Boost.Numeric.Interval: Please specify rounding control mechanism

From: Bastien Commelongue (b.commelongue_at_[hidden])
Date: 2019-10-29 15:31:20

Hello,

I am building an app for IOS (ARM) and I had this issue while compiling:
*Boost.Numeric.Interval: Please specify rounding control mechanism.*

C99 version should be used in this case but  __USE_ISOC99 is not defined.

Modifying the condition with this code (using __cplusplus) fixed the issue:
*boost/numeric/interval/hw_rounding.hpp(36)*

*#if defined(BOOST_NUMERIC_INTERVAL_NO_HARDWARE) && (defined(__USE_ISOC99)
|| defined(__MSL__) || (defined __cplusplus && __cplusplus >= 201103L))#
 include <boost/numeric/interval/detail/c99_rounding_control.hpp>#endif*

Let me know if I missed something or if you plan to integrate this
modification in a next version.

Cheers,
Bastien Commelongue