loading idea and rsa extensions

[Gamma Pi]

I wish to use the idea and rsa extensions. I compiled idea.c and rsa.c
from the gnupg.org ftp site as from the compilation instructions in
the source, copied idea and rsa in /usr/local/lib/gnupg (default,
never changed), added load-extension rsa and load-extension idea in
.gnupg, and it does not work. gpg --version does not see the new
modules. I read all the related posts I found on the mailing list
archives, as far as I can tell I did everything right, but does not
work. Any help?