sudo apt-get install build-essential && sudo apt-get build-dep yaboot && apt-get source yaboot && cd yaboot-* && debian/rules build
fails in the linking part
ld -Ttext 0x200000 -Bstatic -melf32ppclinux second/crt0.o second/yaboot.o second/cache.o second/prom.o second/file.o second/partition.o second/fs.o second/cfg.o second/setjmp.o second/cmdline.o second/fs_of.o second/fs_ext2.o second/fs_iso.o second/iso_util.o lib/nonstd.o lib/nosys.o lib/string.o lib/strtol.o lib/vsprintf.o lib/ctype.o lib/malloc.o lib/strstr.o second/md5.o second/fs_xfs.o second/fs_reiserfs.o -lext2fs `gcc -m32 -print-libgcc-file-name` -o second/yaboot
/usr/lib/powerpc-linux-gnu/libext2fs.a(mmp.o): In function `ext2fs_mmp_read':
(.text+0xf8): undefined reference to `open'
/usr/lib/powerpc-linux-gnu/libext2fs.a(mmp.o): In function `ext2fs_mmp_read':
(.text+0x158): undefined reference to `read'
/usr/lib/powerpc-linux-gnu/libext2fs.a(mmp.o): In function `ext2fs_mmp_write':
(.text+0x200): undefined reference to `gettimeofday'
/usr/lib/powerpc-linux-gnu/libext2fs.a(mmp.o): In function `ext2fs_mmp_reset':
(.text+0x370): undefined reference to `gethostname'
...
There is already a patch e2fs-missing-libc.patch "Provide missing libc functions required by e2fslibs." but I suspect a newer e2fslibs has created more problems.
This is reported upstream in http://