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45 lines
1.5 KiB
Plaintext
45 lines
1.5 KiB
Plaintext
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The /rescue build system here has three goals:
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1) Produce a reliable standalone set of /rescue tools.
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The contents of /rescue are all statically linked and do not depend on
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anything in /bin or /sbin. In particular, they'll continue to
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function even if you've hosed your dynamic /bin and /sbin. For
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example, note that /rescue/mount runs /rescue/mount_nfs and not
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/sbin/mount_nfs. This is more subtle than it looks.
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As an added bonus, /rescue is fairly small (thanks to crunchgen) and
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includes a number of tools (such as gzip, bzip2, vi) that are not
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normally found in /bin and /sbin.
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2) Demonstrate robust use of crunchgen.
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These Makefiles recompile each of the crunchgen components and include
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support for overriding specific library entries. Such techniques
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should be useful elsewhere. For example, boot floppies could use this
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to conditionally compile out features to reduce executable size.
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3) Produce a toolkit suitable for small distributions.
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Install /rescue on a CD or CompactFlash disk, and symlink /bin and
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/sbin to /rescue to produce a small and fairly complete FreeBSD
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system.
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These tools have one big disadvantage: being statically linked, they
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cannot use some advanced library functions that rely on dynamic
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linking. In particular, nsswitch, locales, and pam are likely to all
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rely on dynamic linking in the near future.
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To compile:
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# cd /usr/src/rescue
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# make obj
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# make
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# make install
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Note that rebuilds don't always work correctly; if you run into
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trouble, try 'make clean' before recompiling.
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$FreeBSD$
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