From the Debian BTS:
cat ../../checks/../doc/HACKING \ ../../checks/../doc/DETAILS \ ../../checks/../doc/FAQ >plain-large ../g10/gpg --homedir . --quiet --yes --no-permission-warning --import
../../checks/pubdemo.asc
The attached patch adds '--disable-asm' to CONFARGS in debian/rules. With this patch 'gnupg' can be compiled on ppc64.
All distros seem to have this problem at least since 1.4.2.