freebsd-dev/rescue
Dimitry Andric 02b6306fb0 In r232153, libarchive 3.0.3 was imported, replacing the archive_hash.h
header with archive_crypto_private.h, and its ARCHIVE_HASH_xxx macros
were renamed to ARCHIVE_CRYPTO_xxx.

Rename these macros in lib/libarchive/config_freebsd.h, to re-enable the
hashes for libarchive again.  This affects the mtree format writer, and
the xar format reader and writer modules.

This also requires changes in the library order for statically linking
rescue, otherwise ld would complain about redefined symbols.  Thanks to
jkim for pointing out the solution.

Reviewed by:	kientzle
MFC after:	1 week
2014-07-26 15:33:20 +00:00
..
librescue Use src.opts.mk in preference to bsd.own.mk except where we need stuff 2014-05-06 04:22:01 +00:00
rescue In r232153, libarchive 3.0.3 was imported, replacing the archive_hash.h 2014-07-26 15:33:20 +00:00
Makefile
README

The /rescue build system here has three goals:

1) Produce a reliable standalone set of /rescue tools.

The contents of /rescue are all statically linked and do not depend on
anything in /bin or /sbin.  In particular, they'll continue to
function even if you've hosed your dynamic /bin and /sbin.  For
example, note that /rescue/mount runs /rescue/mount_nfs and not
/sbin/mount_nfs.  This is more subtle than it looks.

As an added bonus, /rescue is fairly small (thanks to crunchgen) and
includes a number of tools (such as gzip, bzip2, vi) that are not
normally found in /bin and /sbin.

2) Demonstrate robust use of crunchgen.

These Makefiles recompile each of the crunchgen components and include
support for overriding specific library entries.  Such techniques
should be useful elsewhere.  For example, boot floppies could use this
to conditionally compile out features to reduce executable size.

3) Produce a toolkit suitable for small distributions.

Install /rescue on a CD or CompactFlash disk, and symlink /bin and
/sbin to /rescue to produce a small and fairly complete FreeBSD
system.

These tools have one big disadvantage: being statically linked, they
cannot use some advanced library functions that rely on dynamic
linking.  In particular, nsswitch, locales, and pam are likely to all
rely on dynamic linking in the near future.


To compile:

# cd /usr/src/rescue
# make obj
# make
# make install

Note that rebuilds don't always work correctly; if you run into
trouble, try 'make clean' before recompiling.

$FreeBSD$