Question on howto-write-a-block

GNU Radio
1

Hi All,

I am building a signal processing block following the tutorial under the
directory /gnuradio/gr-howto-write-a-block, say ‘howto_code’ block. I’ve
created howto_code.h and howto_code.cc file under
/gnuradio/gr-howto-write-a-block/src/lib, meanwhile, I modified howto.i
and
Makefile.am in the same directory.

Then, under the directory /gnuradio/gr-howto-write-a-block, I run
./bootstrap
./configure
make
I got error said “/usr/bin/swig -c++ -fvirtual -python -modern
-I/usr/local/include/gnuradio/swig -I/usr/local/include/gnuradio -module
howto -o howto.cc …/…/src/lib/howto.i
howto_addcode.h
/bin/bash: howto_code.h: command not found”

Can anyone advise me how to fix it? What should be the problem?

Thanks in advance,
Brook

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2

Brook,

I’d guess its an error in one of the modifications to Makefile.am –
have
you put a \ at the end of the preceding line? i.e it should be something
like:

grinclude_HEADERS =
howto_square_ff.h
howto_square2_ff.h
howto_code.h

lib_LTLIBRARIES = libgnuradio-howto.la

libgnuradio_howto_la_SOURCES =
howto_square_ff.cc
howto_square2_ff.cc
howto_code.cc

It looks like its trying to execute howto_code.h (from your path) rather
than adding it to the relevant enviroment variable.

Cheers,

Tim

3

Yes, Tim. It works now. Thanks so much.
-Brook

Tim P.-2 wrote:

howto_code.h

directory /gnuradio/gr-howto-write-a-block, say ‘howto_code’ block. I’ve
-I/usr/local/include/gnuradio/swig -I/usr/local/include/gnuradio -module
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