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FAST_DEPEND: Use .dinclude to enable full .depend logic in bmake.

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The inclusion of .MAKE.DEPENDFILE (.depend) has special logic in make
to ignore stale/missing dependencies.  bmake 20160220 added a '.dinclude'
directive that uses the special logic for .depend when including the file.

This fixes a build error when a file is moved or deleted that exists in a
.depend.OBJ file.  This happened in r292782 when sha512c.c "moved" and an
incremental build of lib/libmd would fail with:
  make: don't know how to make /usr/src/lib/libcrypt/../libmd/sha512c.c. Stop

Now this will just be seen as a stale dependency and cause a rebuild:
  make: /usr/obj/usr/src/lib/libmd/.depend.sha512c.o, 13: ignoring stale .depend for /usr/src/lib/libcrypt/../libmd/sha512c.c
  --- sha512c.o ---
  ...
This rebuild will only be done once since the .depend.sha512c.o will
be updated on the build with the -MF flags.

This also removes -MP being passed for the .depend.OBJ generation (which
would create fake targets for system headers) since the logic is no
longer needed to protect from missing files.

Sponsored by:	EMC / Isilon Storage Division
This commit is contained in:
Bryan Drewery 2016-03-11 04:09:56 +00:00
parent b88b232738
commit e32a2cbe39
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=296646
3 changed files with 16 additions and 1 deletions
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2
Makefile
View File

@ -159,6 +159,8 @@ _MAKEOBJDIRPREFIX!= /usr/bin/env -i PATH=${PATH} MK_AUTO_OBJ=no ${MAKE} \
# We cannot blindly use a make which may not be the one we want
# so be exlicit - until all choice is removed.
WANT_MAKE= bmake
# 20160220 - support .dinclude for FAST_DEPEND.
WANT_MAKE_VERSION= 20160220
MYMAKE= ${MAKEOBJDIRPREFIX}${.CURDIR}/make.${MACHINE}/${WANT_MAKE}
.if defined(.PARSEDIR)
HAVE_MAKE= bmake

6
share/mk/bsd.dep.mk
View File

@ -176,7 +176,9 @@ ${_D}.po: ${_DSRC} ${POBJS:S/^${_D}.po$//}
_meta_filemon= 1
.endif
.if ${MK_FAST_DEPEND} == "yes"
.if ${MAKE_VERSION} < 20160220
DEPEND_MP?= -MP
.endif
# Handle OBJS=../somefile.o hacks. Just replace '/' rather than use :T to
# avoid collisions.
DEPEND_FILTER= C,/,_,g
@ -200,7 +202,11 @@ CFLAGS+= ${DEPEND_CFLAGS}
.endif
.if !defined(_SKIP_READ_DEPEND)
.for __depend_obj in ${DEPENDFILES_OBJS}
.if ${MAKE_VERSION} < 20160220
.sinclude "${.OBJDIR}/${__depend_obj}"
.else
.dinclude "${.OBJDIR}/${__depend_obj}"
.endif
.endfor
.endif # !defined(_SKIP_READ_DEPEND)
.endif # !defined(_meta_filemon)

9
sys/conf/kern.post.mk
View File

@ -231,7 +231,10 @@ _meta_filemon= 1
.if ${MK_FAST_DEPEND} == "yes"
DEPENDOBJS+= ${SYSTEM_OBJS} genassym.o
DEPENDFILES_OBJS= ${DEPENDOBJS:O:u:C/^/.depend./}
DEPEND_CFLAGS+= -MD -MP -MF.depend.${.TARGET}
.if ${MAKE_VERSION} < 20160220
DEPEND_MP?= -MP
.endif
DEPEND_CFLAGS+= -MD ${DEPEND_MP} -MF.depend.${.TARGET}
DEPEND_CFLAGS+= -MT${.TARGET}
.if !defined(_meta_filemon)
.if defined(.PARSEDIR)
@ -244,7 +247,11 @@ CFLAGS+= ${DEPEND_CFLAGS}
.endif
.if !defined(_SKIP_READ_DEPEND)
.for __depend_obj in ${DEPENDFILES_OBJS}
.if ${MAKE_VERSION} < 20160220
.sinclude "${.OBJDIR}/${__depend_obj}"
.else
.dinclude "${.OBJDIR}/${__depend_obj}"
.endif
.endfor
.endif # !defined(_SKIP_READ_DEPEND)
.endif # !defined(_meta_filemon)