New signal processing block


I am trying to write my own signal processing block. I copied
gr-howto-write-a-block folder and I tried to change all the places
with howto_… with my own package name and corresponding header,.i, and
files in gr_howto_… folder.
However when I cd to the folder and start with ./bootstrap then
I got

checking pkg-config is at least version 0.18… yes
checking for GNURADIO_CORE… configure: error: Package requirements
(gnuradio-core >= 3) were not met:

No package ‘gnuradio-core’ found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables
and GNURADIO_CORE_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.

this error although my gnuradio-core folder is contained in gnuradio
Also when I try to do “make” I got

make: *** No targets specified and no makefile found. Stop.

this error telling that there is no makefile. I could not figure out
what to
do. Also I am using GSL library in my .cc file. Where should I tell the
to link those specific libraries? such as -L/usr/local/lib -lgsl

Any help would be kindly appreciated.

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