1# $Id: meta.sys.mk,v 1.32 2017/06/11 03:24:04 sjg Exp $
2
3#
4#	@(#) Copyright (c) 2010, Simon J. Gerraty
5#
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
11#	left intact. 
12#      
13#	Please send copies of changes and bug-fixes to:
14#	sjg@crufty.net
15#
16
17# include this if you want to enable meta mode
18# for maximum benefit, requires filemon(4) driver.
19
20.if ${MAKE_VERSION:U0} > 20100901
21.if !target(.ERROR)
22
23.-include <local.meta.sys.mk>
24
25# absoulte path to what we are reading.
26_PARSEDIR = ${.PARSEDIR:tA}
27
28.if !defined(SYS_MK_DIR)
29SYS_MK_DIR := ${_PARSEDIR}
30.endif
31
32META_MODE += meta verbose
33.MAKE.MODE ?= ${META_MODE}
34
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*
39UPDATE_DEPENDFILE = NO
40.export UPDATE_DEPENDFILE
41.endif
42.if ${UPDATE_DEPENDFILE:Uyes:tl} == "no" && !exists(/dev/filemon)
43# we should not get upset
44META_MODE += nofilemon
45.export META_MODE
46.endif
47.endif
48
49.if !defined(NO_SILENT)
50.if ${MAKE_VERSION} > 20110818
51# only be silent when we have a .meta file
52META_MODE += silent=yes
53.else
54.SILENT:
55.endif
56.endif
57
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}
61MACHINE = host
62.endif
63
64.if ${.MAKE.LEVEL} == 0
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.
68MACHINE0 := ${MACHINE}
69.export MACHINE0
70
71.if defined(PYTHON) && exists(${PYTHON})
72# we prefer the python version of this - it is much faster
73META2DEPS ?= ${.PARSEDIR}/meta2deps.py
74.else
75META2DEPS ?= ${.PARSEDIR}/meta2deps.sh
76.endif
77META2DEPS := ${META2DEPS}
78.export META2DEPS
79.endif
80
81MAKE_PRINT_VAR_ON_ERROR += \
82	.ERROR_TARGET \
83	.ERROR_META_FILE \
84	.MAKE.LEVEL \
85	MAKEFILE \
86	.MAKE.MODE
87
88.if !defined(SB) && defined(SRCTOP)
89SB = ${SRCTOP:H}
90.endif
91ERROR_LOGDIR ?= ${SB}/error
92meta_error_log = ${ERROR_LOGDIR}/meta-${.MAKE.PID}.log
93
94# we are not interested in make telling us a failure happened elsewhere
95.ERROR: _metaError
96_metaError: .NOMETA .NOTMAIN
97	-@[ "${.ERROR_META_FILE}" ] && { \
98	grep -q 'failure has been detected in another branch' ${.ERROR_META_FILE} && exit 0; \
99	mkdir -p ${meta_error_log:H}; \
100	cp ${.ERROR_META_FILE} ${meta_error_log}; \
101	echo "ERROR: log ${meta_error_log}" >&2; }; :
102
103.endif
104
105# Are we, after all, in meta mode?
106.if ${.MAKE.MODE:Uno:Mmeta*} != ""
107MKDEP_MK = meta.autodep.mk
108
109.if ${.MAKE.MAKEFILES:M*sys.dependfile.mk} == ""
110# this does all the smarts of setting .MAKE.DEPENDFILE
111.-include <sys.dependfile.mk>
112# check if we got anything sane
113.if ${.MAKE.DEPENDFILE} == ".depend"
114.undef .MAKE.DEPENDFILE
115.endif
116.MAKE.DEPENDFILE ?= Makefile.depend
117.endif
118
119# we can afford to use cookies to prevent some targets
120# re-running needlessly
121META_COOKIE_TOUCH?= touch ${COOKIE.${.TARGET}:U${.OBJDIR}/${.TARGET:T}}
122META_NOPHONY=
123META_NOECHO= :
124
125# some targets involve old pre-built targets
126# ignore mtime of shell
127# and mtime of makefiles does not matter in meta mode
128.MAKE.META.IGNORE_PATHS += \
129        ${MAKEFILE} \
130        ${SHELL} \
131        ${SYS_MK_DIR}
132
133.if ${UPDATE_DEPENDFILE:Uyes:tl} != "no"
134.if ${.MAKEFLAGS:Uno:M-k} != ""
135# make this more obvious
136.warning Setting UPDATE_DEPENDFILE=NO due to -k
137UPDATE_DEPENDFILE= NO
138.export UPDATE_DEPENDFILE
139.elif !exists(/dev/filemon)
140.error ${.newline}ERROR: The filemon module (/dev/filemon) is not loaded.
141.endif
142.endif
143
144.if ${.MAKE.LEVEL} == 0
145# make sure dirdeps target exists and do it first
146all: dirdeps .WAIT
147dirdeps:
148.NOPATH: dirdeps
149
150.if defined(ALL_MACHINES)
151# the first .MAIN: is what counts
152# by default dirdeps is all we want at level0
153.MAIN: dirdeps
154# tell dirdeps.mk what we want
155BUILD_AT_LEVEL0 = no
156.endif
157.if ${.TARGETS:Nall} == "" 
158# it works best if we do everything via sub-makes
159BUILD_AT_LEVEL0 ?= no
160.endif
161
162.endif
163.else
164META_COOKIE_TOUCH=
165# some targets need to be .PHONY in non-meta mode
166META_NOPHONY= .PHONY
167META_NOECHO= echo
168.endif
169.endif
170