[Bug math/18967] New: math.h XSI POSIX namespace (gamma, isnan, scalb)

["jsm28 at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=18967

            Bug ID: 18967
           Summary: math.h XSI POSIX namespace (gamma, isnan, scalb)
           Product: glibc
           Version: 2.22
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
          Assignee: unassigned at sourceware dot org
          Reporter: jsm28 at gcc dot gnu.org
  Target Milestone: ---

math.h incorrectly declares various functions for XSI POSIX 2001 and 2008
editions.  gamma was removed in the 2001 edition but is still declared, along
with gammaf and gammal which were never standard functions.  isnan is still
declared as a function, along with isnanf and isnanl which were never standard
functions, although in 2001 the function was replaced by the type-generic
macro.  scalbf and scalbl are declared although never standard, and scalb was
removed in the 2008 edition but is still declared.

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