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[056dc6]: slam.sh Maximize Restore History

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slam.sh    97 lines (86 with data), 4.3 kB

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#!/bin/sh
# a quick and dirty way of partially rebuilding the system after a
# change
#
# ("smooth duct tape: the mark of a true craftsman":-)
# This software is part of the SBCL system. See the README file for
# more information.
#
# This software is derived from the CMU CL system, which was
# written at Carnegie Mellon University and released into the
# public domain. The software is in the public domain and is
# provided with absolutely no warranty. See the COPYING and CREDITS
# files for more information.
#######################################################################
# You probably don't want to be using this script unless you
# understand the ordinary system build process pretty well already.
#
# This script is not a reliable way to build the system, but it is
# fast.:-| It can be useful if you are trying to debug a low-level
# problem, e.g. a problem in src/runtime/*.c or in
# src/code/cold-init.lisp. Soon, you'll find yourself wanting to
# test a small change in a file compiled into cold-sbcl.core without
# redoing the entire rebuild-the-system-from-scratch process. You may be
# able to avoid a complete make-host-2.sh by just letting this script
# rebuild only files that have changed. On the other hand, it might
# not work...
#
# It's not anywhere rigorously correct for all small changes, much
# less for all large changes. It can't be, unless we either solve the
# halting problem or totally rearchitect the SBCL sources to support
# incremental recompilation. Beyond that fundamental limitation, even
# an easy special case might not work unless someone's paid attention
# to making it work. Here are some highlights to help you understand
# when it will work:
# * It will rebuild a .fasl file when the corresponding
# .lisp file is out of date.
# * It rebuilds the src/runtime/ files completely, since that
# doesn't take very long anyway.
# * Apparently it will not rebuild assembly-code-in-.lisp files
# even when the sources are out of date. This is probably not a
# fundamental limitation, it's just that I (WHN 2002-01-16)
# have made vanishingly nontrivial changes to assembler files,
# so I'm not motivated. If you're motivated, please send a patch.
# * It will not notice when you change something in one .lisp file
# which should affect the compilation of code in another .lisp
# file. E.g.
# ** changing the definition of a macro used in another file (or a
# function or a variable which is used at macroexpansion time)
# ** changing the value of a DEFCONSTANT used in another file
# ** changing the layout of a structure used in another file
# ** changing the PROCLAIMed type of something used in another
# file
# Mostly it looks as though such limitations aren't fixable without
# the aforementioned rearchitecting or solving the halting problem.
#######################################################################
if [ "" != "$*" ]; then
echo no command line arguments supported in this version of slam
exit 1
fi
# We don't try to be general about this in this script the way we are
# in make.sh, since the idiosyncrasies of SBCL command line argument
# order dependence, the meaninglessness of duplicate --core arguments,
# and the SBCL-vs-CMUCL dependence of --core/-core argument syntax
# make it too messy to try deal with arbitrary SBCL_XC_HOST variants.
# So you have no choice:
export SBCL_XC_HOST='sbcl --noprogrammer'
# (We don't do make-host-1.sh at all. Hopefully nothing relevant has
# changed.)
sh make-target-1.sh || exit 1
# Instead of doing the full make-host-2.sh, we (1) use after-xc.core
# to rebuild only obviously-out-of-date Lisp files, then (2) run
# GENESIS.
sbcl --core output/after-xc.core --sysinit /dev/null --userinit /dev/null <<'EOF' || exit 1
(load "src/cold/slam.lisp")
EOF
# (This ^ used to be
# for f in $*; do echo "(target-compile-stem \"$f\")"; done \
# | sbcl --core output/after-xc.core || exit 1
# and perhaps we do something like this again, allowing explicit
# rebuild-this-stem requests on the command line to supplement
# the rebuild-obviously-outdated-stems logic above.)
#
sh make-genesis-2.sh || exit 1
sh make-target-2.sh || exit 1
echo //ordinary termination of slam.sh
date