Fix top-level targets with read-only OBJDIR.

This also makes it so that top-level build targets do not immediately create
the OBJDIR.  Only sub-make targets will do so.  This avoids creating object
directories for targets like 'make check-old' or creating unneeded
MACHINE.MACHINE_ARCH directories during 'make tinderbox'.

Reported by:	npn, lifanov
Tested by:	npn, Mark Millard
Sponsored by:	Dell
This commit is contained in:
Bryan Drewery 2017-11-18 20:01:15 +00:00
parent a7fa261e37
commit 7e0aabd961
Notes: svn2git 2020-12-20 02:59:44 +00:00
svn path=/head/; revision=325974
2 changed files with 11 additions and 0 deletions

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@ -33,6 +33,11 @@ _CAN_USE_AUTO_OBJ?= yes
.if !defined(_CAN_USE_AUTO_OBJ)
_MAKEARGS+= MK_AUTO_OBJ=no
MK_AUTO_OBJ= no
# This will prevent src.sys.obj.mk from opportunistically enabling AUTO_OBJ
# in this make execution and for sub-makes. For all of these targets we
# just want to read any existing OBJDIR but we don't care if we can create
# or write to them.
.MAKEOVERRIDES+= MK_AUTO_OBJ
.endif
.endif # empty(.MAKEOVERRIDES:MMK_AUTO_OBJ)

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@ -19,6 +19,12 @@
# TARGET.TARGET_ARCH added in as it assumes that MAKEOBJDIRPREFIX is
# nested in the existing OBJTOP with TARGET.TARGET_ARCH in it.
#
# The expected OBJDIR is stored in __objdir for auto.obj.mk to use.
#
# AUTO_OBJ is opportunistically enabled if the computed .OBJDIR is writable
# by the current user. Some top-level targets disable this behavior in
# Makefile.sys.inc.
#
_default_makeobjdirprefix?= /usr/obj
_default_makeobjdir= $${.CURDIR:S,^$${SRCTOP},$${OBJTOP},}