1; Test unsupported ARCH in -march=ARCH, where there's an option
2; which is a proper substring.
3; { dg-do assemble }
4; { dg-options "--march=v10_v32" }
5; { dg-error ".* invalid <arch> in --march=<arch>: v10_v32" "" { target cris-*-* } 0 }
6 nop
7