add a few const qualifier

include/mruby/value.h

@@ -91,7 +91,7 @@ typedef short mrb_sym;
 #  define PRIo64 "I64o"
 #  define PRIx64 "I64x"
 #  define PRIX64 "I64X"
-static unsigned int IEEE754_INFINITY_BITS_SINGLE = 0x7F800000;
+static const unsigned int IEEE754_INFINITY_BITS_SINGLE = 0x7F800000;
 #  define INFINITY (*(float *)&IEEE754_INFINITY_BITS_SINGLE)
 #  define NAN ((float)(INFINITY - INFINITY))
 # else

mrbgems/mruby-random/src/mt19937ar.c

@@ -32,7 +32,7 @@ void mrb_random_init_genrand(mt_state *t, unsigned long s)
 unsigned long mrb_random_genrand_int32(mt_state *t)
 {
     unsigned long y;
-    static unsigned long mag01[2]={0x0UL, MATRIX_A};
+    static const unsigned long mag01[2]={0x0UL, MATRIX_A};
     /* mag01[x] = x * MATRIX_A  for x=0,1 */
 
     if (t->mti >= N) { /* generate N words at one time */
@@ -126,7 +126,7 @@ void init_by_array(unsigned long init_key[], int key_length)
 unsigned long genrand_int32(void)
 {
     unsigned long y;
-    static unsigned long mag01[2]={0x0UL, MATRIX_A};
+    static const unsigned long mag01[2]={0x0UL, MATRIX_A};
     /* mag01[x] = x * MATRIX_A  for x=0,1 */
 
     if (mti >= N) { /* generate N words at one time */

mrbgems/mruby-string-utf8/src/string.c

@@ -19,7 +19,7 @@ static const char utf8len_codepage[256] =
   3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,1,1,1,1,1,1,1,1,1,1,1,
 };
 
-static char utf8len_codepage_zero[256] =
+static const char utf8len_codepage_zero[256] =
 {
   1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
   1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,