[PATCH] riscv: Fix fenv.h support

[Kito Cheng]

LGTM, I didn't notice that backwards compatible issue, thanks for fixing
that :)

Sebastian Huber <sebastian.huber@embedded-brains.de> 於 2023年10月12日 週四 03:06
寫道：

> Use the same C preprocessor expressions to define FE_RMODE_MASK and
> __RISCV_HARD_FLOAT.
>
> The problem was noticed on GCC 10 which does not define __riscv_f.
> ---
>  newlib/libc/machine/riscv/sys/fenv.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/newlib/libc/machine/riscv/sys/fenv.h
> b/newlib/libc/machine/riscv/sys/fenv.h
> index 1d577d527b..98387d2205 100644
> --- a/newlib/libc/machine/riscv/sys/fenv.h
> +++ b/newlib/libc/machine/riscv/sys/fenv.h
> @@ -14,7 +14,7 @@
>
>  #include <stddef.h>
>
> -#if defined(__riscv_f) || defined(__riscv_zfinx)
> +#if defined(__riscv_flen) || defined(__riscv_zfinx)
>
>  /* Per "The RISC-V Instruction Set Manual: Volume I: User-Level ISA:
>   * Version 2.1", Section 8.2, "Floating-Point Control and Status
> --
> 2.35.3
>
>
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