1 # $Id: meta.sys.mk,v 1.38 2020/08/19 17:51:53 sjg Exp $
4 # @(#) Copyright (c) 2010-2020, Simon J. Gerraty
6 # This file is provided in the hope that it will
7 # be of use. There is absolutely NO WARRANTY.
8 # Permission to copy, redistribute or otherwise
9 # use this file is hereby granted provided that
10 # the above copyright notice and this notice are
13 # Please send copies of changes and bug-fixes to:
17 # include this if you want to enable meta mode
18 # for maximum benefit, requires filemon(4) driver.
20 .if ${MAKE_VERSION:U0} > 20100901
23 .-include <local.meta.sys.mk>
25 # absolute path to what we are reading.
26 _PARSEDIR = ${.PARSEDIR:tA}
28 .if !defined(SYS_MK_DIR)
29 SYS_MK_DIR := ${_PARSEDIR}
32 META_MODE += meta verbose
33 .MAKE.MODE ?= ${META_MODE}
35 .if ${.MAKE.LEVEL} == 0
36 _make_mode := ${.MAKE.MODE} ${META_MODE}
37 .if ${_make_mode:M*read*} != "" || ${_make_mode:M*nofilemon*} != ""
38 # tell everyone we are not updating Makefile.depend*
39 UPDATE_DEPENDFILE = NO
40 .export UPDATE_DEPENDFILE
42 .if ${UPDATE_DEPENDFILE:Uyes:tl} == "no" && !exists(/dev/filemon)
43 # we should not get upset
44 META_MODE += nofilemon
49 .if !defined(NO_SILENT)
50 .if ${MAKE_VERSION} > 20110818
51 # only be silent when we have a .meta file
52 META_MODE += silent=yes
58 # we use the pseudo machine "host" for the build host.
59 # this should be taken care of before we get here
60 .if ${OBJTOP:Ua} == ${HOST_OBJTOP:Ub}
64 .if !defined(MACHINE0)
65 # it can be handy to know which MACHINE kicked off the build
66 # for example, if using Makefild.depend for multiple machines,
67 # allowing only MACHINE0 to update can keep things simple.
68 MACHINE0 := ${MACHINE}
72 .if !defined(META2DEPS)
73 .if defined(PYTHON) && exists(${PYTHON})
74 # we prefer the python version of this - it is much faster
75 META2DEPS ?= ${.PARSEDIR}/meta2deps.py
77 META2DEPS ?= ${.PARSEDIR}/meta2deps.sh
79 META2DEPS := ${META2DEPS}
83 MAKE_PRINT_VAR_ON_ERROR += \
90 .if !defined(SB) && defined(SRCTOP)
93 ERROR_LOGDIR ?= ${SB}/error
94 meta_error_log = ${ERROR_LOGDIR}/meta-${.MAKE.PID}.log
96 # we are not interested in make telling us a failure happened elsewhere
98 _metaError: .NOMETA .NOTMAIN
99 -@[ "${.ERROR_META_FILE}" ] && { \
100 grep -q 'failure has been detected in another branch' ${.ERROR_META_FILE} && exit 0; \
101 mkdir -p ${meta_error_log:H}; \
102 cp ${.ERROR_META_FILE} ${meta_error_log}; \
103 echo "ERROR: log ${meta_error_log}" >&2; }; :
107 # Are we, after all, in meta mode?
108 .if ${.MAKE.MODE:Uno:Mmeta*} != ""
109 MKDEP_MK = meta.autodep.mk
111 .if ${.MAKE.MAKEFILES:M*sys.dependfile.mk} == ""
112 # this does all the smarts of setting .MAKE.DEPENDFILE
113 .-include <sys.dependfile.mk>
114 # check if we got anything sane
115 .if ${.MAKE.DEPENDFILE} == ".depend"
116 .undef .MAKE.DEPENDFILE
118 .MAKE.DEPENDFILE ?= Makefile.depend
121 # we can afford to use cookies to prevent some targets
122 # re-running needlessly
123 META_COOKIE_TOUCH?= touch ${COOKIE.${.TARGET}:U${.OBJDIR}/${.TARGET:T}}
127 # some targets involve old pre-built targets
128 # ignore mtime of shell
129 # and mtime of makefiles does not matter in meta mode
130 .MAKE.META.IGNORE_PATHS += \
137 .if ${UPDATE_DEPENDFILE:Uyes:tl} != "no"
138 .if ${.MAKEFLAGS:Uno:M-k} != ""
139 # make this more obvious
140 .warning Setting UPDATE_DEPENDFILE=NO due to -k
141 UPDATE_DEPENDFILE= NO
142 .export UPDATE_DEPENDFILE
143 .elif !exists(/dev/filemon)
144 .error ${.newline}ERROR: The filemon module (/dev/filemon) is not loaded.
148 .if ${.MAKE.LEVEL} == 0
149 # make sure dirdeps target exists and do it first
154 .if defined(ALL_MACHINES)
155 # the first .MAIN: is what counts
156 # by default dirdeps is all we want at level0
163 # some targets need to be .PHONY in non-meta mode