New comment by abenson on void-packages repository https://github.com/void-linux/void-packages/pull/22496#issuecomment-636948913 Comment: From the `INSTALL` document: --with-ngshared This option let you compile ngspice as a shared library or dll, allowing an application controlling ngspice. This option excludes using --with-x or --with-wingui. Useful additional options are --enable-xspice --enable-cider --enable-openmp. No graphics inetrface is provided, this has to be handled by the controlling application. I'm not sure why these are mutually exclusive.