[Bug libstdc++/65473] New: Including <ciso646> does not define __GLIBCXX__

[ldionne.2 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65473

            Bug ID: 65473
           Summary: Including <ciso646> does not define __GLIBCXX__
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ldionne.2 at gmail dot com

Hi,

One would expect that including _any_ header from the standard library defines
the relevant detection macros. For example, I usually include the <ciso646>
header to check for libc++ (per http://goo.gl/eXNYJH). However, libstdc++'s
headers do not always define those detection macros.

Regards,
Louis Dionne