autoconf-el from home:Sauerland:Graphics project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Sauerland:Graphics/openSUSE_Tumbleweed/home:Sauerland:Graphics.repo zypper refresh zypper install autoconf-el