You need to be more careful, Vincenzo. The space between = and " is wrong. There mustn't be any space. It should be:

cmake -DCMAKE_INSTALL_PREFIX="/usr/local/" ../

Best regards,
Marcus

On 31/08/2020 20.18, Vincenzo Mone wrote:
Hi Marcus,
thanks for your reply.
I gave the command:

gnuradio-config-info --prefix

and got :

/usr/local

So I have tried to give the command:

cmake -DCMAKE_INSTALL_PREFIX= "/usr/local/" ../

- Checking for module 'mpir >= 3.0'
--   No package 'mpir' found
-- Could NOT find MPIR (missing: MPIRXX_LIBRARY MPIR_LIBRARY MPIR_INCLUDE_DIR)
-- User set python executable /usr/bin/python3
-- Found PythonLibs: /usr/lib/x86_64-linux-gnu/libpython3.8.so (found suitable exact 
version "3.8.2")
-- Found ALSA 1.2.2
-- Found jack: /usr/lib/x86_64-linux-gnu/libjack.so
-- Extracting version information from git describe...
-- System Hidapi will be used


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