Fix Windows cross-compilation

- Add -DBUILD_rl_json so stubs API functions get DLLEXPORT
- Use %zu/%s for size_t format strings (Tcl_ObjPrintf lacks %zu on 8.6)
- Use Tcl_WideInt for pointer-sized values in debug leak-info command

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: cyanogilvie

generic/parser.c

@@ -20,9 +20,9 @@ void throw_parse_error(Tcl_Interp* interp, struct parse_error* details) //{{{
 {
 	char		char_ofs_buf[20];		// 20 bytes allows for 19 bytes of decimal max 64 bit size_t, plus null terminator
 
-	snprintf(char_ofs_buf, 20, "%ld", details->char_ofs);
+	snprintf(char_ofs_buf, 20, "%zu", details->char_ofs);
 
-	Tcl_SetObjResult(interp, Tcl_ObjPrintf("Error parsing JSON value: %s at offset %ld", details->errmsg, details->char_ofs));
+	Tcl_SetObjResult(interp, Tcl_ObjPrintf("Error parsing JSON value: %s at offset %s", details->errmsg, char_ofs_buf));
 	Tcl_SetErrorCode(interp, "RL", "JSON", "PARSE", details->errmsg, details->doc, char_ofs_buf, NULL);
 }
 

generic/rl_json.c

@@ -3739,14 +3739,14 @@ static int jsonNRObj(ClientData cdata, Tcl_Interp* interp, int objc, Tcl_Obj *co
 		case M_LEAK_OBJ:	Tcl_NewObj(); break;
 		case M_LEAK_INFO:
 			{
-				unsigned long	addr;
+				Tcl_WideInt		addr;
 				Tcl_Obj*		obj = NULL;
 				const char*		s;
 				Tcl_Size		len;
 
 				CHECK_ARGS(2, "addr");
-				TEST_OK(Tcl_GetLongFromObj(interp, objv[2], (long*)&addr));
-				obj = (Tcl_Obj*)addr;
+				TEST_OK(Tcl_GetWideIntFromObj(interp, objv[2], &addr));
+				obj = (Tcl_Obj*)(intptr_t)addr;
 				s = Tcl_GetStringFromObj(obj, &len);
 				fprintf(stderr, "\tLeaked obj: %p[%" TCL_SIZE_MODIFIER "d] len %" TCL_SIZE_MODIFIER "d: \"%s\"\n", (void*)obj, obj->refCount, len, len < 256 ? s : "<too long>");
 

meson.build

@@ -13,6 +13,7 @@ endif
 
 add_project_arguments('-Wno-missing-field-initializers', language: 'c')
 add_project_arguments('-DHAVE_CONFIG_H', language: 'c')
+add_project_arguments('-DBUILD_rl_json', language: 'c')
 
 pkg_sources = []
 conf = configuration_data()        # For C code (config.h)