[sr-dev] [kamailio/kamailio] compiler warnings when compiling core/cfg/cfg_ctx.c (#1004)

juha-h notifications at github.com
Mon Feb 20 21:10:01 CET 2017 

On Debian Jessie, I get the warnings below when compiling core/cfg/cfg_ctx.c of Kamailio 5.0.  If I remove -Wall, the warnings do not show up, but that is not a solution.

-- Juha

----------------------------------------------------------------------
gcc -funroll-loops -Wcast-align -m64 -minline-all-stringops -falign-loops -ftree-vectorize -fno-strict-overflow -Wall -D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -DVERSION_NODATE   -DNAME='"sip-proxy"' -DVERSION='"5.0.0-b14"' -DARCH='"x86_64"' -DOS='linux_' -DOS_QUOTED='"linux"' -DCOMPILER='"gcc 4.9.2"' -D__CPU_x86_64 -D__OS_linux -DSER_VER=5000000 -DCFG_DIR='"/etc/sip-proxy/"' -DRUN_DIR='"/var/run/sip-proxy"' -DPKG_MALLOC -DSHM_MEM -DSHM_MMAP -DDNS_IP_HACK -DUSE_MCAST -DUSE_TCP -DDISABLE_NAGLE -DHAVE_RESOLV_RES -DUSE_DNS_CACHE -DUSE_DNS_FAILOVER -DUSE_DST_BLACKLIST -DUSE_NAPTR -DWITH_XAVP -DMEM_JOIN_FREE -DMEM_JOIN_FREE -DF_MALLOC -DQ_MALLOC -DTLSF_MALLOC -DUSE_TLS -DTLS_HOOKS -DUSE_CORE_STATS -DSTATISTICS -DMALLOC_STATS -DWITH_AS_SUPPORT -DUSE_SCTP -DFAST_LOCK -DADAPTIVE_WAIT -DADAPTIVE_WAIT_LOOPS=1024 -DCC_GCC_LIKE_ASM -DHAVE_GETHOSTBYNAME2 -DHAVE_UNION_SEMUN -DHAVE_SCHED_YIELD -DHAVE_MSG_NOSIGNAL -DHAVE_MSGHDR_MSG_CONTROL -DHAVE_ALLOCA_H -DHAVE_TIMEGM -DHAVE_SCHED_SETSCHEDULER -DHAVE_IP_MREQN -DUSE_RAW_SOCKS -DHAVE_EPOLL -DHAVE_SIGIO_RT -DSIGINFO64_WORKARROUND -DUSE_FUTEX -DHAVE_SELECT   -c core/cfg/cfg_ctx.c -o core/cfg/cfg_ctx.o -MMD -MP
core/cfg/cfg_ctx.c: In function cfg_set_now:
core/cfg/cfg_ctx.c:485:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     group_inst = (cfg_group_inst_t *)translate_pointer((char *)new_array,
     ^
core/cfg/cfg_ctx.c:489:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     CFG_GROUP_META(block, group)->array = new_array;
     ^
core/cfg/cfg_ctx.c:559:4: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
    if (block && (CFG_GROUP_META(block, group)->array != CFG_GROUP_META(*cfg_global, group)->array))
    ^
core/cfg/cfg_ctx.c:559:4: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
core/cfg/cfg_ctx.c:560:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     new_array = CFG_GROUP_META(block, group)->array;
     ^
core/cfg/cfg_ctx.c:579:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     replaced[i] = CFG_GROUP_META(*cfg_global, group)->array;
     ^
core/cfg/cfg_ctx.c: In function cfg_commit:
core/cfg/cfg_ctx.c:1120:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     if (!(CFG_GROUP_META(block, group)->array = 
     ^
core/cfg/cfg_ctx.c:1128:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     replaced[replaced_num] = CFG_GROUP_META(*cfg_global, group)->array;
     ^
core/cfg/cfg_ctx.c:1180:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     && (CFG_GROUP_META(block, changed->group)->array != CFG_GROUP_META(*cfg_global, changed->group)->array)
     ^
core/cfg/cfg_ctx.c:1180:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
core/cfg/cfg_ctx.c:1185:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     replaced[replaced_num] = CFG_GROUP_META(*cfg_global, group)->array;
     ^
core/cfg/cfg_ctx.c:1220:4: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
    if (CFG_GROUP_META(block, group)->array
    ^
core/cfg/cfg_ctx.c:1221:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     && (CFG_GROUP_META(block, group)->array != CFG_GROUP_META(*cfg_global, group)->array)
     ^
core/cfg/cfg_ctx.c:1221:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
core/cfg/cfg_ctx.c:1223:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     shm_free(CFG_GROUP_META(block, group)->array);
     ^
core/cfg/cfg_ctx.c: In function cfg_add_group_inst:
core/cfg/cfg_ctx.c:1577:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
  CFG_GROUP_META(block, group)->array = new_array;
  ^
core/cfg/cfg_ctx.c:1578:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
  CFG_GROUP_META(block, group)->num++;
  ^
core/cfg/cfg_ctx.c:1580:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
  if (CFG_GROUP_META(*cfg_global, group)->array) {
  ^
core/cfg/cfg_ctx.c:1589:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
   replaced[0] = CFG_GROUP_META(*cfg_global, group)->array;
   ^
core/cfg/cfg_ctx.c: In function cfg_del_group_inst:
core/cfg/cfg_ctx.c:1673:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
  CFG_GROUP_META(block, group)->array = new_array;
  ^
core/cfg/cfg_ctx.c:1674:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
  CFG_GROUP_META(block, group)->num--;
  ^
core/cfg/cfg_ctx.c:1676:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
  if (CFG_GROUP_META(*cfg_global, group)->array) {
  ^
core/cfg/cfg_ctx.c:1687:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     && (*(char **)(group_inst->vars + var->offset) != NULL)
     ^
core/cfg/cfg_ctx.c:1705:6: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
      && (*(char **)(group_inst->vars + var->offset) != NULL)
      ^
core/cfg/cfg_ctx.c:1707:6: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
      replaced[num] = *(char **)(group_inst->vars + var->offset);
      ^
core/cfg/cfg_ctx.c:1713:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
   replaced[num] = CFG_GROUP_META(*cfg_global, group)->array;
   ^

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