XrdPosix fails to compile with glibc 2.33 (2.32.9000) #1315
Description
/builddir/build/BUILD/xrootd-5.0.2/src/XrdPosix/XrdPosix.cc: In function 'int XrdPosix_Fstat(int, stat*)':
/builddir/build/BUILD/xrootd-5.0.2/src/XrdPosix/XrdPosix.cc:379:27: error: '_STAT_VER' was not declared in this scope
379 | : Xunix.Fstat64(_STAT_VER, fildes, (struct stat64 *)buf));
| ^~~~~~~~~
/builddir/build/BUILD/xrootd-5.0.2/src/XrdPosix/XrdPosix.cc: In function 'int XrdPosix_Lstat(const char*, stat*)':
/builddir/build/BUILD/xrootd-5.0.2/src/XrdPosix/XrdPosix.cc:563:27: error: '_STAT_VER' was not declared in this scope
563 | ? Xunix.Lstat64(_STAT_VER, path, (struct stat64 *)buf)
| ^~~~~~~~~
/builddir/build/BUILD/xrootd-5.0.2/src/XrdPosix/XrdPosix.cc: In function 'int XrdPosix_Stat(const char*, stat*)':
/builddir/build/BUILD/xrootd-5.0.2/src/XrdPosix/XrdPosix.cc:891:26: error: '_STAT_VER' was not declared in this scope
891 | ? Xunix.Stat64(_STAT_VER, path, (struct stat64 *)buf)
| ^~~~~~~~~
In glibc 2.32 and earlier _STAT_VER is defined in /usr/include/sys/stat.h (which includes /usr/include/bits/stat.h). However, in glibc 2.33 this define is dropped. The headers no longer redirects the calls to the kernel functions, but there are implementations in glibc.
I do not know how to fix this, is it sufficient to do
#ifndef _STAT_VER
#define _STAT_VER <some value> /* What value? */
#endif
Or does it need morc complicates changes?