meta.sys.mk revision 284345 
1# $FreeBSD: head/share/mk/meta.sys.mk 284345 2015-06-13 19:20:56Z sjg $
2# $Id: meta.sys.mk,v 1.19 2014/08/02 23:16:02 sjg Exp $
3
4#
5#	@(#) Copyright (c) 2010, Simon J. Gerraty
6#
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
12#	left intact. 
13#      
14#	Please send copies of changes and bug-fixes to:
15#	sjg@crufty.net
16#
17
18# include this if you want to enable meta mode
19# for maximum benefit, requires filemon(4) driver.
20
21.if ${MAKE_VERSION:U0} > 20100901
22.if !target(.ERROR)
23
24.-include "local.meta.sys.mk"
25
26# absoulte path to what we are reading.
27_PARSEDIR = ${.PARSEDIR:tA}
28
29META_MODE += meta verbose
30.MAKE.MODE ?= ${META_MODE}
31
32.if ${.MAKE.LEVEL} == 0
33_make_mode := ${.MAKE.MODE} ${META_MODE}
34.if ${_make_mode:M*read*} != "" || ${_make_mode:M*nofilemon*} != ""
35# tell everyone we are not updating Makefile.depend*
36UPDATE_DEPENDFILE = NO
37.export UPDATE_DEPENDFILE
38.endif
39.if ${UPDATE_DEPENDFILE:Uyes:tl} == "no" && !exists(/dev/filemon)
40# we should not get upset
41META_MODE += nofilemon
42.export META_MODE
43.endif
44.endif
45
46.if !defined(NO_SILENT)
47.if ${MAKE_VERSION} > 20110818
48# only be silent when we have a .meta file
49META_MODE += silent=yes
50.else
51.SILENT:
52.endif
53.endif
54
55# make defaults .MAKE.DEPENDFILE to .depend
56# that won't work for us.
57.if ${.MAKE.DEPENDFILE} == ".depend"
58.undef .MAKE.DEPENDFILE
59.endif
60
61# if you don't cross build for multiple MACHINEs concurrently, then
62# .MAKE.DEPENDFILE = Makefile.depend
63# probably makes sense - you can set that in local.sys.mk 
64.MAKE.DEPENDFILE ?= Makefile.depend.${MACHINE}
65
66# we use the pseudo machine "host" for the build host.
67# this should be taken care of before we get here
68.if ${OBJTOP:Ua} == ${HOST_OBJTOP:Ub}
69MACHINE = host
70.endif
71
72.if ${.MAKE.LEVEL} == 0
73# it can be handy to know which MACHINE kicked off the build
74# for example, if using Makefild.depend for multiple machines,
75# allowing only MACHINE0 to update can keep things simple.
76MACHINE0 := ${MACHINE}
77.export MACHINE0
78
79.if defined(PYTHON) && exists(${PYTHON})
80# we prefer the python version of this - it is much faster
81META2DEPS ?= ${.PARSEDIR}/meta2deps.py
82.else
83META2DEPS ?= ${.PARSEDIR}/meta2deps.sh
84.endif
85META2DEPS := ${META2DEPS}
86.export META2DEPS
87.endif
88
89MAKE_PRINT_VAR_ON_ERROR += \
90	.ERROR_TARGET \
91	.ERROR_META_FILE \
92	.MAKE.LEVEL \
93	MAKEFILE \
94	.MAKE.MODE
95
96.if !defined(SB) && defined(SRCTOP)
97SB = ${SRCTOP:H}
98.endif
99ERROR_LOGDIR ?= ${SB}/error
100meta_error_log = ${ERROR_LOGDIR}/meta-${.MAKE.PID}.log
101
102# we are not interested in make telling us a failure happened elsewhere
103.ERROR: _metaError
104_metaError: .NOMETA .NOTMAIN
105	-@[ "${.ERROR_META_FILE}" ] && { \
106	grep -q 'failure has been detected in another branch' ${.ERROR_META_FILE} && exit 0; \
107	mkdir -p ${meta_error_log:H}; \
108	cp ${.ERROR_META_FILE} ${meta_error_log}; \
109	echo "ERROR: log ${meta_error_log}" >&2; }; :
110
111.endif
112
113# Are we, after all, in meta mode?
114.if ${.MAKE.MODE:Mmeta*} != ""
115MKDEP_MK = meta.autodep.mk
116
117# if we think we are updating dependencies, 
118# then filemon had better be present
119.if ${UPDATE_DEPENDFILE:Uyes:tl} != "no" && !exists(/dev/filemon)
120.error ${.newline}ERROR: The filemon module (/dev/filemon) is not loaded.
121.endif
122
123.if ${.MAKE.LEVEL} == 0
124# make sure dirdeps target exists and do it first
125all: dirdeps .WAIT
126dirdeps:
127.NOPATH: dirdeps
128
129.if defined(ALL_MACHINES)
130# the first .MAIN: is what counts
131# by default dirdeps is all we want at level0
132.MAIN: dirdeps
133# tell dirdeps.mk what we want
134BUILD_AT_LEVEL0 = no
135.endif
136.if ${.TARGETS:Nall} == "" 
137# it works best if we do everything via sub-makes
138BUILD_AT_LEVEL0 ?= no
139.endif
140
141.endif
142.endif
143.endif
144