55 lines
2.2 KiB
Makefile
55 lines
2.2 KiB
Makefile
# $NetBSD: Makefile,v 1.5 1998/05/03 16:50:25 ross Exp $
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# Build a smaller sh (e.g. for boot media)
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#
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# Once upon a time (actually, 11/97) cjs wrote this Makefile and put
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# in a comment explaining why the obvious approach would NOT work,
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# and proceeded to do it in an ugly but functional way. Later (actually,
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# on 3/29/98) Christos came along and did it the simple, clean, and
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# beautiful way which, sadly, does not work. What's funny is, that pesky
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# comment was deleted in the same 3/29 commit.
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#
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# So now, on 5/3/98 ross comes along and decides to fix it. I'm not doing
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# it Curt's way, exactly, but I am going to explain again why this is ugly
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# and, once again, why the obvious way to do it won't work. The reason for
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# this long-winded explaination is obvious: if someone comes along and "fixes"
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# my ugly version I want them to at least get their version to really work.
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#
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# You cannot completely test this makefile by building in the
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# utils/x_sh directory! The whole problem comes from crunchgen(1).
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# The way crunchgen(1) works is to build a makefile in /tmp that includes
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# the makefile from the directory to be crunched. It executes that makefile
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# in order to get the list of files to work on. The key thing is: crunchgen
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# doesn't run from this directory. Therefore, this makefile has to be able
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# to work from some other directory.
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#
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# So, my XXX hack is to locate the sh directory from the different
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# possible subdirectory level counts beneath /usr/src. Note that using
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# objdirs changes the level count and usually makes it impossible to do a
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# relative traversal to another source directory. That's why the :H is
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# used, to cancel out the objdir. ".." won't do it, that moves us up
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# the obj tree.
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#
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# We could just use only the BSDSRCDIR assignment, but right now the use
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# of BSDSRCDIR can be deleted here, and so I didn't want to depend on it
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# in case someday we completely nuke BSDSRCDIR.
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NOMAN=1
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.include <bsd.own.mk>
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.for i in ../../bin/sh \
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../../../bin/sh \
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../../../../bin/sh
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.if exists(${.CURDIR:H}/$i/Makefile)
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SRCDIR?= ${.CURDIR:H}/$i
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.endif
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.endfor
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SRCDIR?= ${BSDSRCDIR}/bin/sh
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CPPFLAGS+= -I${SRCDIR} -DSMALL
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.PATH: ${SRCDIR} ${SRCDIR}/bltin ${SRCDIR}/../../usr.bin/printf
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.include "${SRCDIR}/Makefile"
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