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Allow DEPENDOBJS/DEPENDSRCS to work with only OBJS set and no SRCS.

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Default to tracking .depend.* for OBJS rather than SRCS.

This helps cover some special case builds like gnu/lib/csu which
do more of a PROGS-like thing with bsd.prog.mk.

It is possible this causes out-of-tree Makefiles to have problems if they use
this pattern:
	foo.o: foo.c
		${CC} -o ${.TARGET} ${.ALLSRC}
This may cause multiple source files to be compiled due to finding the
'foo.o: foo.c' dependency both in the Makefile at the .depend file. Or
it may try compiling headers. This can be worked around by either of these:
	foo.o: foo.c
		${CC} -o ${.TARGET} ${.ALLSRC:N*.h:[1]}
Or
	foo.o: foo.c
		${CC} -o ${.TARGET} ${.CURDIR}/foo.c
In the latter case the ${.CURDIR} may need to be a different path. The
first case covers automatically using .PATH.

Sponsored by:	DellEMC
This commit is contained in:
Bryan Drewery 2019-06-15 17:08:35 +00:00
parent dcf1f83876
commit ee4eeb3213
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=349068
1 changed files with 5 additions and 2 deletions
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7
share/mk/bsd.dep.mk
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@ -173,7 +173,7 @@ ${_D}.nossppico: ${_DSRC} ${SOBJS:S/^${_D}.nossppico$//}
.endif
.endfor
.endfor
.endif # defined(SRCS)
.if ${MAKE_VERSION} < 20160220
DEPEND_MP?= -MP
@ -181,11 +181,15 @@ DEPEND_MP?= -MP
# Handle OBJS=../somefile.o hacks. Just replace '/' rather than use :T to
# avoid collisions.
DEPEND_FILTER= C,/,_,g
.if !empty(OBJS)
DEPENDOBJS+= ${OBJS}
.else
DEPENDSRCS+= ${SRCS:M*.[cSC]} ${SRCS:M*.cxx} ${SRCS:M*.cpp} ${SRCS:M*.cc}
DEPENDSRCS+= ${DPSRCS:M*.[cSC]} ${SRCS:M*.cxx} ${SRCS:M*.cpp} ${SRCS:M*.cc}
.if !empty(DEPENDSRCS)
DEPENDOBJS+= ${DEPENDSRCS:${OBJS_SRCS_FILTER:ts:}:S,$,.o,}
.endif
.endif # !empty(OBJS)
.if !empty(DEPENDOBJS)
DEPENDFILES+= ${DEPENDOBJS:O:u:${DEPEND_FILTER}:C/^/${DEPENDFILE}./}
.endif
@ -215,7 +219,6 @@ CFLAGS+= ${${DEPEND_CFLAGS_CONDITION}:?${DEPEND_CFLAGS}:}
.endif
.endfor
.endif # !defined(_meta_filemon)
.endif # defined(SRCS)
.if ${MK_DIRDEPS_BUILD} == "yes" && ${.MAKE.DEPENDFILE} != "/dev/null"
# Prevent meta.autodep.mk from tracking "local dependencies".