Unable to dynamically load extension node types from DLL on Windows

[mortenpi]

For context: I am working on wrapping cmark-gfm in Julia to use it to extract the AST of a Markdown document. For that, I am dynamically opening the standard shared library products in Julia (i.e. with dlopen or LoadLibraryExW on Windows).

The node types for extensions (e.g. CMARK_NODE_STRIKETHROUGH) are stored as dynamic global variables (as opposed to compile time constants, as for the standard nodes). So when I try to interpret the cmark AST in Julia (e.g. whether a particular cmark_node is a strikethrough or not), I need to know those values (unless there is some other API for this that I missed).

However, those global variables are not decorated with CMARK_GFM_EXTENSIONS_EXPORT, and so on Windows, as far as I can tell, you can't actually read their value with GetProcAddress. I should say that on Linux and MacOS loading those variables with dlsym is fine, since I think everything is exported by default. I also tried patching cmark-gfm by adding CMARK_GFM_EXTENSIONS_EXPORTs to them and then GetProcAddress seems to work on them in Windows.

So, should all of these node type variables just be decorated with CMARK_GFM_EXTENSIONS_EXPORT? Or, if these variables are hidden from the library user for a reason, is there some API that I have missed or that should be created that could be used to determine if a cmark_node is of particular extension type?