1# $FreeBSD$ 2# $Id: auto.obj.mk,v 1.12 2015/12/16 01:57:06 sjg Exp $ 3# 4# @(#) Copyright (c) 2004, 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 17ECHO_TRACE ?= echo 18 19.ifndef Mkdirs 20# A race condition in some versions of mkdir, means that it can bail 21# if another process made a dir that mkdir expected to. 22# We repeat the mkdir -p a number of times to try and work around this. 23# We stop looping as soon as the dir exists. 24# If we get to the end of the loop, a plain mkdir will issue an error. 25Mkdirs= Mkdirs() { \ 26 for d in $$*; do \ 27 for i in 1 2 3 4 5 6; do \ 28 mkdir -p $$d; \ 29 test -d $$d && return 0; \ 30 done > /dev/null 2>&1; \ 31 mkdir $$d || exit $$?; \ 32 done; } 33.endif 34 35# if MKOBJDIRS is set to auto (and NOOBJ isn't defined) do some magic... 36# This will automatically create objdirs as needed. 37# Skip it if we are just doing 'clean'. 38.if ${MK_AUTO_OBJ:Uno} == "yes" 39MKOBJDIRS= auto 40.endif 41.if !defined(NOOBJ) && !defined(NO_OBJ) && ${MKOBJDIRS:Uno} == auto 42# Use __objdir here so it is easier to tweak without impacting 43# the logic. 44.if !empty(MAKEOBJDIRPREFIX) 45.if ${.CURDIR:M${MAKEOBJDIRPREFIX}/*} != "" 46# we are already in obj tree! 47__objdir?= ${.CURDIR} 48.endif 49__objdir?= ${MAKEOBJDIRPREFIX}${.CURDIR} 50.endif 51__objdir?= ${MAKEOBJDIR:Uobj} 52__objdir:= ${__objdir} 53.if ${.OBJDIR:tA} != ${__objdir:tA} 54# We need to chdir, make the directory if needed 55.if !exists(${__objdir}/) && \ 56 (${.TARGETS} == "" || ${.TARGETS:Nclean*:N*clean:Ndestroy*} != "") 57# This will actually make it... 58__objdir_made != echo ${__objdir}/; umask ${OBJDIR_UMASK:U002}; \ 59 ${ECHO_TRACE} "[Creating objdir ${__objdir}...]" >&2; \ 60 ${Mkdirs}; Mkdirs ${__objdir} 61.endif 62# This causes make to use the specified directory as .OBJDIR 63.OBJDIR: ${__objdir} 64.if ${.OBJDIR:tA} != ${__objdir:tA} && ${__objdir_made:Uno:M${__objdir}/*} != "" 65# watch out for __objdir being relative path 66.if !(${__objdir:M/*} == "" && ${.OBJDIR:tA} == ${${.CURDIR}/${__objdir}:L:tA}) 67.error could not use ${__objdir}: .OBJDIR=${.OBJDIR} 68.endif 69.endif 70.endif 71.endif 72