In uClibc almost all architectures uses their own kernel_stat.h header, so i follow this way. Also we have to handle what time_t we use - 32bit or 64bit and make time structures in kernel_stat structure in accordance with this.
For other architectures (ARM, PPC, MIPS, xtensa) we already use the same scheme. These are the arguments to use the solution that I implemented :)

чт, 29 февр. 2024 г. в 00:03, Stafford Horne <shorne@gmail.com>:
On Wed, Feb 28, 2024 at 11:46:09AM +0300, Dmitry Chestnykh wrote:
> Signed-off-by: Dmitry Chestnykh <dm.chestnykh@gmail.com>
> ---
>  extra/Configs/Config.in                       |  1 +
>  libc/sysdeps/linux/or1k/bits/kernel_stat.h    | 37 +++++++++++++++++++
>  .../linux/or1k/bits/uClibc_arch_features.h    |  3 --
>  3 files changed, 38 insertions(+), 3 deletions(-)
>  create mode 100644 libc/sysdeps/linux/or1k/bits/kernel_stat.h
>
> diff --git a/extra/Configs/Config.in b/extra/Configs/Config.in
> index c7c502040..ded1f72c9 100644
> --- a/extra/Configs/Config.in
> +++ b/extra/Configs/Config.in
> @@ -1028,6 +1028,7 @@ config UCLIBC_USE_TIME64
>       bool "Use *time64 syscalls instead of 32bit ones (if possible)"
>       depends on TARGET_arm                            || \
>                  (TARGET_mips && !CONFIG_MIPS_N64_ABI) || \
> +                TARGET_or1k                           || \
>                  TARGET_powerpc                        || \
>                  TARGET_xtensa
>       # TODO: add support for other architectures
> diff --git a/libc/sysdeps/linux/or1k/bits/kernel_stat.h b/libc/sysdeps/linux/or1k/bits/kernel_stat.h
> new file mode 100644
> index 000000000..cec44ecfc
> --- /dev/null
> +++ b/libc/sysdeps/linux/or1k/bits/kernel_stat.h
> @@ -0,0 +1,37 @@
> +#ifndef _BITS_STAT_STRUCT_H
> +#define _BITS_STAT_STRUCT_H
> +
> +#if defined(__UCLIBC_USE_TIME64__)
> +#include "internal/time64_helpers.h"
> +#endif
> +
> +struct kernel_stat {
> +     unsigned long   st_dev;         /* Device.  */
> +     unsigned long   st_ino;         /* File serial number.  */
> +     unsigned int    st_mode;        /* File mode.  */
> +     unsigned int    st_nlink;       /* Link count.  */
> +     unsigned int    st_uid;         /* User ID of the file's owner.  */
> +     unsigned int    st_gid;         /* Group ID of the file's group. */
> +     unsigned long   st_rdev;        /* Device number, if device.  */
> +     unsigned long   __pad1;
> +     long            st_size;        /* Size of file, in bytes.  */
> +     int             st_blksize;     /* Optimal block size for I/O.  */
> +     int             __pad2;
> +     long            st_blocks;      /* Number 512-byte blocks allocated. */
> +#if defined(__UCLIBC_USE_TIME64__)
> +     struct __ts32_struct __st_atim32;
> +     struct __ts32_struct __st_mtim32;
> +     struct __ts32_struct __st_ctim32;
> +#else
> +     struct timespec st_atim;
> +     struct timespec st_mtim;
> +     struct timespec st_ctim;
> +#endif
> +     unsigned int    __unused4;
> +     unsigned int    __unused5;
> +};
> +
> +#define kernel_stat64        kernel_stat
> +
> +#endif       /* _BITS_STAT_STRUCT_H */
> +

Why is this struct needed for openrisc? It looks like something that is common
and could be shared/imported?

> diff --git a/libc/sysdeps/linux/or1k/bits/uClibc_arch_features.h b/libc/sysdeps/linux/or1k/bits/uClibc_arch_features.h
> index a9560b0b9..e11e71f88 100644
> --- a/libc/sysdeps/linux/or1k/bits/uClibc_arch_features.h
> +++ b/libc/sysdeps/linux/or1k/bits/uClibc_arch_features.h
> @@ -14,9 +14,6 @@
>  /* can your target use syscall6() for mmap ? */
>  #define __UCLIBC_MMAP_HAS_6_ARGS__
> 
> -/* does your target use statx */
> -#undef __UCLIBC_HAVE_STATX__
> -
>  /* does your target have a broken create_module() ? */
>  #undef __UCLIBC_BROKEN_CREATE_MODULE__
> 
> --
> 2.44.0
>