diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3deb01ff3..6318dfdfb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -183,7 +183,7 @@ if(CMAKE_COMPILER_IS_GNUCC)
   endif()
   jerry_add_compile_warnings(logical-op)
 else()
-  jerry_add_compile_flags(-Wno-nested-anon-types)
+  jerry_add_compile_flags(-Wno-nested-anon-types -Wno-static-in-inline)
 endif()
 
 if(DEFINED EXTERNAL_COMPILE_FLAGS)
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-helpers-date.c b/jerry-core/ecma/builtin-objects/ecma-builtin-helpers-date.c
index f344dc402..44ab86865 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-helpers-date.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-helpers-date.c
@@ -106,17 +106,17 @@ ecma_date_days_in_year (ecma_number_t year) /**< year value */
     return year; /* year is NaN */
   }
 
-  if (fmod (floor (year), 4))
+  if (fmod (floor (year), 4) != ECMA_NUMBER_ZERO)
   {
     return (ecma_number_t) 365;
   }
 
-  if (fmod (floor (year), 100))
+  if (fmod (floor (year), 100) != ECMA_NUMBER_ZERO)
   {
     return (ecma_number_t) 366;
   }
 
-  if (fmod (floor (year), 400))
+  if (fmod (floor (year), 400) != ECMA_NUMBER_ZERO)
   {
     return (ecma_number_t) 365;
   }
diff --git a/jerry-core/ecma/operations/ecma-regexp-object.c b/jerry-core/ecma/operations/ecma-regexp-object.c
index 22d22b58f..738e8e16c 100644
--- a/jerry-core/ecma/operations/ecma-regexp-object.c
+++ b/jerry-core/ecma/operations/ecma-regexp-object.c
@@ -733,7 +733,7 @@ re_match_regexp (re_matcher_ctx_t *re_ctx_p, /**< RegExp matcher context */
 
         while (*bc_p == RE_OP_ALTERNATIVE)
         {
-          JERRY_TRACE_MSG (", jump: %d");
+          JERRY_TRACE_MSG (", jump: %d", offset);
           bc_p++;
           offset = re_get_value (&bc_p);
           bc_p += offset;
diff --git a/jerry-core/jerry-port.h b/jerry-core/jerry-port.h
index 19f956d6a..dba88076d 100644
--- a/jerry-core/jerry-port.h
+++ b/jerry-core/jerry-port.h
@@ -80,7 +80,7 @@ void jerry_port_fatal (jerry_fatal_code_t code);
  *
  * Example: a libc-based port may implement this with vprintf().
  */
-void jerry_port_console (const char *format, ...);
+void jerry_port_console (const char *format, ...) __attribute__ ((format (printf, 1, 2)));
 
 /**
  * Jerry log levels. The levels are in severity order
@@ -110,7 +110,7 @@ typedef enum
  * Example: a libc-based port may implement this with vfprintf(stderr) or
  * vfprintf(logfile), or both, depending on log level.
  */
-void jerry_port_log (jerry_log_level_t level, const char *format, ...);
+void jerry_port_log (jerry_log_level_t level, const char *format, ...) __attribute__ ((format (printf, 2, 3)));
 
 /*
  * Date Port API
diff --git a/jerry-core/lit/lit-strings.c b/jerry-core/lit/lit-strings.c
index 69172a4a8..ee26c62d8 100644
--- a/jerry-core/lit/lit-strings.c
+++ b/jerry-core/lit/lit-strings.c
@@ -348,7 +348,7 @@ lit_read_code_unit_from_utf8 (const lit_utf8_byte_t *buf_p, /**< buffer with cha
   lit_utf8_byte_t c = buf_p[0];
   if ((c & LIT_UTF8_1_BYTE_MASK) == LIT_UTF8_1_BYTE_MARKER)
   {
-    *code_point = (lit_code_point_t) (c & LIT_UTF8_LAST_7_BITS_MASK);
+    *code_point = (ecma_char_t) (c & LIT_UTF8_LAST_7_BITS_MASK);
     return 1;
   }
 
diff --git a/jerry-main/main-unix.c b/jerry-main/main-unix.c
index 8907fc252..84ebf1b1a 100644
--- a/jerry-main/main-unix.c
+++ b/jerry-main/main-unix.c
@@ -270,7 +270,7 @@ main (int argc,
         return JERRY_STANDALONE_EXIT_CODE_FAIL;
       }
 
-      jerry_port_default_set_log_level (argv[i][0] - '0');
+      jerry_port_default_set_log_level ((jerry_log_level_t) (argv[i][0] - '0'));
     }
     else if (!strcmp ("--abort-on-fail", argv[i]))
     {