gnupg 1.4.11 -- build failed on Lion with default compiler

[eric@…]

While trying to install duplicity I ran into problems. From the errors I tracked this down to gnupg and here's the offending command:

/usr/bin/cc  -pipe -O2 -m64 -Wall -Wno-pointer-sign  -L/opt/local/lib -L/opt/local/lib -L/opt/local/lib -L/opt/local/lib -L/opt/local/lib -o mpicalc mpicalc.o ../cipher/libcipher.a ../mpi/libmpi.a ../util/libutil.a  -liconv -lintl -liconv -lc  -Wl,-framework -Wl,CoreFoundation   
ld: duplicate symbol _mpihelp_add_1 in ../mpi/libmpi.a(mpi-bit.o) and ../mpi/libmpi.a(mpiutil.o) for architecture x86_64

Fixed using

port clean gnupg

then using the alternative compiler specified here: ​http://trac.macports.org/wiki/ProblemHotlist#xcode43