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Some makefiles do reachover builds. In some cases it is convenient to list subdirs of the distribution in SRCS. It is not very convenient, or always even desirable to have corresponding subdirs in .OBJDIR, so OBJS_SRCS_FILTER allows the makefile to choose. The default value 'R' matches existing practice. But a makefile can set OBJS_SRCS_FILTER= T (the R gets added by bsd.init.mk) to avoid the need for subdirs in .OBJDIR Differential Revision: https://reviews.freebsd.org/D12218 Reviewed by: bdrewery
83 lines
2.6 KiB
Makefile
83 lines
2.6 KiB
Makefile
# $FreeBSD$
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# The include file <bsd.init.mk> includes <bsd.opts.mk>,
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# ../Makefile.inc and <bsd.own.mk>; this is used at the
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# top of all <bsd.*.mk> files that actually "build something".
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# bsd.opts.mk is included early so Makefile.inc can use the
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# MK_FOO variables.
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.if !target(__<bsd.init.mk>__)
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__<bsd.init.mk>__:
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.include <bsd.opts.mk>
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.-include "local.init.mk"
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.if exists(${.CURDIR}/../Makefile.inc)
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.include "${.CURDIR}/../Makefile.inc"
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.endif
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.include <bsd.own.mk>
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.MAIN: all
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# This is used in bsd.{dep,lib,prog}.mk as ${OBJS_SRCS_FILTER:ts:}
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# Some makefiles may want T as well to avoid nested objdirs.
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OBJS_SRCS_FILTER+= R
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# Handle INSTALL_AS_USER here to maximize the chance that
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# it has final authority over fooOWN and fooGRP.
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.if ${MK_INSTALL_AS_USER} != "no"
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.if !defined(_uid)
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_uid!= id -u
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.export _uid
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.endif
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.if ${_uid} != 0
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.if !defined(_gid)
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_gid!= id -g
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.export _gid
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.endif
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.for x in BIN CONF DOC DTB INFO KMOD LIB MAN NLS SHARE
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$xOWN= ${_uid}
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$xGRP= ${_gid}
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.endfor
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.endif
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.endif
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# Some targets need to know when something may build. This is used to
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# optimize targets that are only needed when building something, such as
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# (not) reading in depend files. For DIRDEPS_BUILD, it will only calculate
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# the dependency graph at .MAKE.LEVEL==0, so nothing should be built there.
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# Skip "build" logic if:
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# - DIRDEPS_BUILD at MAKELEVEL 0
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# - make -V is used without an override
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# - make install is used without other targets. This is to avoid breaking
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# things like 'make all install' or 'make foo install'.
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# - non-build targets are called
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.if ${MK_DIRDEPS_BUILD} == "yes" && ${.MAKE.LEVEL:U1} == 0 && \
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${BUILD_AT_LEVEL0:Uyes:tl} == "no" && !make(clean*)
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_SKIP_BUILD= not building at level 0
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.elif !empty(.MAKEFLAGS:M-V${_V_DO_BUILD}) || \
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${.TARGETS:M*install*} == ${.TARGETS} || \
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${.TARGETS:Mclean*} == ${.TARGETS} || \
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${.TARGETS:Mdestroy*} == ${.TARGETS} || \
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make(obj) || make(analyze) || make(print-dir)
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# Skip building, but don't show a warning.
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_SKIP_BUILD=
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.endif
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.if ${MK_DIRDEPS_BUILD} == "yes" && ${.MAKE.LEVEL} > 0 && !empty(_SKIP_BUILD)
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.warning ${_SKIP_BUILD}
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.endif
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beforebuild: .PHONY .NOTMAIN
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.if !defined(_SKIP_BUILD)
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all: beforebuild .WAIT
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.endif
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.if ${MK_META_MODE} == "yes"
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.if !exists(/dev/filemon) && \
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${UPDATE_DEPENDFILE:Uyes:tl} != "no" && !defined(NO_FILEMON) && \
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!make(showconfig) && !make(print-dir) && ${.MAKEFLAGS:M-V} == ""
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.warning The filemon module (/dev/filemon) is not loaded.
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.warning META_MODE is less useful for incremental builds without filemon.
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.warning 'kldload filemon' or pass -DNO_FILEMON to suppress this warning.
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.endif
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.endif # ${MK_META_MODE} == "yes"
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.endif # !target(__<bsd.init.mk>__)
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