Re: incremental bulds from scratch with beinstall.sh

On May 6, 2025, at 11:09, Simon J. Gerraty <sjg@juniper.net> wrote:

> Mark Millard <marklmi@yahoo.com> wrote:
>>>> # cd /usr/src
>>>> # make buildworld-jobs buildkernel-jobs
>> 
>> The above used older commands and files from before
>> the following install. META_MODE recorded the use of
>> those commands.
> 
> I'm sure you are aware, but maybe not everyone is, that bmake contains a
> number of methods to tame META_MODEs enthusiasm for finding things to
> make a target out-of-date.
> 
> .MAKE.META.IGNORE_PATHS is the cheapest and generally most useful
> 
> .MAKE.META.IGNORE_PATTERNS can be more selective and
> 
> .MAKE.META.IGNORE_FILTER can be expensive, but let you do a lot more.
> 
> With recent bmake (MAKE_VERSION > 20220126) you can also set target local
> variables which means you can set say .MAKE.META.IGNORE_PATHS to apply
> only to a given target.
> 
> Of course trying to get too clever can end up being counter productive,
> but the tools are there...

I still have the addition that we found was needed
in my experiments years ago (white space details
below may not have been preserved):

# git -C /usr/main-src/ diff share/
diff --git a/share/mk/src.sys.obj.mk b/share/mk/src.sys.obj.mk
index 708559edcdb8..e710ae057fc6 100644
--- a/share/mk/src.sys.obj.mk
+++ b/share/mk/src.sys.obj.mk
@@ -66,6 +66,9 @@ SB_OBJROOT?=  ${SB}/obj/
 OBJROOT?=      ${SB_OBJROOT}
 .endif
 OBJROOT?=      ${_default_makeobjdirprefix}${SRCTOP}/
+# save the value before we mess with it
+_OBJROOT:= ${OBJROOT:tA}
+.export _OBJROOT
 .if ${OBJROOT:M*/} != ""
 OBJROOT:=      ${OBJROOT:H:tA}/
 .else

where I had to use _OBJROOT to have 2 appropriate paths
built. (See later below.)

It is still not part of the official share/mk/src.sys.obj.mk
so I normally avoid referencing it or what would involve
its use. But I've not checked if it has been added via some
other place providing the definition.

Used via:

# grep -r "\<_OBJROOT\>" ~/src.configs/
/root/src.configs/make.conf:# _OBJROOT is an addition to share/mk/src.sys.obj.mk
/root/src.configs/make.conf:# +_OBJROOT:= ${OBJROOT:tA}
/root/src.configs/make.conf:# +.export _OBJROOT
/root/src.configs/make.conf:IGNORELEGACY_NOSYMLINKPREFIX= ${_OBJROOT}/${TARGET}.${TARGET_ARCH}/tmp/legacy/usr
/root/src.configs/make.conf:IGNOREOTHER_NOSYMLINKPREFIX=  ${_OBJROOT}/${TARGET}.${TARGET_ARCH}/tmp/usr/bin

It was associated with symbolic links begin involved.

===
Mark Millard
marklmi at yahoo.com