[Help-gsl] cvs version installation question

[kdsfinger]

hi, there
I am trying to install the cvs version of the gsl but got the
following message when

./autogen.sh
blas/Makefile.am:1: Libtool library used but `LIBTOOL' is undefined
blas/Makefile.am:1:   The usual way to define `LIBTOOL' is to add
`AC_PROG_LIBTOOL'
blas/Makefile.am:1:   to `configure.ac' and run `aclocal' and `autoconf' again.
blas/Makefile.am:1:   If `AC_PROG_LIBTOOL' is in `configure.ac', make sure
blas/Makefile.am:1:   its definition is in aclocal's search path.
....

I have libtool installed

 libtool --version
ltmain.sh (GNU libtool) 2.2.2
Written by Gordon Matzigkeit <address@hidden>, 1996

Copyright (C) 2008 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

The AC_PROG_LIBTOOL is in configure.ac

How can I fix the problem? what should I do "to make sure its
definition is in aclocal's search path"? Thanks for help.

zl2k