2 # $Id: meta.sys.mk,v 1.19 2014/08/02 23:16:02 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 # absoulte 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 # make defaults .MAKE.DEPENDFILE to .depend
60 # that won't work for us.
61 .if ${.MAKE.DEPENDFILE} == ".depend"
62 .undef .MAKE.DEPENDFILE
65 # if you don't cross build for multiple MACHINEs concurrently, then
66 # .MAKE.DEPENDFILE = Makefile.depend
67 # probably makes sense - you can set that in local.sys.mk
68 .MAKE.DEPENDFILE ?= Makefile.depend.${MACHINE}
70 # we use the pseudo machine "host" for the build host.
71 # this should be taken care of before we get here
72 .if ${OBJTOP:Ua} == ${HOST_OBJTOP:Ub}
76 .if ${.MAKE.LEVEL} == 0
77 # it can be handy to know which MACHINE kicked off the build
78 # for example, if using Makefild.depend for multiple machines,
79 # allowing only MACHINE0 to update can keep things simple.
80 MACHINE0 := ${MACHINE}
83 .if defined(PYTHON) && exists(${PYTHON})
84 # we prefer the python version of this - it is much faster
85 META2DEPS ?= ${.PARSEDIR}/meta2deps.py
87 META2DEPS ?= ${.PARSEDIR}/meta2deps.sh
89 META2DEPS := ${META2DEPS}
93 MAKE_PRINT_VAR_ON_ERROR += \
100 .if !defined(SB) && defined(SRCTOP)
103 ERROR_LOGDIR ?= ${SB}/error
104 meta_error_log = ${ERROR_LOGDIR}/meta-${.MAKE.PID}.log
106 # we are not interested in make telling us a failure happened elsewhere
108 _metaError: .NOMETA .NOTMAIN
109 -@[ "${.ERROR_META_FILE}" ] && { \
110 grep -q 'failure has been detected in another branch' ${.ERROR_META_FILE} && exit 0; \
111 mkdir -p ${meta_error_log:H}; \
112 cp ${.ERROR_META_FILE} ${meta_error_log}; \
113 echo "ERROR: log ${meta_error_log}" >&2; }; :
118 # some targets need to be .PHONY in non-meta mode
120 # Are we, after all, in meta mode?
121 .if ${.MAKE.MODE:Uno:Mmeta*} != ""
122 MKDEP_MK = meta.autodep.mk
124 # we can afford to use cookies to prevent some targets
125 # re-running needlessly
126 META_COOKIE_TOUCH= touch ${COOKIE.${.TARGET}:U${.OBJDIR}/${.TARGET:T}}
129 # some targets involve old pre-built targets
130 # ignore mtime of shell
131 # and mtime of makefiles does not matter in meta mode
132 .MAKE.META.IGNORE_PATHS += \
137 # if we think we are updating dependencies,
138 # then filemon had better be present
139 .if ${UPDATE_DEPENDFILE:Uyes:tl} != "no" && !exists(/dev/filemon)
140 .error ${.newline}ERROR: The filemon module (/dev/filemon) is not loaded.
143 .if ${.MAKE.LEVEL} == 0
144 # make sure dirdeps target exists and do it first
149 .if defined(ALL_MACHINES)
150 # the first .MAIN: is what counts
151 # by default dirdeps is all we want at level0
153 # tell dirdeps.mk what we want
156 .if ${.TARGETS:Nall} == ""
157 # it works best if we do everything via sub-makes
158 BUILD_AT_LEVEL0 ?= no