Broken RISC-V code in newlib

[Eric Salem]

Hi Kito,

On 3/25/25 9:23 AM, Kito Cheng wrote:
> Hi Eric:
> 
>> diff --git a/newlib/libc/machine/riscv/sys/asm.h b/newlib/libc/machine/riscv/sys/asm.h
>> index 0a354b220517..a9792e964ebc 100644
>> --- a/newlib/libc/machine/riscv/sys/asm.h
>> +++ b/newlib/libc/machine/riscv/sys/asm.h
>> @@ -12,7 +12,9 @@
>>  #ifndef _SYS_ASM_H
>>  #define _SYS_ASM_H
>>
>> +#if !__ASSEMBLER__
>>  #include <stdint.h>
>> +#endif
>>
>>  /*
>>   * Macros to handle different pointer/register sizes for 32/64-bit code
>> @@ -22,13 +24,17 @@
>>  # define SZREG 8
>>  # define REG_S sd
>>  # define REG_L ld
>> +#if !__ASSEMBLER__
>>  typedef uint64_t uintxlen_t;
>> +#endif
>>  #elif __riscv_xlen == 32
>>  # define PTRLOG 2
>>  # define SZREG 4
>>  # define REG_S sw
>>  # define REG_L lw
>> +#if !__ASSEMBLER__
>>  typedef uint32_t uintxlen_t;
>> +#endif
>>  #else
>>  # error __riscv_xlen must equal 32 or 64
>>  #endif
> 
> Seems like sys/asm.h is not the right place to put those C typedef and
> also including #include <stdint.h>
> 
> Could you just create a xlenint.h in newlib/libc/machine/riscv/ then
> include that by #include "xlenint.h" in those places you want to use?
> 
> Since uintxlen_t is not defined in either standard C or RISC-V
> conventions, so I would like to prevent exposing that to users if
> possible :)

Sure, I can do that.

I think the system headers must be getting included in my case, and the local
headers in Jeff's case, because I don't see how else I wouldn't be getting the
compilation errors.

Eric