Rename META_MODE option to DIRDEPS_BUILD

This allows META_FILES option to be renamed META_MODE.
Also add META_COOKIE_TOUCH for use in targets that can benefit
from a cookie when in meta mode.

Differential Revision:	https://reviews.freebsd.org/D4153
Reviewed by:	bdrewery

Makefile

@@ -106,7 +106,7 @@
 
 # Note: we use this awkward construct to be compatible with FreeBSD's
 # old make used in 10.0 and 9.2 and earlier.
-.if defined(MK_META_MODE) && ${MK_META_MODE} == "yes" && !make(showconfig)
+.if defined(MK_DIRDEPS_BUILD) && ${MK_DIRDEPS_BUILD} == "yes" && !make(showconfig)
 # targets/Makefile plays the role of top-level
 .include "targets/Makefile"
 .else
@@ -498,15 +498,15 @@ buildLINT:
 # This makefile does not run in meta mode
 .MAKE.MODE= normal
 # Normally the things we run from here don't either.
-# Using -DWITH_META_FILES
+# Using -DWITH_META_MODE
 # we can buildworld with meta files created which are useful 
 # for debugging, but without any of the rest of a meta mode build.
-MK_META_MODE= no
+MK_DIRDEPS_BUILD= no
 MK_STAGING= no
 # tell meta.autodep.mk to not even think about updating anything.
 UPDATE_DEPENDFILE= NO
 .if !make(showconfig)
-.export MK_META_MODE MK_STAGING UPDATE_DEPENDFILE
+.export MK_DIRDEPS_BUILD MK_STAGING UPDATE_DEPENDFILE
 .endif
 
 .if make(universe)
@@ -516,4 +516,4 @@ MAKE_JOB_ERROR_TOKEN= no
 .endif
 .endif # bmake
 
-.endif				# META_MODE
+.endif				# DIRDEPS_BUILD

include/Makefile

@@ -166,7 +166,7 @@ compat:
 	mtree -deU ${MTREE_FOLLOWS_SYMLINKS} \
 	    -f ${.CURDIR}/../etc/mtree/BSD.include.dist \
 	    -p ${DESTDIR}${INCLUDEDIR} > /dev/null
-.if ${MK_META_MODE} == "yes"
+.if ${MK_DIRDEPS_BUILD} == "yes"
 	@touch ${.TARGET}
 .endif
 
@@ -255,7 +255,7 @@ copies:
 	cd ${.CURDIR}/../sys/teken; \
 	${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 teken.h \
 	    ${DESTDIR}${INCLUDEDIR}/teken
-.if ${MK_META_MODE} == "yes"
+.if ${MK_DIRDEPS_BUILD} == "yes"
 	@touch ${.OBJDIR}/${.TARGET}
 .endif
 
@@ -372,7 +372,7 @@ symlinks:
 		ln -fs ../../../sys/rpc/$$h \
 		    ${DESTDIR}${INCLUDEDIR}/rpc; \
 	done
-.if ${MK_META_MODE} == "yes"
+.if ${MK_DIRDEPS_BUILD} == "yes"
 	@touch ${.OBJDIR}/${.TARGET}
 .endif
 

share/mk/bsd.dep.mk

@@ -163,7 +163,7 @@ beforedepend: ${DHDRS}
 beforebuild: ${DHDRS}
 .endif
 
-.if ${MK_META_MODE} == "yes"
+.if ${MK_DIRDEPS_BUILD} == "yes"
 .include <meta.autodep.mk>
 # this depend: bypasses that below
 # the dependency helps when bootstrapping

share/mk/bsd.subdir.mk

@@ -49,7 +49,7 @@ STANDALONE_SUBDIR_TARGETS?= obj checkdpadd clean cleandepend cleandir \
 .include <bsd.init.mk>
 
 .if !defined(NEED_SUBDIR)
-.if ${.MAKE.LEVEL} == 0 && ${MK_META_MODE} == "yes" && !empty(SUBDIR) && !(make(clean*) || make(destroy*))
+.if ${.MAKE.LEVEL} == 0 && ${MK_DIRDEPS_BUILD} == "yes" && !empty(SUBDIR) && !(make(clean*) || make(destroy*))
 .include <meta.subdir.mk>
 # ignore this
 _SUBDIR:

share/mk/local.meta.sys.mk

@@ -2,7 +2,7 @@
 
 # local configuration specific to meta mode
 # XXX some of this should be in meta.sys.mk
-# we assume that MK_META_MODE=yes
+# we assume that MK_DIRDEPS_BUILD=yes
 
 # we need this until there is an alternative
 MK_INSTALL_AS_USER= yes

share/mk/local.sys.mk

@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-.if ${MK_META_MODE} == "yes"
+.if ${MK_DIRDEPS_BUILD} == "yes"
 MAKE_PRINT_VAR_ON_ERROR+= \
 	.CURDIR \
 	.MAKE \
@@ -23,3 +23,15 @@ MAKE_PRINT_VAR_ON_ERROR += .MAKE.MAKEFILES .PATH
 .endif
 
 .include "src.sys.mk"
+
+.if ${.MAKE.MODE:Unormal:Mmeta*} != ""
+# we can afford to use cookies to prevent some targets
+# re-running needlessly
+META_COOKIE_TOUCH= touch ${COOKIE.${.TARGET}:U${.OBJDIR}/${.TARGET}}
+# some targets need to be .PHONY - but not in meta mode
+META_NOPHONY=
+.else
+META_COOKIE_TOUCH=
+META_NOPHONY= .PHONY
+.endif
+

share/mk/sys.mk

@@ -20,14 +20,14 @@ MACHINE_CPUARCH=${MACHINE_ARCH:C/mips(n32|64)?(el)?/mips/:C/arm(v6)?(eb|hf)?/arm
 # Some options we need now
 __DEFAULT_NO_OPTIONS= \
 	DIRDEPS_CACHE \
+	DIRDEPS_BUILD \
 	META_MODE \
-	META_FILES \
 
 
 __DEFAULT_DEPENDENT_OPTIONS= \
-	AUTO_OBJ/META_MODE \
-	STAGING/META_MODE \
-	SYSROOT/META_MODE
+	AUTO_OBJ/DIRDEPS_BUILD \
+	STAGING/DIRDEPS_BUILD \
+	SYSROOT/DIRDEPS_BUILD
 
 __ENV_ONLY_OPTIONS:= \
 	${__DEFAULT_NO_OPTIONS} \
@@ -43,9 +43,9 @@ __ENV_ONLY_OPTIONS:= \
 
 .include <bsd.mkopt.mk>
 
-.if ${MK_META_MODE} == "yes"
+.if ${MK_DIRDEPS_BUILD} == "yes"
 .sinclude <meta.sys.mk>
-.elif ${MK_META_FILES} == "yes" && defined(.MAKEFLAGS)
+.elif ${MK_META_MODE} == "yes" && defined(.MAKEFLAGS)
 .if ${.MAKEFLAGS:M-B} == ""
 .MAKE.MODE= meta verbose
 .endif

tools/build/options/WITH_DIRDEPS_BUILD

@@ -0,0 +1,37 @@
+.\" $FreeBSD$
+Enable building in meta mode.
+This is an experimental build feature.
+For details see
+http://www.crufty.net/sjg/docs/freebsd-meta-mode.htm.
+.Pp
+The build is driven by dirdeps.mk using
+.Va DIRDEPS
+stored in
+Makefile.depend files found in each directory.
+.Pp
+The build can be started from anywhere, and behaves the same.
+The initial instance of
+.Xr make 1 
+recursively reads
+.Va DIRDEPS
+from Makefile.depend
+computing a graph of tree dependencies from the current origin.
+Setting
+.Va NO_DIRDEPS
+will skip checking dirdep dependencies and will only build in the current
+directory.
+.Pp
+As each target is made
+.Xr make 1
+produces a meta file which is used to capture (and compare)
+the command line,
+as well as any command output.
+If
+.Xr filemon 4
+is available the meta file will also capture a record of files
+used to produce the target by tracking syscalls.
+.Pp
+The build will hide commands ran unless
+.Va NO_SILENT
+is defined.
+.Pp

tools/build/options/WITH_DIRDEPS_CACHE

@@ -2,4 +2,4 @@
 Cache result of dirdeps.mk which can save significant time
 for subsequent builds.
 Depends on
-.Va WITH_META_MODE .
+.Va WITH_DIRDEPS_BUILD .

tools/build/options/WITH_META_FILES

@@ -1,3 +0,0 @@
-.\" $FreeBSD$
-Create meta files during non META_MODE build.
-The meta files can be useful for debugging.

tools/build/options/WITH_META_MODE

@@ -1,37 +1,3 @@
 .\" $FreeBSD$
-Enable building in meta mode.
-This is an experimental build feature.
-For details see
-http://www.crufty.net/sjg/docs/freebsd-meta-mode.htm.
-.Pp
-The build is driven by dirdeps.mk using
-.Va DIRDEPS
-stored in
-Makefile.depend files found in each directory.
-.Pp
-The build can be started from anywhere, and behaves the same.
-The initial instance of
-.Xr make 1 
-recursively reads
-.Va DIRDEPS
-from Makefile.depend
-computing a graph of tree dependencies from the current origin.
-Setting
-.Va NO_DIRDEPS
-will skip checking dirdep dependencies and will only build in the current
-directory.
-.Pp
-As each target is made
-.Xr make 1
-produces a meta file which is used to capture (and compare)
-the command line,
-as well as any command output.
-If
-.Xr filemon 4
-is available the meta file will also capture a record of files
-used to produce the target by tracking syscalls.
-.Pp
-The build will hide commands ran unless
-.Va NO_SILENT
-is defined.
-.Pp
+Create meta files when not doing DIRDEPS_BUILD.
+The meta files can be useful for debugging.

tools/build/options/WITH_STAGING

@@ -4,4 +4,4 @@ This can be best thought of as auto-install to
 .Va DESTDIR
 with some extra meta data to ensure dependencies can be tracked.
 Depends on
-.Va WITH_META_MODE .
+.Va WITH_DIRDEPS_BUILD .

tools/build/options/WITH_SYSROOT

@@ -1,4 +1,4 @@
 .\" $FreeBSD$
 Enable use of sysroot during build.
 Depends on
-.Va WITH_META_MODE .
+.Va WITH_DIRDEPS_BUILD .

usr.bin/xlint/llib/Makefile

@@ -16,6 +16,6 @@ llib-lstdc.ln: llib-lstdc
 
 .include <bsd.prog.mk>
 
-.if ${MK_META_MODE} == "yes"
+.if ${MK_DIRDEPS_BUILD} == "yes"
 LINTFLAGS+= -I${STAGE_INCLUDEDIR}
 .endif