Add renameat2 function [BZ #17662]

The implementation falls back to renameat if renameat2 is not available
in the kernel (or in the kernel headers) and the flags argument is zero.
Without kernel support, a non-zero argument returns EINVAL, not ENOSYS.
This mirrors what the kernel does for invalid renameat2 flags.

1 files changed, 3 insertions, 0 deletions

diff --git a/stdio-common/Versions b/stdio-common/Versions
index 5016f69c20..b8217578c8 100644
--- a/stdio-common/Versions
+++ b/stdio-common/Versions
@@ -57,6 +57,9 @@ libc {
     psiginfo;
     register_printf_modifier; register_printf_type; register_printf_specifier;
   }
+  GLIBC_2.28 {
+    renameat2;
+  }
   GLIBC_PRIVATE {
     # global variables
     _itoa_lower_digits;