$ make gcc -O2 -fomit-frame-pointer -Wall -static -mno-cygwin kpack.c shrink.c -o kpack shrink.c: In function `InitRep': shrink.c:433: warning: implicit declaration of function `bzero' shrink.c: In function `DoHuffCompression': shrink.c:948: warning: operation on `OutputOffs' may be undefined