xmath.hpp, x*values.cpp: avoid exporting constants

[AlexGuteniev]

There are floating point DLL-exported constants that should be audited: removed if unused, otherwise changed to constant expressions

STL/stl/src/xmath.hpp

Lines 69 to 73 in 9231abe

	extern _CRTIMP2_PURE _Dconst _Denorm;
	extern _CRTIMP2_PURE _Dconst _Hugeval;
	extern _CRTIMP2_PURE _Dconst _Inf;
	extern _CRTIMP2_PURE _Dconst _Nan;
	extern _CRTIMP2_PURE _Dconst _Snan;

STL/stl/src/xmath.hpp

Lines 77 to 85 in 9231abe

	extern _CRTIMP2_PURE _Dconst _FDenorm;
	extern _CRTIMP2_PURE _Dconst _FInf;
	extern _CRTIMP2_PURE _Dconst _FNan;
	extern _CRTIMP2_PURE _Dconst _FSnan;
	extern _CRTIMP2_PURE _Dconst _LDenorm;
	extern _CRTIMP2_PURE _Dconst _LInf;
	extern _CRTIMP2_PURE _Dconst _LNan;
	extern _CRTIMP2_PURE _Dconst _LSnan;

STL/stl/src/xmath.hpp

Lines 113 to 115 in 9231abe

	extern const _Dconst _Eps;
	extern const _Dconst _Rteps;
	extern const double _Xbig;

STL/stl/src/xmath.hpp

Lines 142 to 144 in 9231abe

	extern const _Dconst _FEps;
	extern const _Dconst _FRteps;
	extern const float _FXbig;

STL/stl/src/xmath.hpp

Lines 170 to 172 in 9231abe

	extern const _Dconst _LEps;
	extern const _Dconst _LRteps;
	extern const long double _LXbig;

vNext note: Resolving this issue will require breaking binary compatibility. We won't be able to accept pull requests for this issue until the vNext branch is available. See #169 for more information.

[frederick-vs-ja]

Some internal functions are no longer used and not DLL-exported. Can we drop them right now?

[StephanTLavavej]

@frederick-vs-ja Yes, but you have to be very careful about searching for usage. Some of them are cleverly macroized for float/double/long double variants, so the identifiers appear to be unused at first.