67 lines
1.7 KiB
Makefile
67 lines
1.7 KiB
Makefile
# $Id: srctop.mk,v 1.3 2012/11/11 23:20:18 sjg Exp $
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#
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# @(#) Copyright (c) 2012, Simon J. Gerraty
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#
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# This file is provided in the hope that it will
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# be of use. There is absolutely NO WARRANTY.
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# Permission to copy, redistribute or otherwise
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# use this file is hereby granted provided that
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# the above copyright notice and this notice are
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# left intact.
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#
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# Please send copies of changes and bug-fixes to:
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# sjg@crufty.net
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#
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.if !defined(SRCTOP)
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# if using mk(1) SB will be set.
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.ifdef SB
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.if ${.CURDIR:S,${SB},,} != ${.CURDIR}
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# we are actually within SB
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.ifdef SB_SRC
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SRCTOP:= ${SB_SRC}
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.elif exists(${SB}/src)
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SRCTOP:= ${SB}/src
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.else
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SRCTOP:= ${SB}
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.endif
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.endif
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.endif
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.if !defined(SRCTOP)
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.for rd in share/mk build/mk mk
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.if ${_this_mk_dir:M*${rd}} != ""
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.if ${.CURDIR:S,${_this_mk_dir:${rd:C,[^/]+,H,g:S,/, ,g:ts:}},,} != ${.CURDIR}
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SRCTOP:= ${_this_mk_dir:${rd:C,[^/]+,H,g:S,/, ,g:ts:}}
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.endif
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.endif
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.endfor
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.endif
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.if !defined(SRCTOP)
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_SRCTOP_TEST_?= [ -f ../.sandbox-env -o -d share/mk ]
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# Linux at least has a bug where attempting to check an automounter
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# directory will hang. So avoid looking above /a/b
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SRCTOP!= cd ${.CURDIR}; while :; do \
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here=`pwd`; \
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${_SRCTOP_TEST_} && { echo $$here; break; }; \
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case $$here in /*/*/*) cd ..;; *) echo ""; break;; esac; \
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done
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.endif
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.if defined(SRCTOP) && exists(${SRCTOP}/.)
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.export SRCTOP
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.endif
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.endif
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.if !defined(OBJTOP) && !empty(SRCTOP)
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.if defined(MAKEOBJDIRPREFIX) && exists(${MAKEOBJDIRPREFIX}${SRCTOP})
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OBJTOP= ${MAKEOBJDIRPREFIX}${SRCTOP}
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.elif (exists(${SRCTOP}/Makefile) || exists(${SRCTOP}/makefile))
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OBJTOP!= cd ${SRCTOP} && ${PRINTOBJDIR}
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.endif
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.if empty(OBJTOP)
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OBJTOP= ${SRCTOP}
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.endif
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.export OBJTOP
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.endif
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