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