1# $Id: meta.sys.mk,v 1.31 2016/09/10 00:44:46 sjg Exp $ 2 3# 4# @(#) Copyright (c) 2010, 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# absoulte 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 ${.MAKE.LEVEL} == 0 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 := ${MACHINE} 69.export MACHINE0 70 71.if defined(PYTHON) && exists(${PYTHON}) 72# we prefer the python version of this - it is much faster 73META2DEPS ?= ${.PARSEDIR}/meta2deps.py 74.else 75META2DEPS ?= ${.PARSEDIR}/meta2deps.sh 76.endif 77META2DEPS := ${META2DEPS} 78.export META2DEPS 79.endif 80 81MAKE_PRINT_VAR_ON_ERROR += \ 82 .ERROR_TARGET \ 83 .ERROR_META_FILE \ 84 .MAKE.LEVEL \ 85 MAKEFILE \ 86 .MAKE.MODE 87 88.if !defined(SB) && defined(SRCTOP) 89SB = ${SRCTOP:H} 90.endif 91ERROR_LOGDIR ?= ${SB}/error 92meta_error_log = ${ERROR_LOGDIR}/meta-${.MAKE.PID}.log 93 94# we are not interested in make telling us a failure happened elsewhere 95.ERROR: _metaError 96_metaError: .NOMETA .NOTMAIN 97 -@[ "${.ERROR_META_FILE}" ] && { \ 98 grep -q 'failure has been detected in another branch' ${.ERROR_META_FILE} && exit 0; \ 99 mkdir -p ${meta_error_log:H}; \ 100 cp ${.ERROR_META_FILE} ${meta_error_log}; \ 101 echo "ERROR: log ${meta_error_log}" >&2; }; : 102 103.endif 104 105# Are we, after all, in meta mode? 106.if ${.MAKE.MODE:Uno:Mmeta*} != "" 107MKDEP_MK = meta.autodep.mk 108 109.if ${.MAKE.MAKEFILES:M*sys.dependfile.mk} == "" 110# this does all the smarts of setting .MAKE.DEPENDFILE 111.-include <sys.dependfile.mk> 112# check if we got anything sane 113.if ${.MAKE.DEPENDFILE} == ".depend" 114.undef .MAKE.DEPENDFILE 115.endif 116.MAKE.DEPENDFILE ?= Makefile.depend 117.endif 118 119# we can afford to use cookies to prevent some targets 120# re-running needlessly 121META_COOKIE_TOUCH?= touch ${COOKIE.${.TARGET}:U${.OBJDIR}/${.TARGET:T}} 122META_NOPHONY= 123 124# some targets involve old pre-built targets 125# ignore mtime of shell 126# and mtime of makefiles does not matter in meta mode 127.MAKE.META.IGNORE_PATHS += \ 128 ${MAKEFILE} \ 129 ${SHELL} \ 130 ${SYS_MK_DIR} 131 132.if ${UPDATE_DEPENDFILE:Uyes:tl} != "no" 133.if ${.MAKEFLAGS:Uno:M-k} != "" 134# make this more obvious 135.warning Setting UPDATE_DEPENDFILE=NO due to -k 136UPDATE_DEPENDFILE= NO 137.export UPDATE_DEPENDFILE 138.elif !exists(/dev/filemon) 139.error ${.newline}ERROR: The filemon module (/dev/filemon) is not loaded. 140.endif 141.endif 142 143.if ${.MAKE.LEVEL} == 0 144# make sure dirdeps target exists and do it first 145all: dirdeps .WAIT 146dirdeps: 147.NOPATH: dirdeps 148 149.if defined(ALL_MACHINES) 150# the first .MAIN: is what counts 151# by default dirdeps is all we want at level0 152.MAIN: dirdeps 153# tell dirdeps.mk what we want 154BUILD_AT_LEVEL0 = no 155.endif 156.if ${.TARGETS:Nall} == "" 157# it works best if we do everything via sub-makes 158BUILD_AT_LEVEL0 ?= no 159.endif 160 161.endif 162.else 163META_COOKIE_TOUCH= 164# some targets need to be .PHONY in non-meta mode 165META_NOPHONY= .PHONY 166.endif 167.endif 168