nic0@nic0:~/john-1.6/src$ sudo make generic
rm -f arch.h
gcc -c -Wall -O2 -fomit-frame-pointer detect.c
gcc  detect.o -o detect
./best.sh "make" \
        "DES_fmt.o DES_std.o" \
        "MD5_std.o" \
        "BF_std.o"
Compiling: DES benchmark (code version #1)
make[1]: Entering directory `/home/nic0/john-1.6/src'
gcc -c -Wall -O2 -fomit-frame-pointer -funroll-loops DES_fmt.c
gcc -c -Wall -O2 -fomit-frame-pointer -funroll-loops DES_std.c
gcc  DES_bs.o DES_bs_b.o DES_fmt.o DES_std.o MD5_fmt.o MD5_std.o BF_fmt.o BF_std.o bench.o best.o common.o config.o formats.o memory.o misc.o params.o path.o signals.o tty.o -o bench
MD5_std.o: In function `MD5_std_crypt':
MD5_std.c:(.text+0x746): undefined reference to `MD5_body'
MD5_std.c:(.text+0x80c): undefined reference to `MD5_body'
MD5_std.c:(.text+0x82e): undefined reference to `MD5_body'
MD5_std.c:(.text+0x851): undefined reference to `MD5_body'
MD5_std.c:(.text+0x863): undefined reference to `MD5_body'
MD5_std.o:MD5_std.c:(.text+0x886): more undefined references to `MD5_body' follow
BF_std.o: In function `BF_std_crypt':
BF_std.c:(.text+0x362): undefined reference to `BF_current'
BF_std.c:(.text+0x376): undefined reference to `BF_current'
BF_std.c:(.text+0x3a8): undefined reference to `BF_current'
BF_std.c:(.text+0x3c5): undefined reference to `BF_current'
BF_std.c:(.text+0x3cc): undefined reference to `BF_current'
BF_std.o:BF_std.c:(.text+0x3d3): more undefined references to `BF_current' follow
BF_std.o: In function `BF_std_crypt':
BF_std.c:(.text+0x1030): undefined reference to `BF_body'
BF_std.c:(.text+0x1053): undefined reference to `BF_current'
BF_std.c:(.text+0x1059): undefined reference to `BF_current'
BF_std.c:(.text+0x105f): undefined reference to `BF_current'
BF_std.c:(.text+0x1065): undefined reference to `BF_current'
BF_std.c:(.text+0x106b): undefined reference to `BF_current'
BF_std.o:BF_std.c:(.text+0x1071): more undefined references to `BF_current' follow
BF_std.o: In function `BF_std_crypt':
BF_std.c:(.text+0x10be): undefined reference to `BF_body'
BF_std.c:(.text+0x10d8): undefined reference to `BF_current'
BF_std.c:(.text+0x10e2): undefined reference to `BF_current'
BF_std.c:(.text+0x10ec): undefined reference to `BF_current'
BF_std.c:(.text+0x10f6): undefined reference to `BF_current'
BF_std.c:(.text+0x1100): undefined reference to `BF_current'
BF_std.o:BF_std.c:(.text+0x110a): more undefined references to `BF_current' follow
collect2: ld returned 1 exit status
make[1]: *** [bench] Error 1
make[1]: Leaving directory `/home/nic0/john-1.6/src'
make: *** [generic.h] Error 1
nic0@nic0:~/john-1.6/src$

sudo apt-get update
sudo apt-get install john