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/*
gcc 4.8.1 compiler test
*/

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char **argv)
{
    static unsigned char    buffer[16384];
    static unsigned char    output[16384];
    int	i, index;

    if (argc != 1) {
        fprintf(stderr, "usage: gcctest\n");
        exit(-1);
    }

    // Generate a pattern
    for (i = 0; i < 16384; i++)
    {
        buffer[i] = i & 0xff;
    }

    // Copy it
    for (i = 0; i < 16384; i++)
    {
        index = 0;
        for (i = 0; i < 16384; i++)
        {
#if 0
            output[index] = buffer[index] ^ 0;
            index++;
#else
            output[index++] = buffer[index] ^ 0;
#endif
        }
    }

    // Test copy
    for (i = 0; i < 16384; i++)
    {
        if (buffer[i] != output[i])
        {
            printf("Mismatch at %d, good = 0x%02x, bad = 0x%02x\n", i, buffer[i], output[i]);
            if (i > 10)
            {
                break;
            }
        }
    }

    return 0;
}

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re@w6rz:~/xfer$ gcc -Wall gcctest.c -o gcctest
gcctest.c: In function ‘main’:
gcctest.c:35:25: warning: operation on ‘index’ may be undefined [-Wsequence-point]
output[index++] = buffer[index] ^ 0;
^

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cd gr-dvbt/build
rm -rf *
cmake ../        /* add -DCMAKE_INSTALL_PREFIX= if you've installed GR in /opt */
make
sudo make install

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re@w6rz:~/xfer/gr-dvbt/lib$ git diff energy_dispersal_impl.cc
diff --git a/lib/energy_dispersal_impl.cc b/lib/energy_dispersal_impl.cc
index 1b4257f..990b48b 100644
--- a/lib/energy_dispersal_impl.cc
+++ b/lib/energy_dispersal_impl.cc
@@ -127,7 +127,10 @@ namespace gr {
               out[count++] = sync;
 
               for (int k = 1; k < d_psize; k++)
-                out[count++] = in[index + count] ^ clock_prbs(d_npacks);
+              {
+                out[count] = in[index + count] ^ clock_prbs(d_npacks);
+                count++;
+              }
 
               sync = d_SYNC;
               clock_prbs(d_npacks);
re@w6rz:~/xfer/gr-dvbt/lib$

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re@w6rz:~/xfer/gr-dvbt/lib$ git diff energy_descramble_impl.cc
diff --git a/lib/energy_descramble_impl.cc b/lib/energy_descramble_impl.cc
index e6a7f98..2ef8218 100644
--- a/lib/energy_descramble_impl.cc
+++ b/lib/energy_descramble_impl.cc
@@ -152,7 +152,10 @@ namespace gr {
               // PRBS clocking starts right after NSYNC
 
               for (int k = 1; k < d_bsize; k++)
-                out[count++] = in[d_index + count] ^ clock_prbs(d_nblocks);
+              {
+                out[count] = in[d_index + count] ^ clock_prbs(d_nblocks);
+                count++;
+              }
 
               // For subsequent blocks PRBS is clocked also on SYNC
               // but its output is not used
re@w6rz:~/xfer/gr-dvbt/lib$