a /usr/src/linux-1.3.69/arch/i386/lib/lib.a -o vmlinux
ld: warning: cannot find entry symbol _start; defaulting to 000fffe0
nm vmlinux | grep -v '\(compiled\)\|\(\.o$\)\|\( a \)' | sort > System.map
make[1]: Entering directory `/usr/src/linux-1.3.69/arch/i386/boot'
make[2]: Entering directory `/usr/src/linux-1.3.69/arch/i386/boot/compressed'
./xtract /usr/src/linux-1.3.69/vmlinux | gzip -9 | ./piggyback > piggy.o
Non-GCC header of 'system'
Compressed size 20.
ld -qmagic -Ttext 0xfe0 -o vmlinux head.o misc.o piggy.o
ld: warning: cannot find entry symbol _start; defaulting to 00000fe0
misc.o(.text+0x1eac): undefined reference to `input_data'
misc.o(.text+0x1eb1): undefined reference to `input_len'
misc.o(.text+0x1ec7): undefined reference to `input_data'
make[2]: *** [vmlinux] Error 1
make[2]: Leaving directory `/usr/src/linux-1.3.69/arch/i386/boot/compressed'
make[1]: *** [compressed/vmlinux] Error 2
make[1]: Leaving directory `/usr/src/linux-1.3.69/arch/i386/boot'
make: *** [zImage] Error 2