CentOS6 fixes

Makefile.in

@@ -7,7 +7,7 @@ GIT_COMMITS=@GIT_COMMITS@
 
 CC?=gcc
 DEBUG?=-g3
-OPTIMIZATION?=-O3 -march=native
+OPTIMIZATION?=-O3 #-march=native
 WARN?=-Wall
 
 #Ultrasparc64 users experiencing SIGBUS should try the following gcc options

tools/Makefile.in

@@ -1,6 +1,6 @@
 CC?=gcc
 DEBUG?=-g3
-OPTIMIZATION?=-O2 -march=native
+OPTIMIZATION?=-O2 #-march=native
 WARN?=-Wall
 
 INSTALL=install

transform_speck.c

@@ -54,7 +54,9 @@ static int transop_deinit_speck(n2n_trans_op_t *arg) {
 static void set_speck_iv(transop_speck_t *priv, n2n_speck_ivec_t ivec) {
   // keep in mind the following condition: N2N_SPECK_IVEC_SIZE % sizeof(rand_value) == 0 !
   uint32_t rand_value;
-  for (uint8_t i = 0; i < N2N_SPECK_IVEC_SIZE; i += sizeof(rand_value)) {
+  uint8_t i;
+
+  for (i = 0; i < N2N_SPECK_IVEC_SIZE; i += sizeof(rand_value)) {
     rand_value = rand(); // CONCERN: rand() is not considered cryptographicly secure, REPLACE later
     memcpy(ivec + i, &rand_value, sizeof(rand_value));
   }