Rearrange SIZE_MAX. It is supported also VC++ since its version10. And there seems SIZE_MAX is defined in stdint.h. And it possibly (depends on the version of VC++) conflicts with SIZE_MAX in limits.h. This patch is no need if I did not support VC++.

src/array.c

@@ -4,17 +4,18 @@
 ** See Copyright Notice in mruby.h
 */
 
+#ifndef SIZE_MAX
+ /* Some versions of VC++
+  * has SIZE_MAX in stdint.h
+  */
+# include <limits.h>
+#endif
 #include "mruby.h"
 #include "mruby/array.h"
 #include "mruby/class.h"
 #include "mruby/string.h"
 #include "value_array.h"
 
-/* SIZE_MAX is not supported by VC++. */
-#ifndef SIZE_MAX
-# define SIZE_MAX ((size_t)-1)
-#endif
-
 #define ARY_DEFAULT_LEN   4
 #define ARY_SHRINK_RATIO  5 /* must be larger than 2 */
 #define ARY_C_MAX_SIZE (SIZE_MAX / sizeof(mrb_value))

src/gc.c

@@ -4,6 +4,12 @@
 ** See Copyright Notice in mruby.h
 */
 
+#ifndef SIZE_MAX
+ /* Some versions of VC++
+  * has SIZE_MAX in stdint.h
+  */
+# include <limits.h>
+#endif
 #include <string.h>
 #include "mruby.h"
 #include "mruby/array.h"
@@ -15,10 +21,6 @@
 #include "mruby/string.h"
 #include "mruby/variable.h"
 
-#ifndef SIZE_MAX
-#include <limits.h> // for SIZE_MAX
-#endif
-
 /*
   = Tri-color Incremental Garbage Collection
 

src/load.c

@@ -4,6 +4,12 @@
 ** See Copyright Notice in mruby.h
 */
 
+#ifndef SIZE_MAX
+ /* Some versions of VC++
+  * has SIZE_MAX in stdint.h
+  */
+# include <limits.h>
+#endif
 #include <stdlib.h>
 #include <string.h>
 #include "mruby/dump.h"

src/string.c

@@ -5,7 +5,12 @@
 */
 
 #include <ctype.h>
-#include <limits.h>
+#ifndef SIZE_MAX
+ /* Some versions of VC++
+  * has SIZE_MAX in stdint.h
+  */
+# include <limits.h>
+#endif
 #include <stddef.h>
 #include <stdlib.h>
 #include <string.h>