I noticed this compiling 2.0.33. I don't know if it's important or not.
fomit-frame-pointer -fno-strength-reduce -pipe -m486 -malign-loops=2 -malign-jumps=2 -malign-functions=2 -DCPU=586 -DCONFIG_SMB_NT4 -c -o ip_forward.o ip_forward.c ip_forward.c: In function `ip_forward': ip_forward.c:326: warning: `portptr' might be used uninitialized in this function