To build and install this program:

./autogen.sh --prefix=/home/${USER}/.local
make install

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Running the first line above creates the following files:

aclocal.m4
autom4te.cache
config.log
config.status
configure
gtkrocketchat.desktop
install-sh
missing
Makefile.in
Makefile

Running "make install", installs the application in /home/${USER}/.local/bin
and installs the gtkrocketchat.desktop file in /home/${USER}/.local/share/applications

You can now run the application by typing "Hello World" in the Overview.

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To uninstall, type:

make uninstall

----------------
To create a tarball type:

make distcheck

This will create gtkrocketchat-1.0.tar.xz

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https://worldvectorlogo.com/logo/rocketchat