1# $Id: meta.autodep.mk,v 1.32 2012/11/13 00:44:26 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_this ?= ${.PARSEFILE}
18.if !target(__${_this}__)
19__${_this}__: .NOTMAIN
20
21.-include "local.autodep.mk"
22
23.if defined(SRCS)
24# it would be nice to be able to query .SUFFIXES
25OBJ_EXTENSIONS+= .o .po .lo .So
26
27# explicit dependencies help short-circuit .SUFFIX searches
28SRCS_DEP_FILTER+= N*.[hly]
29.for s in ${SRCS:${SRCS_DEP_FILTER:O:u:ts:}}
30.for e in ${OBJ_EXTENSIONS:O:u}
31.if !target(${s:T:R}$e)
32${s:T:R}$e: $s
33.endif
34.endfor
35.endfor
36.endif
37
38.if make(gendirdeps)
39# you are supposed to know what you are doing!
40UPDATE_DEPENDFILE = yes
41.elif !empty(.TARGETS) && !make(all)
42# do not update the *depend* files 
43# unless we are building the entire directory or the default target.
44# NO means don't update .depend - or Makefile.depend*
45# no means update .depend but not Makefile.depend*
46UPDATE_DEPENDFILE = NO
47.elif ${.MAKEFLAGS:M-k} != ""
48# it is a bad idea to update anything
49UPDATE_DEPENDFILE = NO
50.endif
51
52_CURDIR ?= ${.CURDIR}
53_DEPENDFILE := ${_CURDIR}/${.MAKE.DEPENDFILE:T}
54
55.if ${.MAKE.LEVEL} == 0
56.if ${BUILD_AT_LEVEL0:Uyes:tl} == "no"
57UPDATE_DEPENDFILE = NO
58.endif
59.endif
60.if !exists(${_DEPENDFILE})
61_bootstrap_dirdeps = yes
62.endif
63_bootstrap_dirdeps ?= no
64UPDATE_DEPENDFILE ?= yes
65
66.if ${DEBUG_AUTODEP:Uno:@m@${RELDIR:M$m}@} != ""
67.info ${_DEPENDFILE:S,${SRCTOP}/,,} update=${UPDATE_DEPENDFILE}
68.endif
69
70.if !empty(XMAKE_META_FILE)
71.if exists(${.OBJDIR}/${XMAKE_META_FILE})
72# we cannot get accurate dependencies from an update build
73UPDATE_DEPENDFILE = NO
74.else
75META_XTRAS += ${XMAKE_META_FILE}
76.endif
77.endif
78
79.if ${_bootstrap_dirdeps} == "yes" || exists(${_DEPENDFILE})
80# if it isn't supposed to be touched by us the Makefile should have
81# UPDATE_DEPENDFILE = no
82WANT_UPDATE_DEPENDFILE ?= yes
83.endif
84
85.if ${WANT_UPDATE_DEPENDFILE:Uno:tl} != "no"
86.if ${.MAKE.MODE:Mmeta*} == "" || ${.MAKE.MODE:M*read*} != ""
87UPDATE_DEPENDFILE = no
88.endif
89
90.if ${DEBUG_AUTODEP:Uno:@m@${RELDIR:M$m}@} != ""
91.info ${_DEPENDFILE:S,${SRCTOP}/,,} update=${UPDATE_DEPENDFILE}
92.endif
93
94.if ${UPDATE_DEPENDFILE:tl} == "yes"
95# sometimes we want .meta files generated to aid debugging/error detection
96# but do not want to consider them for dependencies
97# for example the result of running configure
98# just make sure this is not empty
99META_FILE_FILTER ?= N.meta
100
101.if !empty(DPADD)
102# if we have any non-libs in DPADD, 
103# they probably need to be paid attention to
104.if !empty(DPLIBS)
105FORCE_DPADD = ${DPADD:${DPLIBS:${M_ListToSkip}}:${DPADD_LAST:${M_ListToSkip}}}
106.else
107_nonlibs := ${DPADD:T:Nlib*:N*include}
108.if !empty(_nonlibs)
109FORCE_DPADD += ${_nonlibs:@x@${DPADD:M*/$x}@}
110.endif
111.endif
112.endif
113
114.if !make(gendirdeps)
115.END:	gendirdeps
116.endif
117
118# if we don't have OBJS, then .depend isn't useful
119.if !target(.depend) && (!empty(OBJS) || ${.ALLTARGETS:M*.o} != "")
120# some makefiles and/or targets contain
121# circular dependencies if you dig too deep 
122# (as meta mode is apt to do) 
123# so we provide a means of supressing them.
124# the input to the loop below is target: dependency
125# with just one dependency per line.
126# Also some targets are not really local, or use random names.
127# Use local.autodep.mk to provide local additions!
128SUPPRESS_DEPEND += \
129	${SB:S,/,_,g}* \
130	*:y.tab.c \
131	*.c:*.c \
132	*.h:*.h
133
134.NOPATH:	.depend
135# we use ${.MAKE.META.CREATED} to trigger an update but
136# we process using ${.MAKE.META.FILES}
137# the double $$ defers initial evaluation
138# if necessary, we fake .po dependencies, just so the result 
139# in Makefile.depend* is stable
140# The current objdir may be refered to in various ways
141OBJDIR_REFS += ${.OBJDIR} ${.OBJDIR:tA} ${_OBJDIR} ${RELOBJTOP}/${RELDIR}
142_depend = .depend
143# it would be nice to be able to get .SUFFIXES as ${.SUFFIXES}
144# we actually only care about the .SUFFIXES of files that might be 
145# generated by tools like yacc.
146DEPEND_SUFFIXES += .c .h .cpp .hpp .cxx .hxx .cc .hh
147.depend: .NOMETA $${.MAKE.META.CREATED} ${_this}
148	@echo "Updating $@: ${.OODATE:T:[1..8]}"
149	@egrep -i '^R .*\.(${DEPEND_SUFFIXES:tl:O:u:S,^.,,:ts|})$$' /dev/null ${.MAKE.META.FILES:T:O:u:${META_FILE_FILTER:ts:}:M*o.meta} | \
150	sed -e 's, \./, ,${OBJDIR_REFS:O:u:@d@;s, $d/, ,@};/\//d' \
151		-e 's,^\([^/][^/]*\).meta...[0-9]* ,\1: ,' | \
152	sort -u | \
153	while read t d; do \
154		case "$$d:" in $$t) continue;; esac; \
155		case "$$t$$d" in ${SUPPRESS_DEPEND:U.:O:u:ts|}) continue;; esac; \
156		echo $$t $$d; \
157	done > $@.${.MAKE.PID}
158	@case "${.MAKE.META.FILES:T:M*.po.*}" in \
159	*.po.*) mv $@.${.MAKE.PID} $@;; \
160	*) { cat $@.${.MAKE.PID}; \
161	sed 's,\.So:,.o:,;s,\.o:,.po:,' $@.${.MAKE.PID}; } | sort -u > $@; \
162	rm -f $@.${.MAKE.PID};; \
163	esac
164.else
165# make sure this exists
166.depend:
167# do _not_ assume that .depend is in any fit state for us to use
168CAT_DEPEND = /dev/null
169.if ${.MAKE.LEVEL} > 0
170.export CAT_DEPEND
171.endif
172_depend =
173.endif
174
175.if ${DEBUG_AUTODEP:Uno:@m@${RELDIR:M$m}@} != ""
176.info ${_DEPENDFILE:S,${SRCTOP}/,,} _depend=${_depend}
177.endif
178
179gendirdeps:	${_DEPENDFILE}
180
181.if !target(${_DEPENDFILE})
182.if ${_bootstrap_dirdeps} == "yes"
183# We are boot-strapping a new directory
184# Use DPADD to seed DIRDEPS
185.if !empty(DPADD)
186# anything which matches ${_OBJROOT}* but not ${_OBJTOP}*
187# needs to be qualified in DIRDEPS
188# The pseudo machine "host" is used for HOST_TARGET
189DIRDEPS = \
190	${DPADD:M${_OBJTOP}*:H:C,${_OBJTOP}[^/]*/,,:N.:O:u} \
191	${DPADD:M${_OBJROOT}*:N${_OBJTOP}*:H:S,${_OBJROOT},,:C,^([^/]+)/(.*),\2.\1,:S,${HOST_TARGET}$,host,:N.*:O:u}
192
193.endif
194.endif
195
196_gendirdeps_mutex =
197.if defined(NEED_GENDIRDEPS_MUTEX)
198# If a src dir gets built with multiple object dirs,
199# we need a mutex.  Obviously, this is best avoided.
200# Note if .MAKE.DEPENDFILE is common for all ${MACHINE}
201# you either need to mutex, or ensure only one machine builds at a time!
202# lockf is an example of a suitable tool
203LOCKF ?= /usr/bin/lockf
204.if exists(${LOCKF})
205GENDIRDEPS_MUTEXER ?= ${LOCKF} -k
206.endif
207.if empty(GENDIRDEPS_MUTEXER)
208.error NEED_GENDIRDEPS_MUTEX defined, but GENDIRDEPS_MUTEXER not set
209.else
210_gendirdeps_mutex = ${GENDIRDEPS_MUTEXER} ${GENDIRDEPS_MUTEX:U${_CURDIR}/Makefile}
211.endif
212.endif
213
214# If we have META_XTRAS we most likely did not create them
215# but we need to behave as if we did.
216# Avoid adding glob patterns to .MAKE.META.CREATED though.
217.MAKE.META.CREATED += ${META_XTRAS:N*\**:O:u}
218
219.if make(gendirdeps)
220META_FILES = *.meta
221.elif ${OPTIMIZE_OBJECT_META_FILES:Uno:tl} == "no"
222META_FILES = ${.MAKE.META.FILES:T:N.depend*:O:u}
223.else
224# if we have 1000's of .o.meta, .So.meta etc we need only look at one set
225# it is left as an exercise for the reader to work out what this does
226META_FILES = ${.MAKE.META.FILES:T:N.depend*:N*o.meta:O:u} \
227	${.MAKE.META.FILES:T:M*.${.MAKE.META.FILES:M*o.meta:R:E:O:u:[1]}.meta:O:u}
228.endif
229
230.if ${DEBUG_AUTODEP:Uno:@m@${RELDIR:M$m}@} != ""
231.info ${_DEPENDFILE:S,${SRCTOP}/,,}: ${_depend} ${.PARSEDIR}/gendirdeps.mk ${META2DEPS} xtras=${META_XTRAS}
232.endif
233
234.if ${.MAKE.LEVEL} > 0 && !empty(GENDIRDEPS_FILTER)
235.export GENDIRDEPS_FILTER
236.endif
237
238# we might have .../ in MAKESYSPATH
239_makesyspath:= ${_PARSEDIR}
240${_DEPENDFILE}: ${_depend} ${.PARSEDIR}/gendirdeps.mk  ${META2DEPS} $${.MAKE.META.CREATED}
241	@echo Checking $@: ${.OODATE:T:[1..8]}
242	@(cd . && \
243	SKIP_GENDIRDEPS='${SKIP_GENDIRDEPS:O:u}' \
244	DPADD='${FORCE_DPADD:O:u}' ${_gendirdeps_mutex} \
245	MAKESYSPATH=${_makesyspath} \
246	${.MAKE} -f gendirdeps.mk RELDIR=${RELDIR} _DEPENDFILE=${_DEPENDFILE} \
247	META_FILES='${META_XTRAS:T:O:u} ${META_FILES:T:O:u:${META_FILE_FILTER:ts:}}')
248	@test -s $@ && touch $@; :
249.endif
250
251.endif
252.endif
253
254.if ${_bootstrap_dirdeps} == "yes"
255# make sure this is included at least once
256.include <dirdeps.mk>
257.else
258${_DEPENDFILE}: .PRECIOUS
259.endif
260
261CLEANFILES += *.meta filemon.* *.db
262.endif
263