For SH cpu, m2a valiants has been supported since r85286. But, at least sh2a, sh2a-single, sh2a-single-only, and sh2a-nofpu found in gcc/config/sh/sh.opt are not documented in gcc/doc/invoke.texi .
-- Summary: SH: m2a* options not docmented. Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: target AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: yoshii dot takashi at renesas dot com GCC target triplet: sh*-*-* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40515