Thanks. The patch you offered is not accepted by patch when running against current master. I made the changes by hand and I got:
...
GMPDIR=gmp4
PARGCLDIR=
X_LIBS= -lX11
X_CFLAGS=
PROCESSOR_FLAGS=
EXTRA_LOBJS=
LEADING_UNDERSCORE=
GNU_LD=1
AWK=gawk
address@hidden@
address@hidden@
PATHNAME_BUG=t
add-defs1 amd64-linux
using amd64-linux.defs
if the 'unknown' directories exist you may provide
a second argument to ./add-defs of a local directory where things might be,
or edit ./add-defs so that it can find them. Otherwise just continue
and the portions with unknown will not be compiled.
Thanks.