$ perl -V Summary of my perl5 (revision 5 version 34 subversion 0) configuration: Platform: osname=freebsd osvers=12.0-release archname=amd64-freebsd uname='freebsd sisbsd.home 12.0-release freebsd 12.0-release r341666 generic amd64 ' config_args='-des -Duse64bitall -Dprefix=/home/sisyphus/perl-5.34.0-d-DEBUG -DDEBUGGING' hint=recommended useposix=true d_sigaction=define useithreads=undef usemultiplicity=undef use64bitint=define use64bitall=define uselongdouble=undef usemymalloc=n default_inc_excludes_dot=define Compiler: cc='cc' ccflags ='-DHAS_FPSETMASK -DHAS_FLOATINGPOINT_H -DDEBUGGING -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -D_FORTIFY_SOURCE=2' optimize='-O2 -g' cppflags='-DHAS_FPSETMASK -DHAS_FLOATINGPOINT_H -DDEBUGGING -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include' ccversion='' gccversion='4.2.1 Compatible FreeBSD Clang 6.0.1 (tags/RELEASE_601/final 335540)' gccosandvers='' intsize=4 longsize=8 ptrsize=8 doublesize=8 byteorder=12345678 doublekind=3 d_longlong=define longlongsize=8 d_longdbl=define longdblsize=16 longdblkind=3 ivtype='long' ivsize=8 nvtype='double' nvsize=8 Off_t='off_t' lseeksize=8 alignbytes=8 prototype=define Linker and Libraries: ld='cc' ldflags ='-Wl,-E -fstack-protector-strong -L/usr/local/lib' libpth=/usr/lib /usr/local/lib /usr/lib/clang/6.0.1/lib libs=-lpthread -lgdbm -ldl -lm -lcrypt -lutil -lc perllibs=-lpthread -ldl -lm -lcrypt -lutil -lc libc= so=so useshrplib=false libperl=libperl.a gnulibc_version='' Dynamic Linking: dlsrc=dl_dlopen.xs dlext=so d_dlsymun=undef ccdlflags=' ' cccdlflags='-DPIC -fPIC' lddlflags='-shared -L/usr/local/lib -fstack-protector-strong' Characteristics of this binary (from libperl): Compile-time options: DEBUGGING HAS_TIMES PERLIO_LAYERS PERL_COPY_ON_WRITE PERL_DONT_CREATE_GVSV PERL_MALLOC_WRAP PERL_OP_PARENT PERL_PRESERVE_IVUV USE_64_BIT_ALL USE_64_BIT_INT USE_LARGE_FILES USE_LOCALE USE_LOCALE_COLLATE USE_LOCALE_CTYPE USE_LOCALE_NUMERIC USE_LOCALE_TIME USE_PERLIO USE_PERL_ATOF Built under freebsd Compiled at Jul 26 2021 10:50:16 @INC: /home/sisyphus/perl-5.34.0-d-DEBUG/lib/site_perl/5.34.0/amd64-freebsd /home/sisyphus/perl-5.34.0-d-DEBUG/lib/site_perl/5.34.0 /home/sisyphus/perl-5.34.0-d-DEBUG/lib/5.34.0/amd64-freebsd /home/sisyphus/perl-5.34.0-d-DEBUG/lib/5.34.0