Forwarded from: **https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1069199**

``` Source: kamailio Version: 5.7.4-1 Severity: serious Tags: ftbfs Justification: fails to build from source (but built successfully in the past) X-Debbugs-Cc: sramacher@debian.org

https://buildd.debian.org/status/fetch.php?pkg=kamailio&arch=amd64&v...

g++ -std=c++11 -fPIC -DPIC -funroll-loops -Wcast-align -pthread -DKSR_PTHREAD_MUTEX_SHARED -Wall -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -DVERSION_NODATE -Wno-write-strings -Wno-deprecated -Wno-unused-function -Wno-sign-compare -Wno-strict-aliasing -fPIC -DPIC -funroll-loops -Wcast-align -pthread -DKSR_PTHREAD_MUTEX_SHARED -Wall -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -DVERSION_NODATE -DNAME='"kamailio"' -DVERSION='"5.7.4"' -DARCH='"x86_64"' -DOS='linux_' -DOS_QUOTED='"linux"' -DCOMPILER='"gcc 13.2.0"' -D__CPU_x86_64 -D__OS_linux -DVERSIONVAL=5007004 -DCFG_DIR='"/etc/kamailio/"' -DSHARE_DIR='"/usr/share/kamailio/"' -DRUN_DIR='"/var/run/kamailio/"' -DPKG_MALLOC -DSHM_MMAP -DDNS_IP_HACK -DUSE_MCAST -DUSE_TCP -DDISABLE_NAGLE -DHAVE_RESOLV_RES -DUSE_DNS_CACHE -DUSE_DNS_FAILOVER -DUSE_DST_BLOCKLIST -DUSE_NAPTR -DWITH_XAVP -DMEM_JOIN_FREE -DF_MALLOC -DQ_MALLOC -DTLSF_MALLOC -DDBG_SR_MEMORY -DUSE_TLS -DTLS_HOOKS -DUSE_CORE_STATS -DSTATISTICS -DMALLOC_STATS -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_WORKAROUND -DUSE_FUTEX -DHAVE_SELECT -I/usr/local/include -DMOD_NAME='"phonenum"' -c cphonenumber.cpp -o cphonenumber.o cc1plus: warning: ‘-Werror=’ argument ‘-Werror=implicit-function-declaration’ is not valid for C++ cc1plus: warning: ‘-Werror=’ argument ‘-Werror=implicit-function-declaration’ is not valid for C++ In file included from /usr/include/absl/base/config.h:86, from /usr/include/absl/base/const_init.h:25, from /usr/include/absl/synchronization/mutex.h:67, from /usr/include/phonenumbers/geocoding/phonenumber_offline_geocoder.h:24, from cphonenumber.cpp:24: /usr/include/absl/base/policy_checks.h:79:2: error: #error "C++ versions less than C++14 are not supported." 79 | #error "C++ versions less than C++14 are not supported." | ^~~~~

Cheers