### Description This in not important and may be closed at any time.

Some info about build warnings on Alpine dist

### Troubleshooting

#### Reproduction

start a build process on Alpine dist

#### Debugging Data

NA

#### Log Messages

``` CC (gcc) [M regex.so] regex_mod.o regex_mod.c: In function 'w_pcre_match_group': regex_mod.c:663:9: warning: 'num_pcre' may be used uninitialized in this function [-Wmaybe-uninitialized] return ki_pcre_match_group(_msg, &string, (int)num_pcre); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ LD (gcc) [M regex.so] regex.so CC (gcc) [M db_berkeley.so] bdb_fld.o ``` Next ``` CC (gcc) [M cplc.so] cpl_parser.o In file included from ../../core/mem/mem.h:41:0, from cpl_run.c:37: cpl_run.c: In function 'run_remove_location': ../../core/mem/../dprint.h:302:8: warning: 'url.len' may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(stderr, "%2d(%d) %s: %.*s%s" fmt, \ ^~~~~~~ cpl_run.c:416:6: note: 'url.len' was declared here str url; ^~~ CC (gcc) [M cplc.so] sub_list.o make[3]: 'libsrdb1.so.1.0' is up to date. ``` Next ``` CC (gcc) [M db2_ldap.so] ld_fld.o ld_fld.c: In function 'ldap_gentime2db_datetime': ld_fld.c:273:10: warning: implicit declaration of function 'timelocal' [-Wimplicit-function-declaration] *dst = timelocal(&time); ^~~~~~~~~ CC (gcc) [M db2_ldap.so] ld_cmd.o ``` Next ``` CC (gcc) [M auth_identity.so] auth_dynstr.o CC (gcc) [M auth_identity.so] auth_crypt.o auth_crypt.c:29:0: warning: "_GNU_SOURCE" redefined #define _GNU_SOURCE

<command-line>:0:0: note: this is the location of the previous definition ```

Next ``` CC (gcc) [M tls.so] tls_init.o tls_init.c:320:13: warning: 'ser_free' defined but not used [-Wunused-function] static void ser_free(void *ptr, const char *fname, int fline) ^~~~~~~~ CC (gcc) [M tls.so] tls_dump_vf.o CC (gcc) [M tls.so] tls_select.o CC (gcc) [M tls.so] tls_cfg.o CC (gcc) [M tls.so] tls_map.o CC (gcc) [M tls.so] tls_server.o CC (gcc) [M tls.so] tls_locking.o tls_locking.c:85:13: warning: 'dyn_destroy_f' defined but not used [-Wunused-function] static void dyn_destroy_f(struct CRYPTO_dynlock_value *l, ^~~~~~~~~~~~~ tls_locking.c:67:13: warning: 'dyn_lock_f' defined but not used [-Wunused-function] static void dyn_lock_f(int mode, struct CRYPTO_dynlock_value* l, ^~~~~~~~~~ tls_locking.c:45:37: warning: 'dyn_create_f' defined but not used [-Wunused-function] static struct CRYPTO_dynlock_value* dyn_create_f(const char* file, int line) ^~~~~~~~~~~~ CC (gcc) [M tls.so] tls_domain.o tls_domain.c:872:12: warning: 'tls_ssl_ctx_set_freelist' defined but not used [-Wunused-function] static int tls_ssl_ctx_set_freelist(SSL_CTX* ctx, long val, void* unused) ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from tls_domain.c:33:0: tls_domain.c: In function 'load_engine_private_key': tls_map.h:46:14: warning: 'pkey' may be used uninitialized in this function [-Wmaybe-uninitialized] ( (m)->tmp = (value),\ ^ tls_domain.c:1183:12: note: 'pkey' was declared here EVP_PKEY *pkey; ^~~~ CC (gcc) [M tls.so] tls_util.o ``` Next ``` CC (gcc) [M ims_usrloc_pcscf.so] dlist.o In file included from usrloc_db.c:10:0: usrloc_db.c: In function 'db_update_pcontact': usrloc_db.h:46:25: warning: 'service_routes.len' may be used uninitialized in this function [-Wmaybe-uninitialized] VAL_STR((_val)).len = (_str).len;\ ^ usrloc_db.c:122:13: note: 'service_routes.len' was declared here str impus, service_routes; ^~~~~~~~~~~~~~ In file included from usrloc_db.c:10:0: usrloc_db.h:45:24: warning: 'service_routes.s' may be used uninitialized in this function [-Wmaybe-uninitialized] VAL_STR((_val)).s = (_str).s;\ ^ usrloc_db.c:122:13: note: 'service_routes.s' was declared here str impus, service_routes; ^~~~~~~~~~~~~~ CC (gcc) [M ims_usrloc_pcscf.so] pcontact.o ``` Next ``` CC (gcc) [M evapi.so] evapi_mod.o evapi_dispatch.c: In function 'evapi_run_dispatcher': evapi_dispatch.c:699:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] ev_io_init(&io_server, evapi_accept_client, evapi_srv_sock, EV_READ); ^~~~~~~~~~ evapi_dispatch.c:699:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] evapi_dispatch.c:699:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] evapi_dispatch.c:699:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] evapi_dispatch.c:701:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] ev_io_init(&io_notify, evapi_recv_notify, _evapi_notify_sockets[0], EV_READ); ^~~~~~~~~~ evapi_dispatch.c:701:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] evapi_dispatch.c:701:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] evapi_dispatch.c:701:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] make[3]: 'libsrutils.so.1.0' is up to date. LD (gcc) [M evapi.so] evapi.so ```

#### SIP Traffic NA

### Possible Solutions

### Additional Information

Compiled master on Alpine 3.8 dist If this is fixed, then i can provide more warnings.