2c3632d14f
Lots of code refactoring, simplification and cleanup. Lots of new unit-tests providing much higher code coverage. All courtesy of rillig at netbsd. Other significant changes: o new read-only variable .SHELL which provides the path of the shell used to run scripts (as defined by the .SHELL target). o variable parsing detects more errors. o new debug option -dl: LINT mode, does the equivalent of := for all variable assignments so that file and line number are reported for variable parse errors.
168 lines
4.0 KiB
Makefile
168 lines
4.0 KiB
Makefile
# $Id: meta.sys.mk,v 1.38 2020/08/19 17:51:53 sjg Exp $
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#
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# @(#) Copyright (c) 2010-2020, Simon J. Gerraty
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#
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# This file is provided in the hope that it will
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# be of use. There is absolutely NO WARRANTY.
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# Permission to copy, redistribute or otherwise
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# use this file is hereby granted provided that
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# the above copyright notice and this notice are
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# left intact.
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#
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# Please send copies of changes and bug-fixes to:
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# sjg@crufty.net
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#
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# include this if you want to enable meta mode
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# for maximum benefit, requires filemon(4) driver.
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.if ${MAKE_VERSION:U0} > 20100901
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.if !target(.ERROR)
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.-include <local.meta.sys.mk>
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# absolute path to what we are reading.
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_PARSEDIR = ${.PARSEDIR:tA}
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.if !defined(SYS_MK_DIR)
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SYS_MK_DIR := ${_PARSEDIR}
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.endif
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META_MODE += meta verbose
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.MAKE.MODE ?= ${META_MODE}
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.if ${.MAKE.LEVEL} == 0
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_make_mode := ${.MAKE.MODE} ${META_MODE}
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.if ${_make_mode:M*read*} != "" || ${_make_mode:M*nofilemon*} != ""
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# tell everyone we are not updating Makefile.depend*
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UPDATE_DEPENDFILE = NO
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.export UPDATE_DEPENDFILE
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.endif
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.if ${UPDATE_DEPENDFILE:Uyes:tl} == "no" && !exists(/dev/filemon)
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# we should not get upset
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META_MODE += nofilemon
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.export META_MODE
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.endif
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.endif
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.if !defined(NO_SILENT)
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.if ${MAKE_VERSION} > 20110818
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# only be silent when we have a .meta file
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META_MODE += silent=yes
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.else
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.SILENT:
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.endif
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.endif
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# we use the pseudo machine "host" for the build host.
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# this should be taken care of before we get here
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.if ${OBJTOP:Ua} == ${HOST_OBJTOP:Ub}
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MACHINE = host
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.endif
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.if !defined(MACHINE0)
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# it can be handy to know which MACHINE kicked off the build
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# for example, if using Makefild.depend for multiple machines,
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# allowing only MACHINE0 to update can keep things simple.
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MACHINE0 := ${MACHINE}
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.export MACHINE0
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.endif
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.if !defined(META2DEPS)
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.if defined(PYTHON) && exists(${PYTHON})
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# we prefer the python version of this - it is much faster
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META2DEPS ?= ${.PARSEDIR}/meta2deps.py
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.else
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META2DEPS ?= ${.PARSEDIR}/meta2deps.sh
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.endif
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META2DEPS := ${META2DEPS}
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.export META2DEPS
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.endif
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MAKE_PRINT_VAR_ON_ERROR += \
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.ERROR_TARGET \
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.ERROR_META_FILE \
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.MAKE.LEVEL \
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MAKEFILE \
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.MAKE.MODE
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.if !defined(SB) && defined(SRCTOP)
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SB = ${SRCTOP:H}
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.endif
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ERROR_LOGDIR ?= ${SB}/error
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meta_error_log = ${ERROR_LOGDIR}/meta-${.MAKE.PID}.log
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# we are not interested in make telling us a failure happened elsewhere
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.ERROR: _metaError
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_metaError: .NOMETA .NOTMAIN
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-@[ "${.ERROR_META_FILE}" ] && { \
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grep -q 'failure has been detected in another branch' ${.ERROR_META_FILE} && exit 0; \
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mkdir -p ${meta_error_log:H}; \
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cp ${.ERROR_META_FILE} ${meta_error_log}; \
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echo "ERROR: log ${meta_error_log}" >&2; }; :
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.endif
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# Are we, after all, in meta mode?
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.if ${.MAKE.MODE:Uno:Mmeta*} != ""
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MKDEP_MK = meta.autodep.mk
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.if ${.MAKE.MAKEFILES:M*sys.dependfile.mk} == ""
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# this does all the smarts of setting .MAKE.DEPENDFILE
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.-include <sys.dependfile.mk>
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# check if we got anything sane
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.if ${.MAKE.DEPENDFILE} == ".depend"
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.undef .MAKE.DEPENDFILE
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.endif
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.MAKE.DEPENDFILE ?= Makefile.depend
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.endif
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# we can afford to use cookies to prevent some targets
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# re-running needlessly
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META_COOKIE_TOUCH?= touch ${COOKIE.${.TARGET}:U${.OBJDIR}/${.TARGET:T}}
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META_NOPHONY=
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META_NOECHO= :
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# some targets involve old pre-built targets
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# ignore mtime of shell
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# and mtime of makefiles does not matter in meta mode
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.MAKE.META.IGNORE_PATHS += \
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${MAKEFILE} \
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${MAKE_SHELL} \
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${SHELL} \
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${SYS_MK_DIR} \
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.if ${UPDATE_DEPENDFILE:Uyes:tl} != "no"
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.if ${.MAKEFLAGS:Uno:M-k} != ""
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# make this more obvious
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.warning Setting UPDATE_DEPENDFILE=NO due to -k
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UPDATE_DEPENDFILE= NO
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.export UPDATE_DEPENDFILE
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.elif !exists(/dev/filemon)
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.error ${.newline}ERROR: The filemon module (/dev/filemon) is not loaded.
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.endif
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.endif
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.if ${.MAKE.LEVEL} == 0
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# make sure dirdeps target exists and do it first
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all: dirdeps .WAIT
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dirdeps:
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.NOPATH: dirdeps
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.if defined(ALL_MACHINES)
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# the first .MAIN: is what counts
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# by default dirdeps is all we want at level0
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.MAIN: dirdeps
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.endif
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.endif
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.else
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META_COOKIE_TOUCH=
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# some targets need to be .PHONY in non-meta mode
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META_NOPHONY= .PHONY
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META_NOECHO= echo
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.endif
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.endif
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