compiler warnings - Githubissues

With gcc --version gcc (SUSE Linux) 7.3.1 20180323 [gcc-7-branch revision 258812] Copyright (C) 2017 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. I get some warnings:
gcc  -Wall -c -o libipv6.o tools/libipv6.c
gcc  -Wall -o addr6 tools/addr6.c libipv6.o -lpcap -lm 
cp tools/blackhole6 ./
gcc  -Wall -o flow6 tools/flow6.c libipv6.o -lpcap -lm
gcc  -Wall -o frag6 tools/frag6.c libipv6.o -lpcap -lm 
gcc  -Wall -o icmp6 tools/icmp6.c libipv6.o -lpcap -lm
gcc  -Wall -o jumbo6 tools/jumbo6.c libipv6.o -lpcap -lm
gcc  -Wall -o na6 tools/na6.c libipv6.o -lpcap -lm
gcc  -Wall -o ni6 tools/ni6.c libipv6.o -lpcap -lm
tools/ni6.c: In function ‘send_packet’:
tools/ni6.c:1873:7: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
       if(idata->verbose_f)
       ^~
tools/ni6.c:1876:8: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
        return(-1);
        ^~~~~~
tools/ni6.c:1886:7: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
       if(idata->verbose_f)
       ^~
tools/ni6.c:1889:8: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
        return(-1);
        ^~~~~~
tools/ni6.c:1915:7: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
       if(idata->verbose_f)
       ^~
tools/ni6.c:1918:8: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
        return(-1);
        ^~~~~~
tools/ni6.c:1973:7: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
       if(idata->verbose_f)
       ^~
tools/ni6.c:1976:8: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
        return(-1);
        ^~~~~~
tools/ni6.c:1991:7: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
       if(idata->verbose_f)
       ^~
tools/ni6.c:1994:8: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
        return(-1);
        ^~~~~~
tools/ni6.c:2012:7: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
       if(idata->verbose_f)
       ^~
tools/ni6.c:2015:8: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
        return(-1);
        ^~~~~~
tools/ni6.c:2023:7: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
       if(idata->verbose_f)
       ^~
tools/ni6.c:2026:8: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
        return(-1);
        ^~~~~~
tools/ni6.c:2039:7: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
       if(idata->verbose_f)
       ^~
tools/ni6.c:2042:8: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
        return(-1);
        ^~~~~~
tools/ni6.c:2050:7: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
       if(idata->verbose_f)
       ^~
tools/ni6.c:2053:8: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
        return(-1);
        ^~~~~~
tools/ni6.c:2083:5: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
     if(idata->verbose_f)
     ^~
tools/ni6.c:2086:6: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
      return(-1);
      ^~~~~~
tools/ni6.c:2094:5: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
     if(idata->verbose_f)
     ^~
tools/ni6.c:2097:6: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
      return(-1);
      ^~~~~~
tools/ni6.c:2105:5: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
     if(idata->verbose_f)
     ^~
tools/ni6.c:2108:6: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
      return(-1);
      ^~~~~~
tools/ni6.c:2130:5: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
     if(idata->verbose_f)
     ^~
tools/ni6.c:2133:6: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
      return(-1);
      ^~~~~~
tools/ni6.c:2184:5: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
     if(idata->verbose_f)
     ^~
tools/ni6.c:2187:6: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
      return(-1);
      ^~~~~~
tools/ni6.c:2195:5: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
     if(idata->verbose_f)
     ^~
tools/ni6.c:2198:6: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
      return(-1);
      ^~~~~~
tools/ni6.c:2208:5: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
     if(idata->verbose_f)
     ^~
tools/ni6.c:2211:6: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
      return(-1);
      ^~~~~~
gcc  -Wall -o ns6 tools/ns6.c libipv6.o -lpcap -lm
gcc  -Wall -o path6 tools/path6.c libipv6.o -lpcap -lm
tools/path6.c: In function ‘main’:
tools/path6.c:743:7: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
       for(i=0; i<pprobe; i++)
       ^~~
tools/path6.c:746:8: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘for’
        printf("  %f ms", time_diff_ms(&(test[phop][pprobe].rtstamp), &(test[phop][pprobe].ststamp)));
        ^~~~~~
gcc  -Wall -o ra6 tools/ra6.c libipv6.o -lpcap -lm
tools/ra6.c: In function ‘main’:
tools/ra6.c:1370:7: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
       if(idata.verbose_f>1)
       ^~
tools/ra6.c:1373:8: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
        continue;
        ^~~~~~~~
tools/ra6.c: In function ‘print_attack_info’:
tools/ra6.c:2041:5: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
     if(idata->fragh_f)
     ^~
tools/ra6.c:2045:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
  if(preference > 3){
  ^~
gcc  -Wall -o rd6 tools/rd6.c libipv6.o -lpcap -lm
gcc  -Wall -o rs6 tools/rs6.c libipv6.o -lpcap -lm
gcc  -Wall -o scan6 tools/scan6.c libipv6.o -lpcap -lm
cp tools/script6 ./
gcc  -Wall -o tcp6 tools/tcp6.c libipv6.o -lpcap -lm
gcc  -Wall -o udp6 tools/udp6.c libipv6.o -lpcap -lm
echo "# SI6 Networks' IPv6 Toolkit Configuration File" > \
           data/ipv6toolkit.conf
echo WWW-client=curl >> \
           data/ipv6toolkit.conf 
echo OUI-Database=/usr/local/share/ipv6toolkit/oui.txt >> \
           data/ipv6toolkit.conf 
echo Ports-Database=/usr/local/share/ipv6toolkit/service-names-port-numbers.csv >> \
           data/ipv6toolkit.conf 
echo Top-Ports-Database=/usr/local/share/ipv6toolkit/top-port-numbers.csv >> \
           data/ipv6toolkit.conf 
echo Country-Database=/usr/local/share/ipv6toolkit/country-data.csv >> \
           data/ipv6toolkit.conf 
echo DNS-Suffix-Database=/usr/local/share/ipv6toolkit/public_suffix_list.dat >> \
           data/ipv6toolkit.conf
echo RIR-Database=/usr/local/share/ipv6toolkit/rir-database.csv >> \
           data/ipv6toolkit.conf 
echo DNS-Dictionary=/usr/local/share/ipv6toolkit/dns-dictionary.txt >> \
           data/ipv6toolkit.conf
fgont / ipv6toolkit

compiler warnings #51
