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Date:      Sun, 11 Jan 2009 14:23:50 -0700 (MST)
From:      "M. Warner Losh" <imp@bsdimp.com>
To:        das@FreeBSD.org
Cc:        ed@80386.nl, arch@FreeBSD.org
Subject:   Re: Quick hack to make fast kernel builds easier
Message-ID:  <20090111.142350.1560738814.imp@bsdimp.com>
In-Reply-To: <20090111191251.GA74450@zim.MIT.EDU>
References:  <20090111.095109.-1112748421.imp@bsdimp.com> <20090111172427.GD89178@hoeg.nl> <20090111191251.GA74450@zim.MIT.EDU>

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In message: <20090111191251.GA74450@zim.MIT.EDU>
            David Schultz <das@FreeBSD.ORG> writes:
: On Sun, Jan 11, 2009, Ed Schouten wrote:
: > I often just run `make' in /usr/obj/...,
: > which also saves some typing, but unfortunately that doesn't work when
: > cross compiling.
: 
: Also, as far as I know, there's no convenient way to rebuild a
: single module for another architecture. I use the following script
: called 'arch' to set the appropriate environment variables, so if
: I've already run 'make universe' and I want to rebuild libc for
: sparc64, I say:
: 
:    cd /usr/src/lib/libc && arch sparc64 make
: 
: It would be nice if there were a better mechanism for this that's
: integrated into the build system.

I do one of the following:

(1) env TARGET=arm make buildworld -DNO_CLEAN

or

(2) env TARGET=arm make buildenv
$ cd lib/libc && make

These both work out well enough in practice for me.  I've wanted a
target that was 'reworld' that just did an 'all' and maybe a few other
things, but I've never had the time to polish this up (had it in a
couple of trees that I lost due to disk failure).

I do agree it would be nice if there was some way to do 'all' for a
subdirectory with a 'trust me, I know what I'm doing, so don't do all
that other stuff' flag.

Warner

: #!/bin/sh
: 
: arch=$1
: basepath=/usr/src
: 
: export __MAKE_CONF=/dev/null
: export MAKEOBJDIRPREFIX=/usr/obj/${arch}
: export MACHINE_ARCH=${arch}
: export MACHINE=${arch}
: export CPUTYPE=
: export GROFF_BIN_PATH=/usr/obj/${arch}${basepath}/tmp/legacy/usr/bin
: export GROFF_FONT_PATH=/usr/obj/${arch}${basepath}/tmp/legacy/usr/share/groff_font
: export GROFF_TMAC_PATH=/usr/obj/${arch}${basepath}/tmp/legacy/usr/share/tmac
: export _SHLIBDIRPREFIX=/usr/obj/${arch}${basepath}/tmp
: export INSTALL="sh /usr/src/tools/install.sh"
: export PATH=/usr/obj/${arch}${basepath}/tmp/legacy/usr/sbin:/usr/obj/${arch}${basepath}/tmp/legacy/usr/bin:/usr/obj/${arch}${basepath}/legacy/usr/games:/usr/obj/${arch}${basepath}/tmp/usr/sbin:/usr/obj/${arch}${basepath}/tmp/usr/bin:/usr/obj/${arch}${basepath}/tmp/usr/games:/sbin:/bin:/usr/sbin:/usr/bin
: DESTDIR=/usr/obj/${arch}${basepath}/tmp
: 
: shift
: $*
: 
: 



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