[aarch64] question about user.h, ucontext.h, procfs.h

[Szabolcs Nagy]

* Mike Frysinger <vapier@gentoo.org> [2015-04-23 16:13:10 -0400]:
> On 23 Apr 2015 14:46, Szabolcs Nagy wrote:
> > > 
> > > aarch64 user_fpsimd_struct has
> > > 
> > >   __uint128_t vregs[32];
> > > 
> > > member to represent the 128bit floating point registers
> > > 
> > > is it ok to expose __uint128_t in public headers?
> > 
> > (i'd prefer 'long double' so compilers without __uint128
> > can use signal.h)
> 
> vregs is supposed to hold the content of the registers.  it doesn't need to be 
> able to represent the data directly (i.e. use doubles).  using uint128_t is the 
> right thing to do here.
> 

uint128_t is not in the reserved namespace of signal.h
if _POSIX_C_SOURCE is defined before its inclusion

__uint128_t is namespace clean, just non-standard compiler
extension, but probably i shouldn't worry about compiler
support on a new arch