In three places, sysdeps/unix/sysv/linux/hppa/nptl/bits/pthreadtypes.h uses __attribute__ ((aligned(16))); that should be __aligned__ since "aligned" is in the user's namespace.
i fixed this here: https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=243cc404ca2fca24bd3f78d9bc6fda417896d1f7