1# $Id: meta.sys.mk,v 1.38 2020/08/19 17:51:53 sjg Exp $ 2 3# 4# @(#) Copyright (c) 2010-2020, Simon J. Gerraty 5# 6# This file is provided in the hope that it will 7# be of use. There is absolutely NO WARRANTY. 8# Permission to copy, redistribute or otherwise 9# use this file is hereby granted provided that 10# the above copyright notice and this notice are 11# left intact. 12# 13# Please send copies of changes and bug-fixes to: 14# sjg@crufty.net 15# 16 17# include this if you want to enable meta mode 18# for maximum benefit, requires filemon(4) driver. 19 20.if ${MAKE_VERSION:U0} > 20100901 21.if !target(.ERROR) 22 23.-include <local.meta.sys.mk> 24 25# absolute path to what we are reading. 26_PARSEDIR = ${.PARSEDIR:tA} 27 28.if !defined(SYS_MK_DIR) 29SYS_MK_DIR := ${_PARSEDIR} 30.endif 31 32META_MODE += meta verbose 33.MAKE.MODE ?= ${META_MODE} 34 35.if ${.MAKE.LEVEL} == 0 36_make_mode := ${.MAKE.MODE} ${META_MODE} 37.if ${_make_mode:M*read*} != "" || ${_make_mode:M*nofilemon*} != "" 38# tell everyone we are not updating Makefile.depend* 39UPDATE_DEPENDFILE = NO 40.export UPDATE_DEPENDFILE 41.endif 42.if ${UPDATE_DEPENDFILE:Uyes:tl} == "no" && !exists(/dev/filemon) 43# we should not get upset 44META_MODE += nofilemon 45.export META_MODE 46.endif 47.endif 48 49.if !defined(NO_SILENT) 50.if ${MAKE_VERSION} > 20110818 51# only be silent when we have a .meta file 52META_MODE += silent=yes 53.else 54.SILENT: 55.endif 56.endif 57 58# we use the pseudo machine "host" for the build host. 59# this should be taken care of before we get here 60.if ${OBJTOP:Ua} == ${HOST_OBJTOP:Ub} 61MACHINE = host 62.endif 63 64.if !defined(MACHINE0) 65# it can be handy to know which MACHINE kicked off the build 66# for example, if using Makefild.depend for multiple machines, 67# allowing only MACHINE0 to update can keep things simple. 68MACHINE0 := ${MACHINE} 69.export MACHINE0 70.endif 71 72.if !defined(META2DEPS) 73.if defined(PYTHON) && exists(${PYTHON}) 74# we prefer the python version of this - it is much faster 75META2DEPS ?= ${.PARSEDIR}/meta2deps.py 76.else 77META2DEPS ?= ${.PARSEDIR}/meta2deps.sh 78.endif 79META2DEPS := ${META2DEPS} 80.export META2DEPS 81.endif 82 83MAKE_PRINT_VAR_ON_ERROR += \ 84 .ERROR_TARGET \ 85 .ERROR_META_FILE \ 86 .MAKE.LEVEL \ 87 MAKEFILE \ 88 .MAKE.MODE 89 90.if !defined(SB) && defined(SRCTOP) 91SB = ${SRCTOP:H} 92.endif 93ERROR_LOGDIR ?= ${SB}/error 94meta_error_log = ${ERROR_LOGDIR}/meta-${.MAKE.PID}.log 95 96# we are not interested in make telling us a failure happened elsewhere 97.ERROR: _metaError 98_metaError: .NOMETA .NOTMAIN 99 -@[ "${.ERROR_META_FILE}" ] && { \ 100 grep -q 'failure has been detected in another branch' ${.ERROR_META_FILE} && exit 0; \ 101 mkdir -p ${meta_error_log:H}; \ 102 cp ${.ERROR_META_FILE} ${meta_error_log}; \ 103 echo "ERROR: log ${meta_error_log}" >&2; }; : 104 105.endif 106 107# Are we, after all, in meta mode? 108.if ${.MAKE.MODE:Uno:Mmeta*} != "" 109MKDEP_MK = meta.autodep.mk 110 111.if ${.MAKE.MAKEFILES:M*sys.dependfile.mk} == "" 112# this does all the smarts of setting .MAKE.DEPENDFILE 113.-include <sys.dependfile.mk> 114# check if we got anything sane 115.if ${.MAKE.DEPENDFILE} == ".depend" 116.undef .MAKE.DEPENDFILE 117.endif 118.MAKE.DEPENDFILE ?= Makefile.depend 119.endif 120 121# we can afford to use cookies to prevent some targets 122# re-running needlessly 123META_COOKIE_TOUCH?= touch ${COOKIE.${.TARGET}:U${.OBJDIR}/${.TARGET:T}} 124META_NOPHONY= 125META_NOECHO= : 126 127# some targets involve old pre-built targets 128# ignore mtime of shell 129# and mtime of makefiles does not matter in meta mode 130.MAKE.META.IGNORE_PATHS += \ 131 ${MAKEFILE} \ 132 ${MAKE_SHELL} \ 133 ${SHELL} \ 134 ${SYS_MK_DIR} \ 135 136 137.if ${UPDATE_DEPENDFILE:Uyes:tl} != "no" 138.if ${.MAKEFLAGS:Uno:M-k} != "" 139# make this more obvious 140.warning Setting UPDATE_DEPENDFILE=NO due to -k 141UPDATE_DEPENDFILE= NO 142.export UPDATE_DEPENDFILE 143.elif !exists(/dev/filemon) 144.error ${.newline}ERROR: The filemon module (/dev/filemon) is not loaded. 145.endif 146.endif 147 148.if ${.MAKE.LEVEL} == 0 149# make sure dirdeps target exists and do it first 150all: dirdeps .WAIT 151dirdeps: 152.NOPATH: dirdeps 153 154.if defined(ALL_MACHINES) 155# the first .MAIN: is what counts 156# by default dirdeps is all we want at level0 157.MAIN: dirdeps 158.endif 159 160.endif 161.else 162META_COOKIE_TOUCH= 163# some targets need to be .PHONY in non-meta mode 164META_NOPHONY= .PHONY 165META_NOECHO= echo 166.endif 167.endif 168