[Mesa-dev] [PATCH 02/10] mesa: remove M_PI, M_E, M_LOG2E macro definitions

[Erik Faye-Lund]

On Thu, Feb 26, 2015 at 4:24 AM, Matt Turner <mattst88 at gmail.com> wrote:
> On Wed, Feb 25, 2015 at 5:29 PM, Brian Paul <brianp at vmware.com> wrote:
>> Should be defined in math.h.  If not, we can add them to c99_math.h
>
> And FWIW, the MSDN page [0] says that if you define _USE_MATH_DEFINES
> before including math.h, these will be defined for you. Not sure what
> versions of MSVC that applies to.
>
> [0] https://msdn.microsoft.com/en-us/library/4hwaceh6.aspx

That link says "Visual Studio 2013", but roughly the same message is
also in the Visual Studio .NET 2003 docs (available through the "Other
Versions"-selector at the top).

IIRC, this has been the case since VC6, but we probably don't care
about that old toolchains.