create environment variable TXPP_HOME to point where
txpp is.
TXPP_HOME="/home/damitha/txpp"

export TXPP_HOME

Now
cd $TXPP_HOME/lib

to build

sh build.sh

This will install libtxpp.so in $TXPP_HOME/lib

To build and run the samples

set environment variable LD_LIBRARY_PATH to point to
TXPP_HOME/lib

LD_LIBRARY_PATH="$TXPP_HOME/lib:$LD_LIBRARY_PATH"

export LD_LIBRARY_PATH

cd $TXPP_HOME/examples

sh build_test1.sh
sh build_test2.sh

to run

sh run_test1.sh
sh run_test2.sh