rsa.c, idea.c compiler error

[Bjoern Appel]

Hello,
i would like to use old PGP 2.x keys with GNUPG.
I downloaded the modules from the contrib-directory and compiled them as
described in the HOWTOs:

gcc -Wall -O2 -shared -fPIC -o idea idea.c
gcc -Wall -O2 -shared -fPIC -o rsa  rsa.c


I get the error message
"idea.c:120: Invalid token in expression"
"rsa.c:49: Invalid token in expression"

I use gcc 2.7.2.1 on a Linux 2.0.35

Can you tell me, how I can solve this problem?

Bjoern Appel