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ff6b71c2b2
Ideally we'd be able to use LDADD_foo here for all our various libs and get the implicit dependencies, but rescue is a bit special. Historically this was just used to pick up the "private" in the name automatically (as far as I can tell), but now that _DP_pthread includes c we end up pulling in a -lc from this (along with -lcompiler_rt and -lsys). This results in -lc being before -lmd (and after, implictly, from the compiler driver), which, for the specific situation here, results in both libc.a's and libmd.a's md5c.o being included, giving duplicate definitions of _libmd_MD5Init and other symbols. With LLD 16+ we currently make that not an error for other reasons (which should probably be fixed), but not for older versions, nor for BFD, and so the build fails. Fix all this by just using -lprivatezstd in place of LDADD_zstd, which results in the exact same clang command line as we used to have prior to adding c (and sys) to _DP_pthread when linking rescue. Note that bsdbox already uses -lprivatezstd rather than LDADD_zstd. This reverts commit |
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| librescue | ||
| rescue | ||
| 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. 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 all rely on dynamic linking. 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.