The new Modules/attr.c does not compile on Mac OS X (and probably others):
gcc -c -I.  -DHAVE_CONFIG_H -DMODULE -Wall -Wmissing-prototypes -O2
-fno-common -o attr..o attr.c
attr.c: In function 'bin_getattr':
attr.c:45: error: too few arguments to function 'listxattr'
attr.c:46: error: too few arguments to function 'getxattr'
attr.c: In function 'bin_setattr':
attr.c:70: error: too few arguments to function 'setxattr'
attr.c: In function 'bin_delattr':
attr.c:84: error: too few arguments to function 'removexattr'
attr.c: In function 'bin_listattr':
attr.c:99: error: too few arguments to function 'listxattr'