diff --git a/tcc.h b/tcc.h
index e5e38b22..2b2e577f 100644
--- a/tcc.h
+++ b/tcc.h
@@ -98,9 +98,11 @@ extern long double strtold (const char *__nptr, char **__endptr);
 #ifdef _MSC_VER
 # define NORETURN __declspec(noreturn)
 # define ALIGNED(x) __declspec(align(x))
+# define PRINTF_LIKE(x,y)
 #else
 # define NORETURN __attribute__((noreturn))
 # define ALIGNED(x) __attribute__((aligned(x)))
+# define PRINTF_LIKE(x,y) __attribute__ ((format (printf, (x), (y))))
 #endif
 
 /* gnu headers use to #define __attribute__ to empty for non-gcc compilers */
@@ -1206,9 +1208,9 @@ PUB_FUNC char *tcc_strdup_debug(const char *str, const char *file, int line);
 #define realloc(p, s) use_tcc_realloc(p, s)
 #undef strdup
 #define strdup(s) use_tcc_strdup(s)
-PUB_FUNC void _tcc_error_noabort(const char *fmt, ...);
-PUB_FUNC NORETURN void _tcc_error(const char *fmt, ...);
-PUB_FUNC void _tcc_warning(const char *fmt, ...);
+PUB_FUNC void _tcc_error_noabort(const char *fmt, ...) PRINTF_LIKE(1,2);
+PUB_FUNC NORETURN void _tcc_error(const char *fmt, ...) PRINTF_LIKE(1,2);
+PUB_FUNC void _tcc_warning(const char *fmt, ...) PRINTF_LIKE(1,2);
 
 /* other utilities */
 ST_FUNC void dynarray_add(void *ptab, int *nb_ptr, void *data);
@@ -1218,7 +1220,7 @@ ST_FUNC void cstr_cat(CString *cstr, const char *str, int len);
 ST_FUNC void cstr_wccat(CString *cstr, int ch);
 ST_FUNC void cstr_new(CString *cstr);
 ST_FUNC void cstr_free(CString *cstr);
-ST_FUNC int cstr_printf(CString *cs, const char *fmt, ...);
+ST_FUNC int cstr_printf(CString *cs, const char *fmt, ...) PRINTF_LIKE(2,3);
 ST_FUNC void cstr_reset(CString *cstr);
 
 ST_INLN void sym_free(Sym *sym);
diff --git a/tccasm.c b/tccasm.c
index fefe549f..c89cdc67 100644
--- a/tccasm.c
+++ b/tccasm.c
@@ -108,7 +108,7 @@ static void asm_expr_unary(TCCState *s1, ExprValue *pe)
                 if (sym && (!sym->c || elfsym(sym)->st_shndx == SHN_UNDEF))
                     sym = sym->prev_tok;
                 if (!sym)
-                    tcc_error("local label '%d' not found backward", n);
+                    tcc_error("local label '%d' not found backward", (int)n);
             } else {
                 /* forward */
                 if (!sym || (sym->c && elfsym(sym)->st_shndx != SHN_UNDEF)) {
diff --git a/tccelf.c b/tccelf.c
index de81e33c..d83cc30d 100644
--- a/tccelf.c
+++ b/tccelf.c
@@ -2808,7 +2808,7 @@ ST_FUNC int tcc_load_object_file(TCCState *s1,
                    ) {
                 invalid_reloc:
                     tcc_error_noabort("Invalid relocation entry [%2d] '%s' @ %.8x",
-                        i, strsec + sh->sh_name, rel->r_offset);
+                        i, strsec + sh->sh_name, (int)rel->r_offset);
                     goto fail;
                 }
                 rel->r_info = ELFW(R_INFO)(sym_index, type);
diff --git a/tccgen.c b/tccgen.c
index ca8b8b34..511cd8b5 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -368,7 +368,8 @@ ST_FUNC void test_lvalue(void)
 ST_FUNC void check_vstack(void)
 {
     if (vtop != vstack - 1)
-        tcc_error("internal compiler error: vstack leak (%d)", vtop - vstack + 1);
+        tcc_error("internal compiler error: vstack leak (%d)",
+                  (int)(vtop - vstack + 1));
 }
 
 /* ------------------------------------------------------------------------- */
@@ -8071,7 +8072,7 @@ static int decl0(int l, int is_for_loop_init, Sym *func_sym)
 	    skip(',');
 	    parse_mult_str(&error_str, "string constant");
 	    if (c == 0)
-		tcc_error("%s", error_str.data);
+		tcc_error("%s", (char *)error_str.data);
 	    cstr_free(&error_str);
 	    skip(')');
 	  static_assert_out:
diff --git a/tccpp.c b/tccpp.c
index 2bbdb2d4..bfbb1eea 100644
--- a/tccpp.c
+++ b/tccpp.c
@@ -3150,7 +3150,7 @@ static int paste_tokens(int t1, CValue *v1, int t2, CValue *v2)
         if (is_space(tok))
             continue;
         tcc_warning("pasting \"%.*s\" and \"%s\" does not give a valid"
-            " preprocessing token", n, cstr.data, (char*)cstr.data + n);
+            " preprocessing token", n, (char *)cstr.data, (char*)cstr.data + n);
         ret = 0;
         break;
     }