twopiradians

Hello,Many thanks,here it works good with : **sudo apt install git** at first... and the development libraries and tools here it's ok with any **sudo apt install libperl-dev libgtk-3-dev** and...

first install git for 18.04 LTS to 19.04 then folow what «pieqq» said up + install those development libraries and tools libpng-dev libjpeg-dev libgif-dev xsltproc docbook-xsl-ns libperl-dev libgtk-3-dev and valid...