gcc/testsuite/gcc.target/riscv/arch-12.c

/* { dg-do compile } */
/* { dg-options "-O2 -march=rv64im1p2p3 -mabi=lp64" } */
int foo() {}
/* { dg-error "'-march=rv64im1p2p3': For 'm1p2p\\?', version number with more than 2 level is not supported." "" { target *-*-* } 0 } */