diff --git a/Makefile b/Makefile
index 062587bdc..beb0fd8db 100644
--- a/Makefile
+++ b/Makefile
@@ -85,7 +85,7 @@ clean:
 	#cd bindings/ruby; $(MAKE) clean; rm -rf Makefile
 	$(MAKE) -C bindings/python clean
 	$(MAKE) -C bindings/csharp clean
-	$(MAKE) -C bindings/java clean
+	#$(MAKE) -C bindings/java clean
 	$(MAKE) -C bindings/ocaml clean
 	$(MAKE) -C tests clean
 
diff --git a/arch/AArch64/AArch64BaseInfo.c b/arch/AArch64/AArch64BaseInfo.c
index b63094d5e..bbed5a8ee 100644
--- a/arch/AArch64/AArch64BaseInfo.c
+++ b/arch/AArch64/AArch64BaseInfo.c
@@ -41,7 +41,7 @@ static bool compare_lower_str(char *s1, char *s2)
 {
 	char *lower = strdup(s2), *c;
 	for (c = lower; *c; c++)
-		*c = tolower(*c);
+		*c = tolower((int) *c);
 
 	bool res = (strcmp(s1, lower) == 0);
 	free(lower);
diff --git a/arch/X86/mapping.c b/arch/X86/mapping.c
index 0f42b3199..5120e06c6 100644
--- a/arch/X86/mapping.c
+++ b/arch/X86/mapping.c
@@ -26,7 +26,7 @@ static enum {
 	X86_REG_BP_DI = 503,
 	X86_REG_sib   = 504,
 	X86_REG_sib64 = 505
-} _dummy;
+} __attribute__((unused)) _dummy;
 
 static x86_reg sib_index_map[] = {
 	X86_REG_INVALID,