The "sold" linker is a commercial version of the mold linker. Unlike the mold linker whose license is AGPL, the sold linker is available under an ordinary, per-user, per-month/year commercial license. sold is a superset of mold; in addition to all the mold's features, sold supports macOS/iOS.
Please see the End User Agreement License for the details about licensing terms. You can purchase a subscription or obtain an evaluation license at our website.
The build instruction for sold is the same as for mold except that you check
out https://github.com/bluewhalesystems/sold.git instead of
https://github.com/rui314/mold.git. For the details, please see
https://github.com/rui314/mold#how-to-build.
The sold linker is installed as ld.sold as well as ld.mold. Therefore,
the instructions to use sold is the same as the mold linker. For the details,
refer the mold's README.