xref: /freebsd/contrib/bmake/mk/autodep.mk (revision b0d29bc47dba79f6f38e67eabadfb4b32ffd9390) 
1#
2# RCSid:
3#	$Id: autodep.mk,v 1.36 2016/04/05 15:58:37 sjg Exp $
4#
5#	@(#) Copyright (c) 1999-2010, 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# This module provides automagic dependency generation along the
18# lines suggested in the GNU make.info
19# The depend target is mainly for backwards compatibility,
20# dependencies are normally updated as part of compilation.
21
22.if !target(__${.PARSEFILE}__)
23__${.PARSEFILE}__:
24
25DEPENDFILE?= .depend
26.for d in ${DEPENDFILE:N.depend}
27# bmake only groks .depend
28.if ${MAKE_VERSION} < 20160218
29.-include <$d>
30.else
31.dinclude <$d>
32.endif
33.endfor
34
35# it does nothing if SRCS is not defined or is empty
36.if defined(SRCS) && !empty(SRCS)
37DEPSRCS?=${SRCS}
38__depsrcs=${DEPSRCS:M*.c}
39__depsrcs+=${DEPSRCS:M*.y}
40__depsrcs+=${DEPSRCS:M*.l}
41__depsrcs+=${DEPSRCS:M*.s}
42__depsrcs+=${DEPSRCS:M*.S}
43__depsrcs+=${DEPSRCS:M*.cc}
44__depsrcs+=${DEPSRCS:M*.cpp}
45__depsrcs+=${DEPSRCS:M*.C}
46__depsrcs+=${DEPSRCS:M*.cxx}
47__depsrcs+=${DEPSRCS:M*.pc}
48
49.for s in ${__depsrcs}
50${s:T:R}.d:	$s
51.endfor
52
53__depsrcs:=${__depsrcs:T:R:S/$/.d/g}
54# we also need to handle makefiles where the .d's from __depsrcs
55# don't  match those from OBJS
56# we avoid using := here, since the modifier applied to OBJS
57# can cause trouble if there are any undefined vars in OBJS.
58__dependsrcsx?= ${__depsrcs} ${OBJS:S/.o/.d/}
59__dependsrcs= ${__dependsrcsx:O:u}
60
61# clean up any .c files we may have generated
62#__gensrcs:= ${DEPSRCS:M*.y} ${DEPSRCS:M*.l}
63#CLEANFILES+= ${__gensrcs:T:R:S/$/.c/g}
64
65# set this to -MMD to ignore /usr/include
66# actually it ignores <> so may not be a great idea
67CFLAGS_MD?=-MD
68# -MF etc not available on all gcc versions.
69# we "fix" the .o later
70CFLAGS_MF?=-MF ${.TARGET:T:R}.d -MT ${.TARGET:T:R}.o
71CFLAGS+= ${CFLAGS_MD} ${CFLAGS_MF}
72RM?= rm
73
74# watch out for people who don't use CPPFLAGS
75CPPFLAGS_MD=${CFLAGS:M-[IUD]*} ${CPPFLAGS}
76CXXFLAGS_MD=${CXXFLAGS:M-[IUD]*} ${CPPFLAGS}
77
78# just in case these need to be different
79CC_MD?=${CC}
80CXX_MD?=${CXX}
81
82# should have been set by sys.mk
83CXX_SUFFIXES?= .cc .cpp .cxx .C
84
85# so we can do an explicit make depend, but not otherwise
86.if make(depend)
87.SUFFIXES:	.d
88
89.if empty(CFLAGS_MD)
90.y.d:
91	@echo updating dependencies for $<
92	@${YACC} ${YFLAGS} $<
93	@${SHELL} -ec "${CC_MD} -M ${CPPFLAGS_MD} y.tab.c | sed '/:/s/^/$@ /' > $@" || { ${RM} -f y.tab.c $@; false; }
94	@${RM} -f y.tab.c
95
96.l.d:
97	@echo updating dependencies for $<
98	${LEX} ${LFLAGS} $<
99	@${SHELL} -ec "${CC_MD} -M ${CPPFLAGS_MD} lex.yy.c | sed '/:/s/^/$@ /' > $@" || { ${RM} -f lex.yy.c $@; false; }
100	@${RM} -f lex.yy.c
101
102.c.d:
103	@echo updating dependencies for $<
104	@${SHELL} -ec "${CC_MD} -M ${CPPFLAGS_MD} $< | sed '/:/s/^/$@ /' > $@" || { ${RM} -f $@; false; }
105
106.s.d .S.d:
107	@echo updating dependencies for $<
108	@${SHELL} -ec "${CC_MD} -M ${CPPFLAGS_MD} ${AINC} $< | sed '/:/s/^/$@ /' > $@" || { ${RM} -f $@; false; }
109
110${CXX_SUFFIXES:%=%.d}:
111	@echo updating dependencies for $<
112	@${SHELL} -ec "${CXX_MD} -M ${CXXFLAGS_MD} $< | sed '/:/s/^/$@ /' > $@" || { ${RM} -f $@; false; }
113.else
114.y.d:
115	${YACC} ${YFLAGS} $<
116	${CC_MD} ${CFLAGS_MD:S/D//} ${CPPFLAGS_MD} y.tab.c > $@ || { ${RM} -f y.tab.c $@; false; }
117	${RM} -f y.tab.c
118
119.l.d:
120	${LEX} ${LFLAGS} $<
121	${CC_MD} ${CFLAGS_MD:S/D//} ${CPPFLAGS_MD} lex.yy.c > $@ || { ${RM} -f lex.yy.c $@; false; }
122	${RM} -f lex.yy.c
123
124.c.d:
125	${CC_MD} ${CFLAGS_MD:S/D//} ${CPPFLAGS_MD} $< > $@ || { ${RM} -f $@; false; }
126
127.s.d .S.d:
128	${CC_MD} ${CFLAGS_MD:S/D//} ${CPPFLAGS_MD} ${AINC} $< > $@ || { ${RM} -f $@; false; }
129
130${CXX_SUFFIXES:%=%.d}:
131	${CXX_MD} ${CFLAGS_MD:S/D//} ${CXXFLAGS_MD} $< > $@ || { ${RM} -f $@; false; }
132.endif
133
134.if !target(depend)
135depend: beforedepend ${DEPENDFILE} afterdepend _SUBDIRUSE
136
137${DEPENDFILE}:	${DEPSRCS} ${__dependsrcs}
138.NOPATH:	${__dependsrcs}
139.OPTIONAL:	${__dependsrcs}
140.endif
141.endif				# make(depend)
142
143.if empty(CFLAGS_MD)
144# make sure the .d's are generated/updated
145${PROG} ${_LIBS}:	${DEPENDFILE}
146.endif
147
148.ORDER:	beforedepend ${DEPENDFILE} afterdepend
149
150.if ${.OBJDIR} != ${.CURDIR}
151__depfiles= *.d
152.else
153__depfiles= ${__dependsrcs}
154.endif
155
156DEPCLEANFILES= ${DEPENDFILE} ${__depfiles} y.tab.d *.tmp.d
157
158cleandir: cleanautodepend
159cleanautodepend:
160	${RM} -f ${DEPCLEANFILES}
161
162CLEANFILES+= ${DEPCLEANFILES}
163
164.if defined(__dependsrcs) && !empty(__dependsrcs)
165.if make(depend) || !(make(clean*) || make(destroy*) || make(obj) || make(*install) || make(install-*))
166# this ensures we do the right thing if only building a shared or
167# profiled lib
168OBJ_EXTENSIONS?=.o .po .so .So
169MDLIB_SED= -e '/:/s,^\([^\.:]*\)\.[psS]*o,${OBJ_EXTENSIONS:S,^,\1,},'
170.ifdef NOMD_SED
171.ifdef LIB
172MD_SED=sed ${MDLIB_SED}
173.else
174MD_SED=cat
175.endif
176.else
177# arrange to put some variable names into ${DEPENDFILE}
178.ifdef LIB
179MD_SED=sed ${MDLIB_SED}
180.else
181MD_SED=sed
182.endif
183SUBST_DEPVARS+= SB TOP BACKING SRC SRCDIR BASE BASEDIR
184.for v in ${SUBST_DEPVARS}
185.if defined(${v}) && !empty(${v})
186MD_SED+= -e 's,${$v},$${$v},'
187.endif
188.endfor
189.endif
190.if (${MD_SED} == "sed")
191MD_SED=cat
192.endif
193
194# this will be done whenever make finishes successfully
195.if ${MAKE_VERSION:U0:[1]:C/.*-//} < 20050530
196.END:
197.else
198.END:	${DEPENDFILE}
199# we do not want to trigger building .d's just use them if they exist
200${DEPENDFILE}:	${__dependsrcs:@d@${exists($d):?$d:}@}
201.endif
202	-@${MD_SED} ${__depfiles} > ${DEPENDFILE}.new 2> /dev/null && \
203	test -s ${DEPENDFILE}.new && mv ${DEPENDFILE}.new ${DEPENDFILE}; \
204	${RM} -f ${DEPENDFILE}.new
205.endif
206.endif
207.else
208depend: beforedepend afterdepend _SUBDIRUSE
209.endif
210
211.if !target(beforedepend)
212beforedepend:
213.endif
214.if !target(afterdepend)
215afterdepend:
216.endif
217
218.endif
219