[glibc] linux: use statx for fstat if neither newfstatat nor fstatat64 is present

[glibc] linux: use statx for fstat if neither newfstatat nor fstatat64 is present

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=e6547d635b991651600fab31f788ed5facd77610

commit e6547d635b991651600fab31f788ed5facd77610
Author: WANG Xuerui <git@xen0n.name>
Date:   Wed Jun 1 10:12:28 2022 +0800

    linux: use statx for fstat if neither newfstatat nor fstatat64 is present
    
    LoongArch is going to be the first architecture supported by Linux that
    has neither fstat* nor newfstatat [1], instead exclusively relying on
    statx. So in fstatat64's implementation, we need to also enable statx
    usage if neither fstatat64 nor newfstatat is present, to prepare for
    this new case of kernel ABI.
    
    [1]: https://lore.kernel.org/all/20220518092619.1269111-1-chenhuacai@loongson.cn/
    
    Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

Diff:
---
 sysdeps/unix/sysv/linux/fstatat64.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sysdeps/unix/sysv/linux/fstatat64.c b/sysdeps/unix/sysv/linux/fstatat64.c
index 2ab914380d..8b1a1a290d 100644
--- a/sysdeps/unix/sysv/linux/fstatat64.c
+++ b/sysdeps/unix/sysv/linux/fstatat64.c
@@ -42,7 +42,8 @@ _Static_assert (sizeof (__blkcnt_t) == sizeof (__blkcnt64_t),
 
 #if (__WORDSIZE == 32 \
      && (!defined __SYSCALL_WORDSIZE || __SYSCALL_WORDSIZE == 32)) \
-     || defined STAT_HAS_TIME32
+     || defined STAT_HAS_TIME32 \
+     || (!defined __NR_newfstatat && !defined __NR_fstatat64)
 # define FSTATAT_USE_STATX 1
 
 static inline int