diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index cf50af4..123ddc5 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -3,7 +3,7 @@ add_library(src_lib STATIC
   hankaku.c
   utfsjis.c
   )
-target_compile_options(src_lib PRIVATE -Wno-pointer-sign)
+target_compile_options(src_lib PRIVATE -Wno-pointer-sign -Wall)
 target_include_directories(src_lib PRIVATE .)
 
 if (ANDROID)
@@ -12,7 +12,7 @@ else()
   add_executable(xsystem35)
 endif()
 
-target_compile_options(xsystem35 PRIVATE -Wno-pointer-sign)
+target_compile_options(xsystem35 PRIVATE -Wno-pointer-sign $<$<CONFIG:Debug>:-Wall>)
 target_include_directories(xsystem35 PRIVATE .)
 target_link_libraries(xsystem35 PRIVATE src_lib)
 
@@ -118,7 +118,7 @@ else()  # non-emscripten, non-android
     gameresource_test.c
     hankaku_test.c
     )
-  target_compile_options(src_tests PRIVATE -Wno-pointer-sign)
+  target_compile_options(src_tests PRIVATE -Wno-pointer-sign -Wall)
   target_link_libraries(src_tests PRIVATE src_lib)
   add_test(NAME src_tests COMMAND src_tests)
   configure_file(testdata/test.gr ${CMAKE_CURRENT_BINARY_DIR}/testdata/test.gr COPYONLY)
diff --git a/src/ags.c b/src/ags.c
index 71b033a..7e022b5 100644
--- a/src/ags.c
+++ b/src/ags.c
@@ -620,12 +620,11 @@ void ags_alpha_getPixel(int x, int y, int *pic) {
 }
 
 void ags_alpha_setPixel(int x, int y, int w, int h, BYTE *b) {
-	int savex, savey, savew, saveh, offset;
+	int savex, savey, savew, offset;
 	
 	savex = x;
 	savey = y;
 	savew = w;
-	saveh = h;
 	
 	if (!check_param(&x, &y, &w, &h)) return;	
 	
diff --git a/src/cdrom.Linux.c b/src/cdrom.Linux.c
index ed5dae9..3ceaed6 100644
--- a/src/cdrom.Linux.c
+++ b/src/cdrom.Linux.c
@@ -213,7 +213,7 @@ static int cdrom_start(int trk, int loop) {
 		return OK;
 	} else {
 		ti.cdti_trk0 = ti.cdti_trk1 = trk;
-		ti.cdti_ind0 = ti.cdti_ind0 = 0;
+		ti.cdti_ind0 = ti.cdti_ind1 = 0;
 		if (do_ioctl(CDROMPLAYTRKIND, &ti) < 0) {
 			perror("CDROMPLAYTRKIND");
 			return NG;
diff --git a/src/cmd2F.c b/src/cmd2F.c
index b93181b..e650536 100644
--- a/src/cmd2F.c
+++ b/src/cmd2F.c
@@ -500,6 +500,8 @@ void commands2F2A() {
 		sysVar[0] = save_save_str_with_file(fname_utf8, _var, cnt);
 		break;
 	default:
+		_var = getCaliValue();
+		cnt  = getCaliValue();
 		WARNING("Unknown QE command\n");
 		break;
 	}
diff --git a/src/cmd2F60.c b/src/cmd2F60.c
index dba697a..7b2a40b 100644
--- a/src/cmd2F60.c
+++ b/src/cmd2F60.c
@@ -36,7 +36,6 @@ typedef void *entrypoint (void);
 void commands2F60() {
 	int type = sys_getdw();  /* DLL type */
 	int fnum = sys_getdw();  /* function number */
-	entrypoint *function = NULL;
 
 #ifdef ENABLE_MODULES
 	if (dll == NULL) {
diff --git a/src/cmdb.c b/src/cmdb.c
index b2beecc..da08758 100644
--- a/src/cmdb.c
+++ b/src/cmdb.c
@@ -30,7 +30,7 @@
 #include "selection.h"
 
 /* 選択肢Window情報 */
-Bcom_WindowInfo selWinInfo[SELWINMAX] = {{ 464, 80, 160, 160, TRUE}, 0};
+Bcom_WindowInfo selWinInfo[SELWINMAX] = {{ 464, 80, 160, 160, TRUE }};
 /* 現在の選択肢Window番号 */
 static int selWinNo;
 /* 現在のMessageWindow番号 */
diff --git a/src/cmdl.c b/src/cmdl.c
index 11c0bf5..227a382 100644
--- a/src/cmdl.c
+++ b/src/cmdl.c
@@ -125,6 +125,8 @@ void commandLE() {
 		sysVar[0] = save_load_str_with_file(fname_utf8, _var, num);
 		break;
 	default:
+		_var = getCaliValue();
+		num  = getCaliValue();
 		WARNING("Unknown LE command %d\n", type);
 		break;
 	}
diff --git a/src/cmdm.c b/src/cmdm.c
index 4d3420a..d7612f7 100644
--- a/src/cmdm.c
+++ b/src/cmdm.c
@@ -364,8 +364,6 @@ void commandMN() {
 	int no   = sys_getc();
 	int num  = getCaliValue();
 	int *var = getCaliVariable();
-	int i, len;
-	const char *b;
 	
 	switch(no) {
 	case 0:
diff --git a/src/cmdq.c b/src/cmdq.c
index 587396a..4cca001 100644
--- a/src/cmdq.c
+++ b/src/cmdq.c
@@ -100,6 +100,8 @@ void commandQE() {
 		sysVar[0] = save_save_str_with_file(fname_utf8, _var, cnt);
 		break;
 	default:
+		_var = getCaliValue();
+		cnt  = getCaliValue();
 		WARNING("Unknown QE command %d\n", type);
 		break;
 	}
diff --git a/src/font.c b/src/font.c
index 613f5ac..7e8f1a9 100644
--- a/src/font.c
+++ b/src/font.c
@@ -152,7 +152,7 @@ static void sdl_drawAntiAlias_8bpp(int dstx, int dsty, SDL_Surface *src, unsigne
 int font_draw_glyph(int x, int y, const char *str_utf8, int cl) {
 	SDL_Surface *fs;
 	SDL_Rect r_src, r_dst;
-	int w, h, maxy;
+	int w, h;
 	
 	if (!*str_utf8)
 		return 0;
diff --git a/src/nact.c b/src/nact.c
index 0f94c4e..86653fc 100644
--- a/src/nact.c
+++ b/src/nact.c
@@ -163,7 +163,6 @@ static int checkMessage() {
 
 void nact_main() {
 	reset_counter_high(SYSTEMCOUNTER_MSEC, 1, 0);
-	int cnt = 0;
 
 	nact->frame_count = 0;
 	nact->cmd_count = 0;
diff --git a/src/s39ain.c b/src/s39ain.c
index 8387752..57b91bc 100644
--- a/src/s39ain.c
+++ b/src/s39ain.c
@@ -55,7 +55,7 @@ int s39ain_init(void) {
 	long len;
 	char *buf;
 	unsigned char *p;
-	int i, errors = 0;
+	int i;
 	
 	if (path_to_ain == NULL) {
 		return NG;
diff --git a/src/scenario.c b/src/scenario.c
index 5142019..9c0629b 100644
--- a/src/scenario.c
+++ b/src/scenario.c
@@ -41,7 +41,6 @@
 /* static mathods */
 static void popVars(int *tmp);
 static void popDatas(int *tmp);
-static void showStackInfo();
 static void sl_push(int type, int *val, int cnt);
 static int* sl_pop();
 
@@ -62,6 +61,7 @@ static int dataPushCnt = 0;
 /* driobject */
 static dridata *dfile;
 
+#if 0
 /* debug: show stack information */
 static void showStackInfo() {
 	DEBUG_MESSAGE("stack top = %p, cur = %p, size=%d\n", sco_stackbuf, sco_stackindex, sco_stacksize);
@@ -72,7 +72,6 @@ static void showIndexInfo() {
 	DEBUG_MESSAGE("page = %d, index = %x\n", sl_page, sl_index);
 }
 
-#ifdef DEBUG
 static void showStackData() {
 	int i, j;
 	int *var;
diff --git a/src/xsystem35.c b/src/xsystem35.c
index 4684828..5748f81 100644
--- a/src/xsystem35.c
+++ b/src/xsystem35.c
@@ -447,7 +447,6 @@ static void registerGameFiles(void) {
 }
 
 int main(int argc, char **argv) {
-	char *homedir = getenv("HOME"), *rc_name, *rc_path;
 #ifdef HAVE_SIGACTION
 	sys_set_signalhandler(SIGINT, SIG_IGN);
 #endif
@@ -507,11 +506,12 @@ int main(int argc, char **argv) {
 	sys35_init();	
 	
 #ifdef ENABLE_GTK
-	rc_name = get_profile("gtkrc_path");
+	char *homedir = getenv("HOME");
+	char *rc_name = get_profile("gtkrc_path");
 	if (!rc_name) {
 		rc_name = GTK_RC_NAME;
 	}
-	rc_path = (char *)malloc(sizeof(char) * (strlen(homedir) + strlen(rc_name)) + 2);
+	char *rc_path = (char *)malloc(sizeof(char) * (strlen(homedir) + strlen(rc_name)) + 2);
 	strcpy(rc_path, homedir);
 	strcat(rc_path, "/");
 	strcat(rc_path, rc_name);