linking to libk_so works

wasm@deco:~/trydynlib$ node prog.js
prog!
libk.kfunc1 -> 12

dso.h

@@ -2,8 +2,8 @@
 #define	_DSO_H
 
 // DSO_EXPORT marks a symbol as exported from currently-compiled DSO.
-// XXX + attr(used) ? (emscripten does this)
-#define DSO_EXPORT __attribute__((visibility("default")))
+// NOTE attr(used) is important for emscripten - otherwise the symbol is not exported via Module
+#define DSO_EXPORT __attribute__((used)) __attribute__((visibility("default")))
 
 // XXX stub (__declspec(dllimport) on mingw)
 #define	DSO_IMPORT

libk_so.js

@@ -197,16 +197,23 @@ function runPostSets() {
 // EMSCRIPTEN_END_FUNCS
 
 
-  return { establishStackSpace: establishStackSpace, runPostSets: runPostSets, setThrew: setThrew, stackAlloc: stackAlloc, stackRestore: stackRestore, stackSave: stackSave };
+  return { _kfunc1: _kfunc1, establishStackSpace: establishStackSpace, runPostSets: runPostSets, setThrew: setThrew, stackAlloc: stackAlloc, stackRestore: stackRestore, stackSave: stackSave };
 })
 // EMSCRIPTEN_END_ASM
 (Module.asmGlobalArg, Module.asmLibraryArg, buffer);
 
+var real__kfunc1 = asm["_kfunc1"]; asm["_kfunc1"] = function() {
+  assert(runtimeInitialized, 'you need to wait for the runtime to be ready (e.g. wait for main() to be called)');
+  assert(!runtimeExited, 'the runtime was exited (use NO_EXIT_RUNTIME to keep it alive after main() exits)');
+  return real__kfunc1.apply(null, arguments);
+};
+
 var real_setThrew = asm["setThrew"]; asm["setThrew"] = function() {
   assert(runtimeInitialized, 'you need to wait for the runtime to be ready (e.g. wait for main() to be called)');
   assert(!runtimeExited, 'the runtime was exited (use NO_EXIT_RUNTIME to keep it alive after main() exits)');
   return real_setThrew.apply(null, arguments);
 };
+var _kfunc1 = Module["_kfunc1"] = asm["_kfunc1"];
 var runPostSets = Module["runPostSets"] = asm["runPostSets"];
 var setThrew = Module["setThrew"] = asm["setThrew"];
 

prog.js

@@ -325,7 +325,6 @@ var asm2wasmImports = { // special asm2wasm imports
 var loadedDynamicLibraries = [];
 
 function loadDynamicLibrary(lib) {
-  console.log("loading", lib)
   var libModule;
   var src = Module['read'](lib);
   libModule = eval(src)(
@@ -334,7 +333,6 @@ function loadDynamicLibrary(lib) {
   );
   // add symbols into global namespace TODO: weak linking etc.
   for (var sym in libModule) {
-    console.log("symbol", sym)
     if (!Module.hasOwnProperty(sym)) {
       Module[sym] = libModule[sym];
     }