Problem linking libecpg.5.3.dylib on OS X

I'm seeing the following on cuckoo:

gcc -pipe -no-cpp-precomp -O2 -Wall -Wmissing-prototypes -Wpointer-arith
-Winline -Wdeclaration-after-statement -Wendif-labels
-fno-strict-aliasing -g   -dynamiclib -install_name
/Users/buildfarm/buildfarm/HEAD/inst/lib/libecpg.5.dylib
-compatibility_version 5 -current_version 5.3  -multiply_defined
suppress  execute.o typename.o descriptor.o data.o error.o prepare.o
memory.o connect.o misc.o path.o  thread.o -L../pgtypeslib
-L../../../../src/interfaces/libpq -L../../../../src/port
-L/opt/local/lib -lpgtypes -lpq -lm  -o libecpg.5.3.dylib
ld: Undefined symbols:
_ecpg_internal_regression_mode
/usr/bin/libtool: internal link edit command failed
make[4]: *** [libecpg.5.3.dylib] Error 1

http://lnk.nu/pgbuildfarm.org/cxd.pl 

Any suggestions? Google and the archives aren't turning anything up :(
-- 
Jim Nasby                                            jim@nasby.net
EnterpriseDB      http://enterprisedb.com      512.569.9461 (cell)