maint: rename cruft/ directory to external/ * liboctave/external: Renamed from liboctave/cruft. * * configure.ac: Rename XTRA_CRUFT_SH_LDFLAGS to XTRA_EXTERNAL_SH_LDFLAGS. Rename CRUFT_DLL_DEFS to EXTERNAL_DLL_DEFS. * install.txi: Update documentation to refer to liboctave/external. * HACKING: Update explanation of directory tree. * liboctave/module.mk: Update build system to include liboctave/external * liboctave/numeric/module.mk: Update CPPFLAGS to find Faddeeva in external/ directory. * lo-blas-proto.h, lo-lapack-proto.h: Update comments which referred to cruft directory.

      subroutine xddot (n, dx, incx, dy, incy, retval)
      double precision ddot, dx(*), dy(*), retval
      integer n, incx, incy
      retval = ddot (n, dx, incx, dy, incy)
      return
      end