xref: /freebsd/contrib/bmake/mk/autodep.mk (revision 0c54932d50a0cbffdd083bf6b2e8d587902f90c9) 
1#
2# RCSid:
3#	$Id: autodep.mk,v 1.37 2020/04/17 21:08:17 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} ${CFLAGS_MF}
72RM?= rm
73MAKE_SHELL?= sh
74
75# watch out for people who don't use CPPFLAGS
76CPPFLAGS_MD=${CFLAGS:M-[IUD]*} ${CPPFLAGS}
77CXXFLAGS_MD=${CXXFLAGS:M-[IUD]*} ${CPPFLAGS}
78
79# just in case these need to be different
80CC_MD?=${CC}
81CXX_MD?=${CXX}
82
83# should have been set by sys.mk
84CXX_SUFFIXES?= .cc .cpp .cxx .C
85
86# so we can do an explicit make depend, but not otherwise
87.if make(depend)
88.SUFFIXES:	.d
89
90.if empty(CFLAGS_MD)
91.y.d:
92	@echo updating dependencies for $<
93	@${YACC} ${YFLAGS} $<
94	@${MAKE_SHELL} -ec "${CC_MD} -M ${CPPFLAGS_MD} y.tab.c | sed '/:/s/^/$@ /' > $@" || { ${RM} -f y.tab.c $@; false; }
95	@${RM} -f y.tab.c
96
97.l.d:
98	@echo updating dependencies for $<
99	${LEX} ${LFLAGS} $<
100	@${MAKE_SHELL} -ec "${CC_MD} -M ${CPPFLAGS_MD} lex.yy.c | sed '/:/s/^/$@ /' > $@" || { ${RM} -f lex.yy.c $@; false; }
101	@${RM} -f lex.yy.c
102
103.c.d:
104	@echo updating dependencies for $<
105	@${MAKE_SHELL} -ec "${CC_MD} -M ${CPPFLAGS_MD} $< | sed '/:/s/^/$@ /' > $@" || { ${RM} -f $@; false; }
106
107.s.d .S.d:
108	@echo updating dependencies for $<
109	@${MAKE_SHELL} -ec "${CC_MD} -M ${CPPFLAGS_MD} ${AINC} $< | sed '/:/s/^/$@ /' > $@" || { ${RM} -f $@; false; }
110
111${CXX_SUFFIXES:%=%.d}:
112	@echo updating dependencies for $<
113	@${MAKE_SHELL} -ec "${CXX_MD} -M ${CXXFLAGS_MD} $< | sed '/:/s/^/$@ /' > $@" || { ${RM} -f $@; false; }
114.else
115.y.d:
116	${YACC} ${YFLAGS} $<
117	${CC_MD} ${CFLAGS_MD:S/D//} ${CPPFLAGS_MD} y.tab.c > $@ || { ${RM} -f y.tab.c $@; false; }
118	${RM} -f y.tab.c
119
120.l.d:
121	${LEX} ${LFLAGS} $<
122	${CC_MD} ${CFLAGS_MD:S/D//} ${CPPFLAGS_MD} lex.yy.c > $@ || { ${RM} -f lex.yy.c $@; false; }
123	${RM} -f lex.yy.c
124
125.c.d:
126	${CC_MD} ${CFLAGS_MD:S/D//} ${CPPFLAGS_MD} $< > $@ || { ${RM} -f $@; false; }
127
128.s.d .S.d:
129	${CC_MD} ${CFLAGS_MD:S/D//} ${CPPFLAGS_MD} ${AINC} $< > $@ || { ${RM} -f $@; false; }
130
131${CXX_SUFFIXES:%=%.d}:
132	${CXX_MD} ${CFLAGS_MD:S/D//} ${CXXFLAGS_MD} $< > $@ || { ${RM} -f $@; false; }
133.endif
134
135.if !target(depend)
136depend: beforedepend ${DEPENDFILE} afterdepend _SUBDIRUSE
137
138${DEPENDFILE}:	${DEPSRCS} ${__dependsrcs}
139.NOPATH:	${__dependsrcs}
140.OPTIONAL:	${__dependsrcs}
141.endif
142.endif				# make(depend)
143
144.if empty(CFLAGS_MD)
145# make sure the .d's are generated/updated
146${PROG} ${_LIBS}:	${DEPENDFILE}
147.endif
148
149.ORDER:	beforedepend ${DEPENDFILE} afterdepend
150
151.if ${.OBJDIR} != ${.CURDIR}
152__depfiles= *.d
153.else
154__depfiles= ${__dependsrcs}
155.endif
156
157DEPCLEANFILES= ${DEPENDFILE} ${__depfiles} y.tab.d *.tmp.d
158
159cleandir: cleanautodepend
160cleanautodepend:
161	${RM} -f ${DEPCLEANFILES}
162
163CLEANFILES+= ${DEPCLEANFILES}
164
165.if defined(__dependsrcs) && !empty(__dependsrcs)
166.if make(depend) || !(make(clean*) || make(destroy*) || make(obj) || make(*install) || make(install-*))
167# this ensures we do the right thing if only building a shared or
168# profiled lib
169OBJ_EXTENSIONS?=.o .po .so .So
170MDLIB_SED= -e '/:/s,^\([^\.:]*\)\.[psS]*o,${OBJ_EXTENSIONS:S,^,\1,},'
171.ifdef NOMD_SED
172.ifdef LIB
173MD_SED=sed ${MDLIB_SED}
174.else
175MD_SED=cat
176.endif
177.else
178# arrange to put some variable names into ${DEPENDFILE}
179.ifdef LIB
180MD_SED=sed ${MDLIB_SED}
181.else
182MD_SED=sed
183.endif
184SUBST_DEPVARS+= SB TOP BACKING SRC SRCDIR BASE BASEDIR
185.for v in ${SUBST_DEPVARS}
186.if defined(${v}) && !empty(${v})
187MD_SED+= -e 's,${$v},$${$v},'
188.endif
189.endfor
190.endif
191.if (${MD_SED} == "sed")
192MD_SED=cat
193.endif
194
195# this will be done whenever make finishes successfully
196.if ${MAKE_VERSION:U0:[1]:C/.*-//} < 20050530
197.END:
198.else
199.END:	${DEPENDFILE}
200# we do not want to trigger building .d's just use them if they exist
201${DEPENDFILE}:	${__dependsrcs:@d@${exists($d):?$d:}@}
202.endif
203	-@${MD_SED} ${__depfiles} > ${DEPENDFILE}.new 2> /dev/null && \
204	test -s ${DEPENDFILE}.new && mv ${DEPENDFILE}.new ${DEPENDFILE}; \
205	${RM} -f ${DEPENDFILE}.new
206.endif
207.endif
208.else
209depend: beforedepend afterdepend _SUBDIRUSE
210.endif
211
212.if !target(beforedepend)
213beforedepend:
214.endif
215.if !target(afterdepend)
216afterdepend:
217.endif
218
219.endif
220