From 5.1.0 Debian official build https://buildd.debian.org/status/fetch.php?pkg=kamailio&arch=arm64&v...

``` gcc -fPIC -DPIC -Wall -Wdate-time -D_FORTIFY_SOURCE=2 -g -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -DVERSION_NODATE -DNAME='"kamailio"' -DVERSION='"5.1.0"' -DARCH='"aarch64"' -DOS='linux_' -DOS_QUOTED='"linux"' -DCOMPILER='"gcc 7.2.0"' -D__CPU_aarch64 -D__OS_linux -DSER_VER=5001000 -DCFG_DIR='"/etc/kamailio/"' -DRUN_DIR='"/var/run/kamailio/"' -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 -DF_MALLOC -DQ_MALLOC -DTLSF_MALLOC -DDBG_SR_MEMORY -DUSE_TLS -DTLS_HOOKS -DUSE_CORE_STATS -DSTATISTICS -DMALLOC_STATS -DWITH_AS_SUPPORT -DUSE_SCTP -DNOSMP -DFAST_LOCK -DADAPTIVE_WAIT -DADAPTIVE_WAIT_LOOPS=1024 -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 -DHAVE_EPOLL -DHAVE_SIGIO_RT -DSIGINFO64_WORKARROUND -DUSE_FUTEX -DHAVE_SELECT -DKAMAILIO_MOD_INTERFACE -I./squirrel/include -DMOD_NAME='"app_sqlang"' -c app_sqlang_mod.c -o app_sqlang_mod.o -MMD -MP /usr/bin/make --no-print-directory -C ./squirrel/squirrel CC_EXTRA_FLAGS="-fPIC" \ OUT="../../libsquirrel.a" sq64 gcc -O2 -m64 -D_SQ64 -fno-exceptions -fno-rtti -Wall -fno-strict-aliasing -c sqapi.cpp sqbaselib.cpp sqfuncstate.cpp sqdebug.cpp sqlexer.cpp sqobject.cpp sqcompiler.cpp sqstate.cpp sqtable.cpp sqmem.cpp sqvm.cpp sqclass.cpp -I../include -I. -Iinclude -fPIC gcc: error: unrecognized command line option '-m64' Makefile:50: recipe for target 'sq64' failed make[4]: *** [sq64] Error 1 Makefile:23: recipe for target 'libsquirrel.a' failed make[3]: *** [libsquirrel.a] Error 2 ```