[Bug math/19997] New: isfinite() and friends don't compile with non-float arguments

["mdavidsaver at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19997

            Bug ID: 19997
           Summary: isfinite() and friends don't compile with non-float
                    arguments
           Product: glibc
           Version: 2.23
            Status: NEW
          Severity: minor
          Priority: P2
         Component: math
          Assignee: unassigned at sourceware dot org
          Reporter: mdavidsaver at gmail dot com
  Target Milestone: ---

A perhaps unintentional side-effect of a change in math.h [1] is that the
floating-point classification macros (isfinite() et al.) now fail to compile
when given non-floating point arguments and when GCC builtins are used.

eg. "isfinite(0)" gives.

> error: non-floating-point argument in call to function â__builtin_isfiniteâ.

In my case[2] this is in test code, and is easily worked around.  A little
searching finds what appear to be a few other cases[3].

[1]
https://sourceware.org/git/?p=glibc.git;a=commit;h=8df4e219e43a4a257d0759b54fef8c488e2f282e

[2] http://www.aps.anl.gov/epics/tech-talk/2016/msg00730.php

[3]
https://www.google.com/#q=site:bugs.debian.org+%22non-floating-point+argument+in+call+to+function%22

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