[Bug libstdc++/69413] [6 Regression] r232327 prevents libstdc++ working after upgrading glibc to 2.23

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69413

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Jan 22 12:47:26 2016
New Revision: 232726

URL: https://gcc.gnu.org/viewcvs?rev=232726&root=gcc&view=rev
Log:
Allow _GLIBCXX_HAVE_OBSOLETE_ISINF_ISNAN to be overridden

        PR libstdc++/69413
        * config/os/gnu-linux/os_defines.h: Define
        _GLIBCXX_NO_OBSOLETE_ISINF_ISNAN_DYNAMIC.
        * include/c_global/cmath (isinf, isnan): Check it.
        * doc/xml/manual/internals.xml: Document it.
        * doc/html/*: Regenerate.

Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/config/os/gnu-linux/os_defines.h
    trunk/libstdc++-v3/doc/html/manual/internals.html
    trunk/libstdc++-v3/doc/xml/manual/internals.xml
    trunk/libstdc++-v3/include/c_global/cmath