I am concern about we didn't define POINTERS_EXTEND_UNSIGNED here, and
also concern about the code model stuffs, I know currently Guo-Ren's
implementation is rely on some MMU trick, but I am not sure does it
also applicable on embedded applications.
> diff --git a/gcc/config/riscv/linux.h b/gcc/config/riscv/linux.h
> index b9557a75dc7..4f33c88ef6e 100644
> --- a/gcc/config/riscv/linux.h
> +++ b/gcc/config/riscv/linux.h
> @@ -58,7 +58,7 @@ along with GCC; see the file COPYING3. If not see
> "%{mabi=ilp32:_ilp32}"
>
> #define LINK_SPEC "\
> --melf" XLEN_SPEC DEFAULT_ENDIAN_SPEC "riscv" LD_EMUL_SUFFIX " \
> +-melf" ABI_LEN_SPEC DEFAULT_ENDIAN_SPEC "riscv" LD_EMUL_SUFFIX " \
> %{mno-relax:--no-relax} \
> %{mbig-endian:-EB} \
> %{mlittle-endian:-EL} \
> diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
> index 5f44f6dc5c9..09ab940447d 100644
> --- a/gcc/config/riscv/riscv.cc
> +++ b/gcc/config/riscv/riscv.cc
> @@ -6291,10 +6291,6 @@ riscv_option_override (void)
> && riscv_abi != ABI_LP64 && riscv_abi != ABI_ILP32E)
> error ("z*inx requires ABI ilp32, ilp32e or lp64");
>
> - /* We do not yet support ILP32 on RV64. */
> - if (BITS_PER_WORD != POINTER_SIZE)
> - error ("ABI requires %<-march=rv%d%>", POINTER_SIZE);
It seems to also make -march=rv32g -mabi=lp64 become acceptable?
>
