auto.obj.mk revision 246149
1246149Ssjg# $Id: auto.obj.mk,v 1.8 2011/08/08 17:35:20 sjg Exp $ 2246149Ssjg# 3246149Ssjg# @(#) Copyright (c) 2004, Simon J. Gerraty 4246149Ssjg# 5246149Ssjg# This file is provided in the hope that it will 6246149Ssjg# be of use. There is absolutely NO WARRANTY. 7246149Ssjg# Permission to copy, redistribute or otherwise 8246149Ssjg# use this file is hereby granted provided that 9246149Ssjg# the above copyright notice and this notice are 10246149Ssjg# left intact. 11246149Ssjg# 12246149Ssjg# Please send copies of changes and bug-fixes to: 13246149Ssjg# sjg@crufty.net 14246149Ssjg# 15246149Ssjg 16246149SsjgECHO_TRACE ?= echo 17246149Ssjg 18246149Ssjg.ifndef Mkdirs 19246149Ssjg# A race condition in some versions of mkdir, means that it can bail 20246149Ssjg# if another process made a dir that mkdir expected to. 21246149Ssjg# We repeat the mkdir -p a number of times to try and work around this. 22246149Ssjg# We stop looping as soon as the dir exists. 23246149Ssjg# If we get to the end of the loop, a plain mkdir will issue an error. 24246149SsjgMkdirs= Mkdirs() { \ 25246149Ssjg for d in $$*; do \ 26246149Ssjg for i in 1 2 3 4 5 6; do \ 27246149Ssjg mkdir -p $$d; \ 28246149Ssjg test -d $$d && return 0; \ 29246149Ssjg done > /dev/null 2>&1; \ 30246149Ssjg mkdir $$d || exit $$?; \ 31246149Ssjg done; } 32246149Ssjg.endif 33246149Ssjg 34246149Ssjg# if MKOBJDIRS is set to auto (and NOOBJ isn't defined) do some magic... 35246149Ssjg# This will automatically create objdirs as needed. 36246149Ssjg# Skip it if we are just doing 'clean'. 37246149Ssjg.if !defined(NOOBJ) && !defined(NO_OBJ) && ${MKOBJDIRS:Uno} == auto 38246149Ssjg# Use __objdir here so it is easier to tweak without impacting 39246149Ssjg# the logic. 40246149Ssjg__objdir?= ${MAKEOBJDIR} 41246149Ssjg.if ${.OBJDIR} != ${__objdir} 42246149Ssjg# We need to chdir, make the directory if needed 43246149Ssjg.if !exists(${__objdir}/) && \ 44246149Ssjg (${.TARGETS} == "" || ${.TARGETS:Nclean*:N*clean:Ndestroy*} != "") 45246149Ssjg# This will actually make it... 46246149Ssjg__objdir_made != echo ${__objdir}/; umask ${OBJDIR_UMASK:U002}; \ 47246149Ssjg ${ECHO_TRACE} "[Creating objdir ${__objdir}...]" >&2; \ 48246149Ssjg ${Mkdirs}; Mkdirs ${__objdir} 49246149Ssjg.endif 50246149Ssjg# This causes make to use the specified directory as .OBJDIR 51246149Ssjg.OBJDIR: ${__objdir} 52246149Ssjg.if ${.OBJDIR} != ${__objdir} && ${__objdir_made:Uno:M${__objdir}/*} != "" 53246149Ssjg.error could not use ${__objdir} 54246149Ssjg.endif 55246149Ssjg.endif 56246149Ssjg.endif 57