How to properly separate argument list and pattern?

[stephane-archer]

with rg -F "-cpus=" I have the following error message error: Found argument '-=' which wasn't expected, or isn't valid in this context but -cpus= is the pattern I look for.
How to tell rg that the last "argument" is actually the pattern I look for?

[BurntSushi]

From the man page:

       PATTERN
           A regular expression used for searching. To match a pattern beginning with a dash, use the
           -e/--regexp option.

So, rg -F -e -cpus=.

Alternatively, you can use the standard Unix convention of -- to signal an end to non-positional arguments. So, rg -F -- -cpus=.