diff --git a/demos/demo_ui_app.c b/demos/demo_ui_app.c
index 1c804d6e2..e5951cd4f 100644
--- a/demos/demo_ui_app.c
+++ b/demos/demo_ui_app.c
@@ -71,12 +71,14 @@ uint32_t tk_mem_speed_test(void* buffer, uint32_t length, uint32_t* pmemcpy_spee
 static ret_t window_to_background(void* ctx, event_t* e) {
   widget_t* win = WIDGET(e->target);
   log_debug("%s to_background\n", win->name);
+	(void)win;
   return RET_OK;
 }
 
 static ret_t window_to_foreground(void* ctx, event_t* e) {
   widget_t* win = WIDGET(e->target);
   log_debug("%s to_foreground\n", win->name);
+	(void)win;
   return RET_OK;
 }
 
diff --git a/src/base/assets_manager.c b/src/base/assets_manager.c
index 3da125354..f689cd017 100644
--- a/src/base/assets_manager.c
+++ b/src/base/assets_manager.c
@@ -1,4 +1,4 @@
-/**
+/**
  * File:   assets_manager.h
  * Author: AWTK Develop Team
  * Brief:  asset manager
@@ -42,12 +42,6 @@ static int asset_cache_cmp_type(const void* a, const void* b) {
 
 static assets_manager_t* s_assets_manager = NULL;
 
-static system_info_t* assets_manager_get_system_info(assets_manager_t* am) {
-  return_value_if_fail(am != NULL, NULL);
-
-  return am->system_info != NULL ? am->system_info : system_info();
-}
-
 static locale_info_t* assets_manager_get_locale_info(assets_manager_t* am) {
   return_value_if_fail(am != NULL, NULL);
 
@@ -72,6 +66,12 @@ asset_info_t* assets_manager_load(assets_manager_t* am, asset_type_t type, const
 #elif defined(WITH_FS_RES)
 #include "tkc/fs.h"
 
+static system_info_t* assets_manager_get_system_info(assets_manager_t* am) {
+  return_value_if_fail(am != NULL, NULL);
+
+  return am->system_info != NULL ? am->system_info : system_info();
+}
+
 static const char* assets_manager_get_res_root(assets_manager_t* am) {
   if (am->res_root != NULL) {
     return am->res_root;
@@ -478,6 +478,7 @@ const asset_info_t* assets_manager_ref(assets_manager_t* am, asset_type_t type,
     const key_type_value_t* kv = asset_type_find_by_value(type);
     const char* asset_type = kv != NULL ? kv->name : "unknown";
     log_warn("!!!Asset [name=%s type=%s] not exist!!!\n", name, asset_type);
+		(void)asset_type;
   }
 
   return info;
diff --git a/src/ext_widgets/keyboard/candidates.c b/src/ext_widgets/keyboard/candidates.c
index 000bc2465..d43fa2696 100644
--- a/src/ext_widgets/keyboard/candidates.c
+++ b/src/ext_widgets/keyboard/candidates.c
@@ -1,4 +1,4 @@
-/**
+/**
  * File:   candidates.c
  * Author: AWTK Develop Team
  * Brief:  candidates
@@ -87,7 +87,6 @@ static ret_t candidates_relayout_children(widget_t* widget) {
   uint32_t i = 0;
   xy_t margin = 2;
   wh_t child_w = 0;
-  wh_t w = widget->w;
   xy_t child_x = margin;
   xy_t child_y = margin;
   widget_t* iter = NULL;
diff --git a/src/ext_widgets/scroll_view/scroll_view.c b/src/ext_widgets/scroll_view/scroll_view.c
index 7e35d4a8d..4af4592f7 100644
--- a/src/ext_widgets/scroll_view/scroll_view.c
+++ b/src/ext_widgets/scroll_view/scroll_view.c
@@ -1,4 +1,4 @@
-/**
+/**
  * File:   scroll_view.c
  * Author: AWTK Develop Team
  * Brief:  scroll_view
@@ -284,7 +284,6 @@ static ret_t scroll_view_notify_scrolled(scroll_view_t* scroll_view) {
 }
 
 static ret_t scroll_view_on_pointer_move(scroll_view_t* scroll_view, pointer_event_t* e) {
-  widget_t* widget = WIDGET(scroll_view);
   velocity_t* v = &(scroll_view->velocity);
   int32_t dx = e->x - scroll_view->down.x;
   int32_t dy = e->y - scroll_view->down.y;
diff --git a/src/ext_widgets/slide_view/slide_indicator.c b/src/ext_widgets/slide_view/slide_indicator.c
index 72ab6415d..e0c1e1faf 100644
--- a/src/ext_widgets/slide_view/slide_indicator.c
+++ b/src/ext_widgets/slide_view/slide_indicator.c
@@ -1,4 +1,4 @@
-/**
+/**
  * File:   slide_indicator.h
  * Author: AWTK Develop Team
  * Brief:  slide_indicator
@@ -22,6 +22,7 @@
 #include "tkc/mem.h"
 #include "tkc/utils.h"
 #include "base/timer.h"
+#include "base/layout.h"
 #include "base/enums.h"
 #include "tkc/easing.h"
 #include "tkc/func_call_parser.h"
@@ -285,9 +286,8 @@ static ret_t slide_indicator_paint_arc(widget_t* widget, canvas_t* c) {
   float_t cy = slide_indicator->anchor_y;
   uint32_t nr = slide_indicator->max;
   float_t margin = slide_indicator->margin;
-  float_t spacing = (slide_indicator->spacing / 180.0 * M_PI);
+  float_t spacing = (slide_indicator->spacing / 180.0f * M_PI);
   uint32_t size = slide_indicator->size;
-  uint32_t half_size = size >> 1;
   float_t radius = _DISTANCE(cx, cy, widget->w / 2, widget->h / 2) - margin - size / 2;
   float_t center = _RADIAN(cx, cy, widget->w / 2, widget->h / 2);
   float_t offset = 0;
diff --git a/src/xml/xml_parser.c b/src/xml/xml_parser.c
index 71f68985d..b27327786 100644
--- a/src/xml/xml_parser.c
+++ b/src/xml/xml_parser.c
@@ -45,7 +45,6 @@ struct _XmlParser {
 };
 
 static const char* strtrim(char* str);
-static void xml_parser_parse_entity(XmlParser* thiz);
 static void xml_parser_parse_start_tag(XmlParser* thiz);
 static void xml_parser_parse_end_tag(XmlParser* thiz);
 static void xml_parser_parse_comment(XmlParser* thiz);