libselinux: LFS support should be enabled by default

[samsam2310]

There is a old mail thread discussed about the LFS support (i.e. _FILE_OFFSET_BITS=64). It was rejected because fts.h didn't support it.

After this glibc commit, fts.h now supports LFS. I think we could consider enable the flags by default in libselinux so they can work on files greather than 2.1GB on 32bit platform.

[thesamesam]

The use of lstat64 at

selinux/libselinux/src/selinux_restorecon.c

Line 453 in 89dd980

ret = lstat64(fl->file, &sb);

currently causes issues for musl-1.2.4 too.

Switching to LFS and switching to lstat would solve two problems for the price of one.

See also https://bugs.gentoo.org/905711.

[thesamesam]

See also https://lore.kernel.org/selinux/[email protected]/. cc @vorlonofportland.