH:L:@t@$${$$v_$$t_VERSION:U0}@}@:ts.