Extended attribute support was added in issue 12720. Doesn't compile on kfreebsd/debian, which uses eglibc and gcc. The error is that the symbols XATTR_LIST_MAX and XATTR_SIZE_MAX are not defined.

After http://hg.python.org/cpython/rev/f325439d7f84 xattr compilation tests for 'defined(HAVE_SYS_XATTR_H) && defined(__GLIBC__)', but in this case this test doesn't work. Anyway, XATTR_SIZE_MAX is defined (on Linux) in <linux/limits.h>, and <sys/xattr.h> doesn't know anything about it.

(When defined XATTR_{SIZE,LIST}_MAX to 65536 like on linux to go through with the compilation, and os.listxattr('/') returns 'OSError: [Errno 78] Function not implemented'...)