You must build it first:

Step1)  execute "configure"
Step2)  execute "make install"

...

--INSTALL--
The simplest way to compile this package is:

  1. `cd' to the directory containing the package's source 
code and type
     `./configure' to configure the package for your 
system.  If you're
     using `csh' on an old version of System V, you might 
need to type
     `sh ./configure' instead to prevent `csh' from trying 
to execute
     `configure' itself.

     Running `configure' takes awhile.  While running, it 
prints some
     messages telling which features it is checking for.

  2. Type `make' to compile the package.

  3. Optionally, type `make check' to run any self-tests 
that come with
     the package.

  4. Type `make install' to install the programs and any 
data files and
     documentation.

  5. You can remove the program binaries and object files 
from the
     source code directory by typing `make clean'.  To 
also remove the
     files that `configure' created (so you can compile 
the package for
     a different kind of computer), type `make 
distclean'.  There is
     also a `make maintainer-clean' target, but that is 
intended mainly
     for the package's developers.  If you use it, you may 
have to get
     all sorts of other programs in order to regenerate 
files that came
     with the distribution.