Ubuntu Procedures

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Install libmodbus:
uninstall the previous verision (aptitude)
download and upack tarball

*** if installing to a VM, install to a directory in the guest filesystem (VMWare may not support symlinks in shared directories (e.g. host filesystem).

./autogen.sh
./configure
make
sudo make install
ldconfig (applications may not be able to find new lib until ldconfig is run)

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Find installed library version

sudo pkg-config --modversion <library name>
sudo pkg-config --modversion libmodbus

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List installed libraries

sudo ldconfig -p