fix visibility of agg headers needed for svg2png built with -fvisibility=hidden - similiar to #1860

deps/agg/include/agg_curves.h

@@ -19,6 +19,8 @@
 
 #include "agg_array.h"
 
+#include <mapnik/config.hpp>
+
 namespace agg
 {
 
@@ -32,7 +34,7 @@ namespace agg
     };
     
     //--------------------------------------------------------------curve3_inc
-    class curve3_inc
+    class MAPNIK_DECL curve3_inc
     {
     public:
         curve3_inc() :
@@ -91,7 +93,7 @@ namespace agg
 
 
     //-------------------------------------------------------------curve3_div
-    class curve3_div
+    class MAPNIK_DECL curve3_div
     {
     public:
         curve3_div() : 
@@ -164,7 +166,7 @@ namespace agg
 
 
     //-------------------------------------------------------------curve4_points
-    struct curve4_points
+    struct MAPNIK_DECL curve4_points
     {
         double cp[8];
         curve4_points() {}
@@ -191,7 +193,7 @@ namespace agg
 
 
     //-------------------------------------------------------------curve4_inc
-    class curve4_inc
+    class MAPNIK_DECL curve4_inc
     {
     public:
         curve4_inc() :
@@ -371,7 +373,7 @@ namespace agg
 
 
     //-------------------------------------------------------------curve4_div
-    class curve4_div
+    class MAPNIK_DECL curve4_div
     {
     public:
         curve4_div() : 
@@ -471,7 +473,7 @@ namespace agg
 
 
     //-----------------------------------------------------------------curve3
-    class curve3
+    class MAPNIK_DECL curve3
     {
     public:
         curve3() : m_approximation_method(curve_div) {}
@@ -576,7 +578,7 @@ namespace agg
 
 
     //-----------------------------------------------------------------curve4
-    class curve4
+    class MAPNIK_DECL curve4
     {
     public:
         curve4() : m_approximation_method(curve_div) {}

deps/agg/include/agg_trans_affine.h

@@ -21,6 +21,7 @@
 
 #include <cmath>
 #include "agg_basics.h"
+#include <mapnik/config.hpp>
 
 namespace agg
 {
@@ -84,7 +85,7 @@ namespace agg
     // m *= agg::trans_affine_rotation(30.0 * 3.1415926 / 180.0);  // rotate
     // m *= agg::trans_affine_translation(100.0, 100.0);           // move back to (100,100)
     //----------------------------------------------------------------------
-    struct trans_affine
+    struct MAPNIK_DECL trans_affine
     {
         static const trans_affine identity;
         double sx, shy, shx, sy, tx, ty;

deps/agg/include/agg_vcgen_contour.h

@@ -17,6 +17,7 @@
 #define AGG_VCGEN_CONTOUR_INCLUDED
 
 #include "agg_math_stroke.h"
+#include <mapnik/config.hpp>
 
 namespace agg
 {
@@ -25,7 +26,7 @@ namespace agg
     //
     // See Implementation agg_vcgen_contour.cpp
     //
-    class vcgen_contour
+    class MAPNIK_DECL vcgen_contour
     {
         enum status_e
         {

deps/agg/include/agg_vcgen_stroke.h

@@ -17,7 +17,7 @@
 #define AGG_VCGEN_STROKE_INCLUDED
 
 #include "agg_math_stroke.h"
-
+#include <mapnik/config.hpp>
 
 namespace agg
 {
@@ -28,7 +28,7 @@ namespace agg
     // Stroke generator
     //
     //------------------------------------------------------------------------
-    class vcgen_stroke
+    class MAPNIK_DECL vcgen_stroke
     {
         enum status_e
         {