src: add default visibility to NODE_MODULE
It's currently not really possible to compile native add-ons with -fvisibility=hidden because that also hides the struct containing the module definition. The NODE_MODULE() and NODE_MODULE_DECL() macros are structured in a way that makes it impossible to add a visibility attribute manually so there is no escape hatch there. That's why this commit adds an explicit visibility attribute to the module definition. It doesn't help with node.js releases that are already out there but at least it improves the situation going forward.
|@@ -217,7 +217,7 @@ node_module_struct* get_builtin_module(const char *name);|
|# define NODE_MODULE_EXPORT __declspec(dllexport)|
|-# define NODE_MODULE_EXPORT /* empty */|
|+# define NODE_MODULE_EXPORT __attribute__((visibility("default")))|
|#define NODE_MODULE(modname, regfunc) \|