ww: implement package initialization

cmd/wcc/ww.h

@@ -349,12 +349,20 @@ struct Node {
 	const char	*usealias;	/* N_USE: explicit file-local alias, or NULL. */
 	const char	*usepkgname;	/* N_USE: imported declared package name,
 					 * independent of the visible binding in `str`. */
+	int		useblank;	/* N_USE: `_` spelling; no source binding. */
 	const char	*pkgname;	/* declared package name for this source/export
 						 * section; independent of canonical `module`. */
 	int		sourceid;	/* lexical source-file scope within the parsed
 						 * owner unit; module-reset/module boundaries
 						 * advance it deterministically. */
 	int		used;		/* N_USE: checker observed this file-local binding. */
+	int		initfn;		/* special source `fn init`, absent from scope/API. */
+	int		initsynthetic;	/* compiler-owned variable helper/package task. */
+	int		runtimeinit;	/* module let lowered through an init helper. */
+	u64		initorder;	/* 1-based variable or init-function order. */
+	const char	*linksym;	/* raw compiler-private assembler symbol. */
+	Node		*refdecl;	/* checker-resolved value declaration. */
+	u64		initmark;	/* checker-private initializer walk mark. */
 	int		imported;	/* M1 #22: decl reached through an
 					 * `//ww:module <path>` import boundary
 					 * (vs root/primary). Gates the root-only
@@ -616,6 +624,7 @@ struct Checker {
 				 * any OTHER empty alloc has no element-type hint
 				 * and must fail to infer (harec check.c:1801).
 				 * Set by clet around its cexpr, NULL elsewhere. */
+	const char *package_init_symbol; /* canonical action-owned hidden task. */
 };
 
 void	check_init(Checker*, Arena*);