[cfe-dev] LibC++ v3.8 - Problems with ISO C wrapper headers

[Dennis Luehring via cfe-dev]

Am 25.01.2016 um 10:37 schrieb David Chisnall via cfe-dev:
> A little while ago, on FreeBSD we rewrote some of the [tg]math.h macros.  The old versions used sizeof(arg) == sizeof({float,double,long double}) to select the versions.  The new versions to use _Generic (with fallback __builtin_type_select and fallback to sizeof).  Unlike C++ overloading, _Generic does not permit implicit conversion.  We found (and reported / fixed) several issues that were real bugs in people’s code that had been silently returning the wrong value on other platforms (and older versions of FreeBSD) for years.

https://github.com/freebsd/freebsd/blob/master/lib/msun/src/math.h

line 80+