2 # $Id: meta.sys.mk,v 1.32 2017/06/11 03:24:04 sjg Exp $
5 # @(#) Copyright (c) 2010, Simon J. Gerraty
7 # This file is provided in the hope that it will
8 # be of use. There is absolutely NO WARRANTY.
9 # Permission to copy, redistribute or otherwise
10 # use this file is hereby granted provided that
11 # the above copyright notice and this notice are
14 # Please send copies of changes and bug-fixes to:
18 # include this if you want to enable meta mode
19 # for maximum benefit, requires filemon(4) driver.
21 .if ${MAKE_VERSION:U0} > 20100901
24 .-include <local.meta.sys.mk>
26 # absolute path to what we are reading.
27 _PARSEDIR = ${.PARSEDIR:tA}
29 .if !defined(SYS_MK_DIR)
30 SYS_MK_DIR := ${_PARSEDIR}
33 META_MODE += meta verbose
34 .MAKE.MODE ?= ${META_MODE}
36 .if ${.MAKE.LEVEL} == 0
37 _make_mode := ${.MAKE.MODE} ${META_MODE}
38 .if ${_make_mode:M*read*} != "" || ${_make_mode:M*nofilemon*} != ""
39 # tell everyone we are not updating Makefile.depend*
40 UPDATE_DEPENDFILE = NO
41 .export UPDATE_DEPENDFILE
43 .if ${UPDATE_DEPENDFILE:Uyes:tl} == "no" && !exists(/dev/filemon)
44 # we should not get upset
45 META_MODE += nofilemon
50 .if !defined(NO_SILENT)
51 .if ${MAKE_VERSION} > 20110818
52 # only be silent when we have a .meta file
53 META_MODE += silent=yes
59 # we use the pseudo machine "host" for the build host.
60 # this should be taken care of before we get here
61 .if ${OBJTOP:Ua} == ${HOST_OBJTOP:Ub}
65 .if ${.MAKE.LEVEL} == 0
66 # it can be handy to know which MACHINE kicked off the build
67 # for example, if using Makefild.depend for multiple machines,
68 # allowing only MACHINE0 to update can keep things simple.
69 MACHINE0 := ${MACHINE}
72 .if defined(PYTHON) && exists(${PYTHON})
73 # we prefer the python version of this - it is much faster
74 META2DEPS ?= ${.PARSEDIR}/meta2deps.py
76 META2DEPS ?= ${.PARSEDIR}/meta2deps.sh
78 META2DEPS := ${META2DEPS}
82 MAKE_PRINT_VAR_ON_ERROR += \
89 .if !defined(SB) && defined(SRCTOP)
92 ERROR_LOGDIR ?= ${SB}/error
93 meta_error_log = ${ERROR_LOGDIR}/meta-${.MAKE.PID}.log
95 # we are not interested in make telling us a failure happened elsewhere
97 _metaError: .NOMETA .NOTMAIN
98 -@[ "${.ERROR_META_FILE}" ] && { \
99 grep -q 'failure has been detected in another branch' ${.ERROR_META_FILE} && exit 0; \
100 mkdir -p ${meta_error_log:H}; \
101 cp ${.ERROR_META_FILE} ${meta_error_log}; \
102 echo "ERROR: log ${meta_error_log}" >&2; }; :
106 # Are we, after all, in meta mode?
107 .if ${.MAKE.MODE:Uno:Mmeta*} != ""
108 MKDEP_MK = meta.autodep.mk
110 .if ${.MAKE.MAKEFILES:M*sys.dependfile.mk} == ""
111 # this does all the smarts of setting .MAKE.DEPENDFILE
112 .-include <sys.dependfile.mk>
113 # check if we got anything sane
114 .if ${.MAKE.DEPENDFILE} == ".depend"
115 .undef .MAKE.DEPENDFILE
117 .MAKE.DEPENDFILE ?= Makefile.depend
120 # we can afford to use cookies to prevent some targets
121 # re-running needlessly
122 META_COOKIE_TOUCH?= touch ${COOKIE.${.TARGET}:U${.OBJDIR}/${.TARGET:T}}
126 # some targets involve old pre-built targets
127 # ignore mtime of shell
128 # and mtime of makefiles does not matter in meta mode
129 .MAKE.META.IGNORE_PATHS += \
134 .if ${UPDATE_DEPENDFILE:Uyes:tl} != "no"
135 .if ${.MAKEFLAGS:Uno:M-k} != ""
136 # make this more obvious
137 .warning Setting UPDATE_DEPENDFILE=NO due to -k
138 UPDATE_DEPENDFILE= NO
139 .export UPDATE_DEPENDFILE
140 .elif !exists(/dev/filemon)
141 .error ${.newline}ERROR: The filemon module (/dev/filemon) is not loaded.
145 .if ${.MAKE.LEVEL} == 0
146 # make sure dirdeps target exists and do it first
151 .if defined(ALL_MACHINES)
152 # the first .MAIN: is what counts
153 # by default dirdeps is all we want at level0
155 # tell dirdeps.mk what we want
158 .if ${.TARGETS:Nall} == ""
159 # it works best if we do everything via sub-makes
160 BUILD_AT_LEVEL0 ?= no
166 # some targets need to be .PHONY in non-meta mode