Problem: how to write a signal processing block

I have read this website that teaches us how to write our own signal
processing block.

WEBSITE:
http://www.gnu.org/software/gnuradio/doc/howto-write-a-block.html

I tried using the autotools like autoconf, automake and aclocal since I
would like to “rewrite” the configure (the executable and not the
configure.ac). I did this since I intend to write my own signal
processing
block for use with the GNU Radio.

And so I ran aclocal autoconf and automake respectively. Then I ran the
configure script. Unfortunately, upon “make checking” (as in invoking
the
command MAKE CHECK) I always encounter this error message saying that:

*** No rule to make target /swig/gnuradio.i', needed by howto.cc’.
Stop.

How do I circumvent this? What do I need to do?
Note that I did not change ANYTHING from files. I just sort of “rebuilt”
it.

Could somebody please reply ASAP. Thanks!

The complete error messages follow:

jpgacrama@jpgacrama-laptop:~/gr-howto-write-a-block-3.1.1$ sudo make
check
Making check in config
make[1]: Entering directory
/home/jpgacrama/gr-howto-write-a-block-3.1.1 /config' make[1]: Nothing to be done for check’.
make[1]: Leaving directory /home/jpgacrama/gr-howto-write-a-block-3.1.1 /config' Making check in src make[1]: Entering directory /home/jpgacrama/gr-howto-write-a-block-3.1.1
/src’
Making check in lib
make[2]: Entering directory
/home/jpgacrama/gr-howto-write-a-block-3.1.1 /src/lib' make[2]: *** No rule to make target /swig/gnuradio.i’, needed by
howto.cc'. Stop. make[2]: Leaving directory /home/jpgacrama/gr-howto-write-a-block-3.1.1
/src/lib’
make[1]: *** [check-recursive] Error 1
make[1]: Leaving directory `/home/jpgacrama/gr-howto-write-a-block-3.1.1
/src’
make: *** [check-recursive] Error 1