bug#11456: guile-2.0.5.210-e1fb0e don't know libffi

[gnuemacser]

i take the advice of this message   and download the newest guile-2.0.5.210-e1fb0e to build ,
using the same way i mentioned in the bugreport before.
when i configure it by
../configure --without-threads
it stops here

checking how to link with libgmp... -lgmp
checking whether libunistring was built with iconv support... yes
../configure: line 42537: syntax error near unexpected token `LIBFFI,'
../configure: line 42537: `PKG_CHECK_MODULES(LIBFFI, libffi)'

i googled and use
autoreconf -re
not works

i use
autoreconf -iv
still not works