[PATCH] Preserve ::is{inf,nan}{f,l} prototypes even for C++11 and later

[Jonathan Wakely]

On 01/02/16 17:21 +0100, Jakub Jelinek wrote:
>The recent changes disable not just ::is{inf,nan} prototypes that are
>incompatible with C++11 and later and that are defined in <cmath> or
>libstdc++ <math.h> wrapper, but also the ::is{inf,nan}{f,l} prototypes,
>that are not incompatible with C++11.  This patch adds them back.

N.B. I also posted Jakub's patch at
https://sourceware.org/ml/libc-alpha/2016-02/msg00020.html with some
more context. The patch is the same though, so you can ignroe my
duplicate.


>---
> math/bits/mathcalls.h | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
>
>diff --git a/math/bits/mathcalls.h b/math/bits/mathcalls.h
>index a48345d..1b82fcd 100644
>--- a/math/bits/mathcalls.h
>+++ b/math/bits/mathcalls.h
>@@ -196,7 +196,9 @@ __MATHDECL_1 (int,__finite,, (_Mdouble_ __value)) __attribute__ ((__const__));
> _Mdouble_END_NAMESPACE
>
> #ifdef __USE_MISC
>-# if !defined __cplusplus || __cplusplus < 201103L /* Conflicts with C++11.  */
>+# if (!defined __cplusplus \
>+      || __cplusplus < 201103L /* isinf conflicts with C++11.  */ \
>+      || __MATH_DECLARING_DOUBLE == 0) /* isinff or isinfl don't.  */
> /* Return 0 if VALUE is finite or NaN, +1 if it
>    is +Infinity, -1 if it is -Infinity.  */
> __MATHDECL_1 (int,isinf,, (_Mdouble_ __value)) __attribute__ ((__const__));
>@@ -232,7 +234,9 @@ __END_NAMESPACE_C99
> __MATHDECL_1 (int,__isnan,, (_Mdouble_ __value)) __attribute__ ((__const__));
>
> #if defined __USE_MISC || (defined __USE_XOPEN && !defined __USE_XOPEN2K)
>-# if !defined __cplusplus || __cplusplus < 201103L /* Conflicts with C++11.  */
>+# if (!defined __cplusplus \
>+      || __cplusplus < 201103L /* isinf conflicts with C++11.  */ \
>+      || __MATH_DECLARING_DOUBLE == 0) /* isinff or isinfl don't.  */
> /* Return nonzero if VALUE is not a number.  */
> __MATHDECL_1 (int,isnan,, (_Mdouble_ __value)) __attribute__ ((__const__));
> # endif
>-- 
>2.4.3
>