do not export private symbols in wx shared libraries

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58351 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/dcbase.cpp

@@ -788,7 +788,7 @@ void wx_spline_push(double x1, double y1, double x2, double y2, double x3, doubl
 static bool wx_spline_add_point(double x, double y);
 static void wx_spline_draw_point_array(wxDC *dc);
 
-wxPointList wx_spline_point_list;
+static wxPointList wx_spline_point_list;
 
 #define                half(z1, z2)        ((z1+z2)/2.0)
 #define                THRESHOLD        5

src/common/imagpng.cpp

@@ -148,19 +148,19 @@ struct wxPNGInfoStruct
 extern "C"
 {
 
-void PNGLINKAGEMODE wx_PNG_stream_reader( png_structp png_ptr, png_bytep data,
+static void PNGLINKAGEMODE wx_PNG_stream_reader( png_structp png_ptr, png_bytep data,
                                                  png_size_t length )
 {
     WX_PNG_INFO(png_ptr)->stream.in->Read(data, length);
 }
 
-void PNGLINKAGEMODE wx_PNG_stream_writer( png_structp png_ptr, png_bytep data,
+static void PNGLINKAGEMODE wx_PNG_stream_writer( png_structp png_ptr, png_bytep data,
                                                  png_size_t length )
 {
     WX_PNG_INFO(png_ptr)->stream.out->Write(data, length);
 }
 
-void
+static void
 PNGLINKAGEMODE wx_png_warning(png_structp png_ptr, png_const_charp message)
 {
     wxPNGInfoStruct *info = png_ptr ? WX_PNG_INFO(png_ptr) : NULL;
@@ -170,7 +170,7 @@ PNGLINKAGEMODE wx_png_warning(png_structp png_ptr, png_const_charp message)
 
 // from pngerror.c
 // so that the libpng doesn't send anything on stderr
-void
+static void
 PNGLINKAGEMODE wx_png_error(png_structp png_ptr, png_const_charp message)
 {
     wx_png_warning(NULL, message);

src/common/list.cpp

@@ -701,9 +701,13 @@ bool wxStringList::Member(const wxChar *s) const
 }
 
 #ifdef __WXWINCE__
-extern "C" int __cdecl
+extern "C"
+{
+static int __cdecl
 #else
-extern "C" int LINKAGEMODE
+extern "C"
+{
+static int LINKAGEMODE
 #endif
 
 wx_comparestrings(const void *arg1, const void *arg2)
@@ -714,6 +718,8 @@ wx_comparestrings(const void *arg1, const void *arg2)
   return wxStrcmp (*s1, *s2);
 }
 
+}   // end of extern "C" (required because of GCC Bug c++/33078
+
 // Sort a list of strings - deallocates old nodes, allocates new
 void wxStringList::Sort()
 {

src/common/zipstrm.cpp

@@ -140,7 +140,7 @@ static wxFileOffset QuietSeek(wxInputStream& stream, wxFileOffset pos)
 /////////////////////////////////////////////////////////////////////////////
 // Class factory
 
-wxZipClassFactory g_wxZipClassFactory;
+static wxZipClassFactory g_wxZipClassFactory;
 
 wxZipClassFactory::wxZipClassFactory()
 {

src/generic/listctrl.cpp

@@ -4889,8 +4889,8 @@ int wxListMainWindow::GetItemWidthWithImage(wxListItem * item)
 // sorting
 // ----------------------------------------------------------------------------
 
-wxListCtrlCompare list_ctrl_compare_func_2;
-long              list_ctrl_compare_data;
+static wxListCtrlCompare list_ctrl_compare_func_2;
+static long              list_ctrl_compare_data;
 
 int LINKAGEMODE list_ctrl_compare_func_1( wxListLineData **arg1, wxListLineData **arg2 )
 {

src/html/m_layout.cpp

@@ -83,10 +83,13 @@ private:
 };
 
 // Comparison routine for bsearch into an int* array of pagebreaks.
-extern "C" int wxCMPFUNC_CONV wxInteger_compare(void const* i0, void const* i1)
+extern "C"
+{
+    static int wxCMPFUNC_CONV wxInteger_compare(void const* i0, void const* i1)
     {
         return *(int*)i0 - *(int*)i1;
     }
+}
 
 bool wxHtmlPageBreakCell::AdjustPagebreak(int* pagebreak, wxArrayInt& known_pagebreaks) const
 {