15f99c0d3SBryan Drewery# $Id: auto.obj.mk,v 1.12 2015/12/16 01:57:06 sjg Exp $ 27750ad47SMarcel Moolenaar# 37750ad47SMarcel Moolenaar# @(#) Copyright (c) 2004, Simon J. Gerraty 47750ad47SMarcel Moolenaar# 57750ad47SMarcel Moolenaar# This file is provided in the hope that it will 67750ad47SMarcel Moolenaar# be of use. There is absolutely NO WARRANTY. 77750ad47SMarcel Moolenaar# Permission to copy, redistribute or otherwise 87750ad47SMarcel Moolenaar# use this file is hereby granted provided that 97750ad47SMarcel Moolenaar# the above copyright notice and this notice are 107750ad47SMarcel Moolenaar# left intact. 117750ad47SMarcel Moolenaar# 127750ad47SMarcel Moolenaar# Please send copies of changes and bug-fixes to: 137750ad47SMarcel Moolenaar# sjg@crufty.net 147750ad47SMarcel Moolenaar# 157750ad47SMarcel Moolenaar 167750ad47SMarcel MoolenaarECHO_TRACE ?= echo 177750ad47SMarcel Moolenaar 187750ad47SMarcel Moolenaar.ifndef Mkdirs 197750ad47SMarcel Moolenaar# A race condition in some versions of mkdir, means that it can bail 207750ad47SMarcel Moolenaar# if another process made a dir that mkdir expected to. 217750ad47SMarcel Moolenaar# We repeat the mkdir -p a number of times to try and work around this. 227750ad47SMarcel Moolenaar# We stop looping as soon as the dir exists. 237750ad47SMarcel Moolenaar# If we get to the end of the loop, a plain mkdir will issue an error. 247750ad47SMarcel MoolenaarMkdirs= Mkdirs() { \ 257750ad47SMarcel Moolenaar for d in $$*; do \ 267750ad47SMarcel Moolenaar for i in 1 2 3 4 5 6; do \ 277750ad47SMarcel Moolenaar mkdir -p $$d; \ 287750ad47SMarcel Moolenaar test -d $$d && return 0; \ 297750ad47SMarcel Moolenaar done > /dev/null 2>&1; \ 307750ad47SMarcel Moolenaar mkdir $$d || exit $$?; \ 317750ad47SMarcel Moolenaar done; } 327750ad47SMarcel Moolenaar.endif 337750ad47SMarcel Moolenaar 347750ad47SMarcel Moolenaar# if MKOBJDIRS is set to auto (and NOOBJ isn't defined) do some magic... 357750ad47SMarcel Moolenaar# This will automatically create objdirs as needed. 367750ad47SMarcel Moolenaar# Skip it if we are just doing 'clean'. 37566bf19aSSimon J. Gerraty.if ${MK_AUTO_OBJ:Uno} == "yes" 38566bf19aSSimon J. GerratyMKOBJDIRS= auto 39566bf19aSSimon J. Gerraty.endif 407750ad47SMarcel Moolenaar.if !defined(NOOBJ) && !defined(NO_OBJ) && ${MKOBJDIRS:Uno} == auto 417750ad47SMarcel Moolenaar# Use __objdir here so it is easier to tweak without impacting 427750ad47SMarcel Moolenaar# the logic. 435f99c0d3SBryan Drewery.if !empty(MAKEOBJDIRPREFIX) 44d86e8e9cSSimon J. Gerraty.if ${.CURDIR:M${MAKEOBJDIRPREFIX}/*} != "" 45d86e8e9cSSimon J. Gerraty# we are already in obj tree! 46d86e8e9cSSimon J. Gerraty__objdir?= ${.CURDIR} 47d86e8e9cSSimon J. Gerraty.endif 48b56a78b6SSimon J. Gerraty__objdir?= ${MAKEOBJDIRPREFIX}${.CURDIR} 49b56a78b6SSimon J. Gerraty.endif 50b56a78b6SSimon J. Gerraty__objdir?= ${MAKEOBJDIR:Uobj} 515f99c0d3SBryan Drewery__objdir:= ${__objdir} 525f99c0d3SBryan Drewery.if ${.OBJDIR:tA} != ${__objdir:tA} 537750ad47SMarcel Moolenaar# We need to chdir, make the directory if needed 547750ad47SMarcel Moolenaar.if !exists(${__objdir}/) && \ 557750ad47SMarcel Moolenaar (${.TARGETS} == "" || ${.TARGETS:Nclean*:N*clean:Ndestroy*} != "") 567750ad47SMarcel Moolenaar# This will actually make it... 577750ad47SMarcel Moolenaar__objdir_made != echo ${__objdir}/; umask ${OBJDIR_UMASK:U002}; \ 587750ad47SMarcel Moolenaar ${ECHO_TRACE} "[Creating objdir ${__objdir}...]" >&2; \ 597750ad47SMarcel Moolenaar ${Mkdirs}; Mkdirs ${__objdir} 607750ad47SMarcel Moolenaar.endif 617750ad47SMarcel Moolenaar# This causes make to use the specified directory as .OBJDIR 627750ad47SMarcel Moolenaar.OBJDIR: ${__objdir} 63*5abdb50eSSimon J. Gerraty.if ${.OBJDIR:tA} != ${__objdir:tA} 64*5abdb50eSSimon J. Gerraty# we did not get what we want - do we care? 65*5abdb50eSSimon J. Gerraty.if ${__objdir_made:Uno:M${__objdir}/*} != "" 6660297063SSimon J. Gerraty# watch out for __objdir being relative path 6760297063SSimon J. Gerraty.if !(${__objdir:M/*} == "" && ${.OBJDIR:tA} == ${${.CURDIR}/${__objdir}:L:tA}) 68ccfb9654SSimon J. Gerraty.error could not use ${__objdir}: .OBJDIR=${.OBJDIR} 697750ad47SMarcel Moolenaar.endif 707750ad47SMarcel Moolenaar.endif 71*5abdb50eSSimon J. Gerraty# apparently we can live with it 72*5abdb50eSSimon J. Gerraty# make sure we know what we have 73*5abdb50eSSimon J. Gerraty.OBJDIR: ${.CURDIR} 74*5abdb50eSSimon J. Gerraty.endif 757750ad47SMarcel Moolenaar.endif 7660297063SSimon J. Gerraty.endif 77