As per kba's comment, it will:
install development tools like compiler, linker, make and such
as referenced in this Stack Overflow answer: https://stackoverflow.com/a/37528215/4957508
The answer there says:
Please note that Solus is not based on Ubuntu, rather, it is built from scratch. Thus Ubuntu repos and package names are not applicable here.
The functional equivalent to "build-essential" on Solus is the system.devel component. To install it, issue the following command in your terminal:
sudo eopkg it -c system.devel
The answer and comments also point to the Solus Package Management wiki.
The wiki describes the
it parameter as being a shortcut for the
install command, which will "Install a specified package". I could not find any online documentation for the