Selects the ABI, which is either "ilp32" or "lp64", optionally followed
by "f", "d", or "q" to indicate single-precision, double-precision, or
quad-precision floating-point calling convention, or none to indicate
-the soft-float calling convention.
+the soft-float calling convention. Also, "ilp32" can optionally be followed
+by "e" to indicate the RVE ABI, which is always soft-float.
@cindex @samp{-mrelax} option, RISC-V
@item -mrelax