[Bug math/19439] Unix98 isinf and isnan functions conflict with C++11

["friesens at gdls dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19439

--- Comment #17 from Stanley Friesen <friesens at gdls dot com> ---
OK, the issue is with glibc then. The question is why did my instance of 
features.h revert to a version lacking this fix, and how to I get the 
fixed version back without manually applying the patch? It was fine until 
June 26. This change was the result of the equivalent of an 'apt-get 
update' followed by an 'apt-get upgrade'. But I have done that many times 
before with no problem. Our glibc is reported as being version 
3.13.0-86.131, clearly more recent than 2.23.*.

We are running Ubuntu 14.04.1. Could this be some sort of problem with the 
Ubuntu repository?



From:   "adhemerval.zanella at linaro dot org" 
<sourceware-bugzilla@sourceware.org>
To:     friesens@gdls.com, 
Date:   06/02/2016 08:01 PM
Subject:        [Bug math/19439] Unix98 isinf and isnan functions conflict 
with C++11



https://sourceware.org/bugzilla/show_bug.cgi?id=19439

--- Comment #16 from Adhemerval Zanella <adhemerval.zanella at linaro dot 
org> ---
You are confusing some concepts here: first GCC and GLIBC are different
projects.  Second, an GCC update usually does not necessary update none of
GLIBC installed files. Third, distro updates does not have necessary 
mirror the
master changes and fixes.

This bug has been fixed on release *2.23*, so it is up to your 
distribution (or
you if are building our your own system) to backport the changes to the 
glibc
package.

Now, if you are seeing this very issue on a GLIBC 2.23 or on master branch
(either if the package is using the release tarball or branch), now this 
bug
should be reopened with the information and/or a testcase to reproduce. 
Otherwise this is not a GLIBC issue.

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