The libtool creates "libffi.dylib" and "libffi.5.dylib" but not "libffi.5.0.9.dylib". Having it in libffi_DYNAMIC_LIBS causes an infinite makefile loop.
else
libffi_DYNAMIC_PROG =
ifeq "$(darwin_TARGET_OS)" "1"
-libffi_DYNAMIC_LIBS = libffi/dist-install/build/libffi$(soext) libffi/dist-install/build/libffi.5$(soext) libffi/dist-install/build/libffi.5.0.9$(soext)
+libffi_DYNAMIC_LIBS = libffi/dist-install/build/libffi$(soext) \
+ libffi/dist-install/build/libffi.5$(soext)
else
libffi_DYNAMIC_LIBS = libffi/dist-install/build/libffi.so \
libffi/dist-install/build/libffi.so.5