use XBT_PULIC_CLASS here too

diff --git a/src/plugins/file_system/FileSystem.hpp b/src/plugins/file_system/FileSystem.hpp
index c54256e..6535c3d 100644 (file)
--- a/src/plugins/file_system/FileSystem.hpp
+++ b/src/plugins/file_system/FileSystem.hpp
@@ -87,7 +87,8 @@ private:
   sg_size_t size_     = 0;
 };
 
-class FileDescriptorHostExt {
+XBT_PUBLIC_CLASS FileDescriptorHostExt
+{
 public:
   static simgrid::xbt::Extension<Host, FileDescriptorHostExt> EXTENSION_ID;
   FileDescriptorHostExt() = default;