0022651: Impossible to build OCC as static library due to using Standard_EXPORT instead of Standard_API

All library-specific macros for defining export / import properties of symbols on Windows (like Standard_API, __Draw_API, _math_API etc.) are eliminated.
Common macro Standard_EXPORT is used in all places where it is necessary.

New macro OCCT_STATIC_BUILD is defined for disabling Standard_EXPORT, to be used instead of HAVE_NO_DLL, though the latter is still supported as well (for compatibility).

To allow building OCCT in static mode on Windows after these changes:
- Files OSD_WNT_1.hxx and OSD_WNT_BREAK.hxx are removed; useful declarations are moved to OSD_WNT.hxx
- In the class IVtkVTK_ShapeData, static fields ARRNAME_MESH_TYPES and ARRNAME_SUBSHAPE_IDS are converted to static inline functions
- Global array ChoixRef defined in IntImp_ComputeTangence.cxx is converted to static function returning element of the array by index
- Unused class Quantity_Convert is removed (it had static field accessed by inline method)
- Struct Approx_Data defined in the same way in BRepApprox_Approx.hxx and GeomInt_WLApprox.hxx is made private member of these classes to avoid name clash
- Some C++ files producing no object code are removed
- In NCollection_EBTree.hxx and StdLPersistent_Collectio.hxx, definition of template virtual method is moved to class definition to avoid MSVC linker warnings on unused symbols

src/IntImp/IntImp_ComputeTangence.cxx

@@ -14,6 +14,7 @@
 
 #include <IntImp_ComputeTangence.hxx>
 #include <IntImp_ConstIsoparametric.hxx>
+#include <Standard_OutOfRange.hxx>
 
 static const IntImp_ConstIsoparametric staticChoixRef [4] = {
 IntImp_UIsoparametricOnCaro1,
@@ -22,7 +23,11 @@ IntImp_UIsoparametricOnCaro2,
 IntImp_VIsoparametricOnCaro2,
 };
 
-Standard_EXPORT const IntImp_ConstIsoparametric *ChoixRef = staticChoixRef ;
+IntImp_ConstIsoparametric ChoixRef (Standard_Integer theIndex)
+{
+  Standard_OutOfRange_Raise_if (theIndex < 0 || theIndex > 3, "ChoixRef() in " __FILE__)
+  return staticChoixRef[theIndex];
+}
 
 //=======================================================================
 //function : IntImp_ComputeTangence
@@ -131,7 +136,10 @@ Standard_Boolean IntImp_ComputeTangence(const gp_Vec DPuv[],
      Standard_Boolean triOk = Standard_False;
      Standard_Real t;
      IntImp_ConstIsoparametric ti;
-     for ( i=0;i<=3;i++)  TabIso[i] = ChoixRef[i];
+     for ( i=0;i<=3;i++)
+     {
+       TabIso[i] = staticChoixRef[i];
+     }
      do { 
        triOk = Standard_True;
        for(i=1;i<=3;i++) { 
@@ -168,7 +176,10 @@ Standard_Boolean IntImp_ComputeTangence(const gp_Vec DPuv[],
        NormDuv[II] = NormDuv[j];
        NormDuv[j] = Tampon;
      }
-     for (j=0; j<=3;j++) TabIso[j]=ChoixRef[Irang[j]];     
+     for (j=0; j<=3;j++)
+     {
+       TabIso[j] = staticChoixRef[Irang[j]];     
+     }
 #endif
    }
    return tangent;

src/IntImp/IntImp_ComputeTangence.hxx

@@ -15,20 +15,9 @@
 #include <gp_Vec.hxx>
 #include <IntImp_ConstIsoparametric.hxx>
 
-#if !defined(_WIN32) || defined(__ApproxInt_DLL) || defined(__IntImp_DLL) || defined(__IntWalk_DLL) || defined(__GeomInt_DLL) || defined(__IntPatch_DLL)
- Standard_EXPORTEXTERN const IntImp_ConstIsoparametric  *ChoixRef;
-#else
- Standard_IMPORT const IntImp_ConstIsoparametric  *ChoixRef;
-#endif
+Standard_EXPORT IntImp_ConstIsoparametric ChoixRef (Standard_Integer theIndex);
 
 Standard_EXPORT Standard_Boolean IntImp_ComputeTangence(const gp_Vec DPuv[],
 							const Standard_Real EpsUV[],
 							Standard_Real Tgduv[],
 							IntImp_ConstIsoparametric TabIso[]); 
-
-
-
-
-
-
-

src/IntImp/IntImp_Int2S.gxx

@@ -25,9 +25,6 @@
 #include <Standard_ConstructionError.hxx>
 #include <Precision.hxx>
 
-
-//Standard_IMPORT extern IntImp_ConstIsoparametric   *ChoixRef;
-
 IntImp_Int2S::IntImp_Int2S(const ThePSurface& surf1,
                            const ThePSurface& surf2,
                            const Standard_Real TolTangency ) :
@@ -131,7 +128,7 @@ IntImp_ConstIsoparametric IntImp_Int2S:: Perform(const TColStd_Array1OfReal& Par
   TColStd_Array1OfReal Duv (DuvBuf[0], 1, 4);
   Standard_Real UVd[4],UVf[4];
   IntImp_ConstIsoparametric ChoixIso[4];
-  IntImp_ConstIsoparametric BestChoix=ChoixRef[0];
+  IntImp_ConstIsoparametric BestChoix = ChoixRef(0);
   const ThePSurface& Caro1 = myZerParFunc.AuxillarSurface1();
   const ThePSurface& Caro2 = myZerParFunc.AuxillarSurface2();
 
@@ -220,7 +217,7 @@ IntImp_ConstIsoparametric IntImp_Int2S:: Perform(const TColStd_Array1OfReal& Par
     }
     else return BestChoix; // on a gagne
     empty = Standard_True;
-    BestChoix = ChoixRef[Iiso]; //en attendant
+    BestChoix = ChoixRef(Iiso); //en attendant
     BestChoix = Perform(Duv,Rsnld,BestChoix);
     if (!empty) { // verification si l on ne deborde pas sur le carreau 
       // reciproque
@@ -247,7 +244,7 @@ IntImp_ConstIsoparametric IntImp_Int2S:: Perform(const TColStd_Array1OfReal& Par
       if(Nc == 4)
         Nc = 0;
       
-      BestChoix = ChoixRef[Nc]; //en attendant
+      BestChoix = ChoixRef(Nc); //en attendant
       BestChoix = Perform(Duv,Rsnld,BestChoix);
     }
   }