fix build/dl loading; use core from anywhere

internal/engine.cm

@@ -1165,7 +1165,7 @@ var prog_path = prog + ".ce"
 var pkg_dir = null
 var core_dir = null
 if (!fd.is_file(prog_path)) {
-  pkg_dir = package.find_package_dir(prog_path)
+  pkg_dir = package.find_package_dir(".")
   if (pkg_dir)
     prog_path = pkg_dir + '/' + prog + '.ce'
 }

internal/os.c

@@ -358,6 +358,41 @@ static JSValue js_os_dylib_open(JSContext *js, JSValue self, int argc, JSValue *
   return dylib_obj;
 }
 
+static JSValue js_os_dylib_preload(JSContext *js, JSValue self, int argc, JSValue *argv)
+{
+  if (argc < 1)
+    return JS_NULL;
+
+  const char *path = JS_ToCString(js, argv[0]);
+  if (!path)
+    return JS_NULL;
+
+  void *handle;
+#ifdef _WIN32
+  handle = LoadLibraryA(path);
+#else
+  handle = dlopen(path, RTLD_LAZY | RTLD_GLOBAL);
+#endif
+
+  JS_FreeCString(js, path);
+
+  if (!handle)
+    return JS_NULL;
+
+  JSValue dylib_obj = JS_NewObjectClass(js, js_dylib_class_id);
+  if (JS_IsException(dylib_obj)) {
+#ifdef _WIN32
+    FreeLibrary((HMODULE)handle);
+#else
+    dlclose(handle);
+#endif
+    return JS_NULL;
+  }
+
+  JS_SetOpaque(dylib_obj, handle);
+  return dylib_obj;
+}
+
 static JSValue js_os_dylib_symbol(JSContext *js, JSValue self, int argc, JSValue *argv)
 {
   if (argc < 2) {
@@ -653,6 +688,7 @@ static const JSCFunctionListEntry js_os_funcs[] = {
   MIST_FUNC_DEF(os, exit, 0),
   MIST_FUNC_DEF(os, sleep, 1),
   MIST_FUNC_DEF(os, dylib_open, 1),
+  MIST_FUNC_DEF(os, dylib_preload, 1),
   MIST_FUNC_DEF(os, dylib_close, 1),
   MIST_FUNC_DEF(os, dylib_symbol, 2),
   MIST_FUNC_DEF(os, dylib_has_symbol, 2),

internal/shop.cm

@@ -717,9 +717,25 @@ function get_mach_path(pkg, stem) {
 }
 
 // Open a per-module dylib and return the dlopen handle
+// Pre-loads sibling dylibs with RTLD_LAZY|RTLD_GLOBAL so cross-dylib symbols resolve
 function open_module_dylib(dylib_path) {
   if (open_dls[dylib_path]) return open_dls[dylib_path]
   if (!fd.is_file(dylib_path)) return null
+  var dir = fd.dirname(dylib_path)
+  var entries = fd.readdir(dir)
+  var i = 0
+  var sibling = null
+  var handle = null
+  while (i < length(entries)) {
+    if (ends_with(entries[i], dylib_ext) && entries[i] != fd.basename(dylib_path)) {
+      sibling = dir + '/' + entries[i]
+      if (!open_dls[sibling]) {
+        handle = os.dylib_preload(sibling)
+        if (handle) open_dls[sibling] = handle
+      }
+    }
+    i = i + 1
+  }
   open_dls[dylib_path] = os.dylib_open(dylib_path)
   return open_dls[dylib_path]
 }