[PATCH] Fix libstdc++-v3/include/math.h:66:1 2: error: 'constexpr bool std::isnan(double)' conflicts with a previous declaration

[Jonathan Wakely]

On 27/01/16 19:49 -0500, John David Anglin wrote:
>The attached patch fixes a stage1 build error compiling genautomata.c on hpux.  We need to test for obsolete
>XOPEN declarations of isinf and isnan on hpux.  Further, we need to check individually for isinf and isnan on hpux11
>since only isnan has an obsolete XOPEN declaration.
>
>Tested on hppa2.0w-hp-hpux11.11.

Also tests OK on x86_64-linux (with glibc 2.22).

>Okay for trunk?

Yes, OK, thanks.