[PATCH] powerpc64le build fails with GCC7

[Joseph Myers]

On Mon, 21 Aug 2017, Alexey Neyman wrote:

> Hi all,
> 
> With GCC7, the test for -mfloat128 fails with a message that this option
> requires -mfloat128-type to be supplied as well. Cannot supply both options
> unconditionally, though, as GCC6 would choke on unknown option.

Could you explain further what the circumstances are under which this is 
or is not needed, given that people have evidently been building without 
this option, presumably with GCC configured differently?

You should not need to edit the toplevel configure.ac or config.make.in to 
set an architecture-specific makefile variable.  Rather, use 
LIBC_CONFIG_VAR in the sysdeps configure.ac to set such a variable without 
needing to change system-independent files.

-- 
Joseph S. Myers
joseph@codesourcery.com