[src] Fix dll export/import missing macro and update header includes to not be relative

CMakeLists.txt

@@ -39,12 +39,16 @@ endif()
 target_link_libraries(${PROJECT_NAME} PUBLIC Sofa.Core)
 target_link_libraries(${PROJECT_NAME} PUBLIC CGAL::CGAL)
 
+target_include_directories(${PROJECT_NAME} PUBLIC "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>")
+target_include_directories(${PROJECT_NAME} PUBLIC "$<BUILD_INTERFACE:${CMAKE_BINARY_DIR}/include>")
+target_include_directories(${PROJECT_NAME} PUBLIC "$<INSTALL_INTERFACE:include>")
+
 # Install rules for the library and the headers; CMake package configurations files
 sofa_create_package_with_targets(
     PACKAGE_NAME ${PROJECT_NAME}
     PACKAGE_VERSION ${PROJECT_VERSION}
     TARGETS ${PROJECT_NAME} AUTO_SET_TARGET_PROPERTIES
     INCLUDE_SOURCE_DIR "src"
-    INCLUDE_INSTALL_DIR "MeshSkeletonizationPlugin"
+    INCLUDE_INSTALL_DIR "${PROJECT_NAME}"
     RELOCATABLE "plugins"
-    )
+)

src/MeshSkeletonizationPlugin/SkeletonGraph/SkeletonGraph.cpp

@@ -1,4 +1,5 @@
-#include "SkeletonGraph.h"
+#include <MeshSkeletonizationPlugin/SkeletonGraph/SkeletonGraph.h>
+
 
 #include <algorithm>
 #include <cmath>

src/MeshSkeletonizationPlugin/SkeletonGraph/SkeletonGraph.h

@@ -1,6 +1,7 @@
 #pragma once
 
-#include "SkeletonNode.h"
+#include <MeshSkeletonizationPlugin/config.h>
+#include <MeshSkeletonizationPlugin/SkeletonGraph/SkeletonNode.h>
 
 #include <array>
 #include <map>
@@ -15,7 +16,7 @@ namespace meshskeletonizationplugin
 /// MeshSkeletonization/SkeletonizationLoader's Export_polylines: blocks of
 /// "x y z" lines separated by a blank line) and stores it as a graph of
 /// SkeletonNode, then turns it into a rooted parent/children tree.
-class SkeletonGraph
+class SOFA_MESHSKELETONIZATIONPLUGIN_API SkeletonGraph
 {
 public:
     /// Parses the file, merging points that are within `mergeTolerance` of an

src/MeshSkeletonizationPlugin/SkeletonGraph/SkeletonNode.h

@@ -9,7 +9,7 @@ namespace meshskeletonizationplugin
 /// A single node of a skeletonized structure (e.g. a vessel centerline point).
 /// Deliberately has no SOFA/CGAL dependency so it can be reused, tested,
 /// and serialized independently of the plugin's simulation types.
-class SkeletonNode
+class SOFA_MESHSKELETONIZATIONPLUGIN_API SkeletonNode
 {
 public:
     SkeletonNode() = default;