freebsd-skq/share/mk/bsd.obj.mk
bdrewery e10157c915 Handle some .OBJDIR == .CURDIR cases.
- If OBJROOT is SRCTOP then don't add on TARGET.TARGET_ARCH.  This
  only happens at the top-level, and for sub-directories when the
  user is clever with MAKEOBJDIRPREFIX=/.
- Don't bother checking 'test -w' on .CURDIR.
- Properly set OBJTOP/OBJROOT to SRCTOP in various needed cases.
- Check if the OBJDIR is writable even for *clean* targets since it
  determines which .OBJDIR the user gets;  If they cannot write to an
  existing eligible .OBJDIR then it needs to clean in .CURDIR instead.
- Add guard to cleanworld/cleanuniverse from removing SRCTOP.
- Ensure OBJTOP is proper for .OBJDIR=.CURDIR which fixes finding
  libraries since src.libnames.mk is based on OBJTOP.
- Avoid some chdir(2) for modifying .OBJDIR

Sponsored by:	Dell EMC Isilon
2017-11-10 02:09:33 +00:00

249 lines
6.4 KiB
Makefile

# $FreeBSD$
#
# The include file <bsd.obj.mk> handles creating the 'obj' directory
# and cleaning up object files, etc.
#
# +++ variables +++
#
# CLEANDIRS Additional directories to remove for the clean target.
#
# CLEANFILES Additional files to remove for the clean target.
#
# MAKEOBJDIR A pathname for the directory where the targets
# are built. Note: MAKEOBJDIR is an *environment* variable
# and works properly only if set as an environment variable,
# not as a global or command line variable!
#
# E.g. use `env MAKEOBJDIR=temp-obj make'
#
# MAKEOBJDIRPREFIX Specifies somewhere other than /usr/obj to root the object
# tree. Note: MAKEOBJDIRPREFIX is an *environment* variable
# and works properly only if set as an environment variable,
# not as a global or command line variable!
#
# E.g. use `env MAKEOBJDIRPREFIX=/somewhere/obj make'
#
# NO_OBJ Do not create object directories. This should not be set
# if anything is built.
#
# +++ targets +++
#
# clean:
# remove ${CLEANFILES}; remove ${CLEANDIRS} and all contents.
#
# cleandir:
# remove the build directory (and all its contents) created by obj
#
# obj:
# create build directory.
#
.if !target(__<bsd.obj.mk>__)
__<bsd.obj.mk>__:
.include <bsd.own.mk>
.if ${MK_AUTO_OBJ} == "yes"
# it is done by now
objwarn: .PHONY
obj: .PHONY
CANONICALOBJDIR= ${.OBJDIR}
# This is also done in bsd.init.mk
.if defined(NO_OBJ) && ${.OBJDIR} != ${.CURDIR}
# but this makefile does not want it!
.OBJDIR: ${.CURDIR}
.endif
# Handle special case where SRCS is full-pathed and requires
# nested objdirs. This duplicates some auto.obj.mk logic.
.if (!empty(SRCS:M*/*) || !empty(DPSRCS:M*/*)) && \
(${.TARGETS} == "" || ${.TARGETS:Nclean*:N*clean:Ndestroy*} != "")
_wantdirs= ${SRCS:M*/*:H} ${DPSRCS:M*/*:H}
.if !empty(_wantdirs)
_wantdirs:= ${_wantdirs:O:u}
_needdirs=
.for _dir in ${_wantdirs}
.if !exists(${.OBJDIR}/${_dir}/)
_needdirs+= ${_dir}
.endif
.endfor
.endif
.if !empty(_needdirs)
#_mkneededdirs!= umask ${OBJDIR_UMASK:U002}; ${Mkdirs} ${_needdirs}
__objdir_made != umask ${OBJDIR_UMASK:U002}; ${Mkdirs}; \
for dir in ${_needdirs}; do \
dir=${.OBJDIR}/$${dir}; \
${ECHO_TRACE} "[Creating nested objdir $${dir}...]" >&2; \
Mkdirs $${dir}; \
done
.endif
.endif # !empty(SRCS:M*/*) || !empty(DPSRCS:M*/*)
.elif !empty(MAKEOBJDIRPREFIX)
CANONICALOBJDIR:=${MAKEOBJDIRPREFIX}${.CURDIR}
.elif defined(MAKEOBJDIR) && ${MAKEOBJDIR:M/*} != ""
CANONICALOBJDIR:=${MAKEOBJDIR}
OBJTOP?= ${MAKEOBJDIR}
.else
CANONICALOBJDIR:=/usr/obj${.CURDIR}
.endif
.if defined(SRCTOP) && defined(RELDIR) && \
(${CANONICALOBJDIR} == /${RELDIR} || ${.OBJDIR} == /${RELDIR})
.error .OBJDIR incorrectly set to /${RELDIR}
.endif
OBJTOP?= ${.OBJDIR:S,${.CURDIR},,}${SRCTOP}
#
# Warn of unorthodox object directory.
#
# The following directories are tried in order for ${.OBJDIR}:
#
# 1. ${MAKEOBJDIRPREFIX}/`pwd`
# 2. ${MAKEOBJDIR}
# 3. obj.${MACHINE}
# 4. obj
# 5. /usr/obj/`pwd`
# 6. ${.CURDIR}
#
# If ${.OBJDIR} is constructed using canonical cases 1 or 5, or
# case 2 (using MAKEOBJDIR), don't issue a warning. Otherwise,
# issue a warning differentiating between cases 6 and (3 or 4).
#
objwarn: .PHONY
.if !defined(NO_OBJ) && ${.OBJDIR} != ${CANONICALOBJDIR} && \
!(defined(MAKEOBJDIRPREFIX) && exists(${CANONICALOBJDIR}/)) && \
!(defined(MAKEOBJDIR) && exists(${MAKEOBJDIR}/))
.if ${.OBJDIR} == ${.CURDIR}
@${ECHO} "Warning: Object directory not changed from original ${.CURDIR}"
.elif exists(${.CURDIR}/obj.${MACHINE}/) || exists(${.CURDIR}/obj/)
@${ECHO} "Warning: Using ${.OBJDIR} as object directory instead of\
canonical ${CANONICALOBJDIR}"
.endif
.endif
beforebuild: objwarn
.if !defined(NO_OBJ)
.if !target(obj)
obj: .PHONY
@if ! test -d ${CANONICALOBJDIR}/; then \
mkdir -p ${CANONICALOBJDIR}; \
if ! test -d ${CANONICALOBJDIR}/; then \
${ECHO} "Unable to create ${CANONICALOBJDIR}."; \
exit 1; \
fi; \
${ECHO} "${CANONICALOBJDIR} created for ${.CURDIR}"; \
fi
.for dir in ${SRCS:H:O:u} ${DPSRCS:H:O:u}
@if ! test -d ${CANONICALOBJDIR}/${dir}/; then \
mkdir -p ${CANONICALOBJDIR}/${dir}; \
if ! test -d ${CANONICALOBJDIR}/${dir}/; then \
${ECHO} "Unable to create ${CANONICALOBJDIR}/${dir}."; \
exit 1; \
fi; \
${ECHO} "${CANONICALOBJDIR}/${dir} created for ${.CURDIR}"; \
fi
.endfor
.endif
.if !target(objlink)
objlink: .PHONY
@if test -d ${CANONICALOBJDIR}/; then \
rm -f ${.CURDIR}/obj; \
ln -s ${CANONICALOBJDIR} ${.CURDIR}/obj; \
else \
echo "No ${CANONICALOBJDIR} to link to - do a make obj."; \
fi
.endif
.endif # !defined(NO_OBJ)
#
# where would that obj directory be?
#
.if !target(whereobj)
whereobj: .PHONY
@echo ${.OBJDIR}
.endif
# Same check in bsd.progs.mk
.if ${CANONICALOBJDIR} != ${.CURDIR} && exists(${CANONICALOBJDIR}/) && \
(${MK_AUTO_OBJ} == "no" || ${.TARGETS:Nclean*:N*clean:Ndestroy*} == "")
cleanobj: .PHONY
-rm -rf ${CANONICALOBJDIR}
.else
cleanobj: .PHONY clean cleandepend
.endif
@if [ -L ${.CURDIR}/obj ]; then rm -f ${.CURDIR}/obj; fi
# Tell bmake not to look for generated files via .PATH
NOPATH_FILES+= ${CLEANFILES}
.if !empty(NOPATH_FILES)
.NOPATH: ${NOPATH_FILES}
.endif
.if !target(clean)
clean: .PHONY
.if defined(CLEANFILES) && !empty(CLEANFILES)
rm -f ${CLEANFILES}
.endif
.if defined(CLEANDIRS) && !empty(CLEANDIRS)
-rm -rf ${CLEANDIRS}
.endif
.endif
.ORDER: clean all
.if ${MK_AUTO_OBJ} == "yes"
.ORDER: cleanobj all
.ORDER: cleandir all
.endif
.include <bsd.subdir.mk>
cleandir: .PHONY .WAIT cleanobj
.if make(destroy*) && defined(OBJROOT)
# this (rm -rf objdir) is much faster and more reliable than cleaning.
# just in case we are playing games with these...
_OBJDIR?= ${.OBJDIR}
_CURDIR?= ${.CURDIR}
# destroy almost everything
destroy: .PHONY destroy-all
destroy-all: .PHONY
# just remove our objdir
destroy-arch: .PHONY .NOMETA
.if ${_OBJDIR} != ${_CURDIR}
cd ${_CURDIR} && rm -rf ${_OBJDIR}
.endif
.if defined(HOST_OBJTOP)
destroy-host: destroy.host
destroy.host: .PHONY .NOMETA
cd ${_CURDIR} && rm -rf ${HOST_OBJTOP}/${RELDIR:N.}
.endif
.if make(destroy-all) && ${RELDIR} == "."
destroy-all: destroy-stage
.endif
# remove the stage tree
destroy-stage: .PHONY .NOMETA
.if defined(STAGE_ROOT)
cd ${_CURDIR} && rm -rf ${STAGE_ROOT}
.endif
# allow parallel destruction
_destroy_machine_list = common host ${ALL_MACHINE_LIST}
.for m in ${_destroy_machine_list:O:u}
destroy-all: destroy.$m
.if !target(destroy.$m)
destroy.$m: .PHONY .NOMETA
.if ${_OBJDIR} != ${_CURDIR}
cd ${_CURDIR} && rm -rf ${OBJROOT}$m*/${RELDIR:N.}
.endif
.endif
.endfor
.endif
.endif # !target(__<bsd.obj.mk>__)