Summary of my perl5 (revision 5 version 24 subversion 4) configuration: Platform: osname=linux, osvers=4.19.0-4-amd64, archname=x86_64-linux uname='linux reini 4.19.0-4-amd64 #1 smp debian 4.19.28-2 (2019-03-15) x86_64 gnulinux ' config_args='-de -Dusedevel -Uversiononly -Dinstallman1dir=none -Dinstallman3dir=none -Dinstallsiteman1dir=none -Dinstallsiteman3dir=none -Uuseithreads' hint=recommended, useposix=true, d_sigaction=define useithreads=undef, usemultiplicity=undef use64bitint=define, use64bitall=define, uselongdouble=undef usemymalloc=n, bincompat5005=undef Compiler: cc='cc', ccflags ='-fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64', optimize='-O2', cppflags='-fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include' ccversion='', gccversion='8.3.0', 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 =' -fstack-protector-strong -L/usr/local/lib -L/opt/local/lib' libpth=/usr/local/lib /usr/lib/gcc/x86_64-linux-gnu/8/include-fixed /usr/include/x86_64-linux-gnu /usr/lib /opt/local/lib /lib/x86_64-linux-gnu /lib/../lib /usr/lib/x86_64-linux-gnu /usr/lib/../lib /lib /lib64 /usr/lib64 /usr/local/lib64 libs=-lpthread -lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lc -lgdbm_compat perllibs=-lpthread -lnsl -ldl -lm -lcrypt -lutil -lc libc=libc-2.28.so, so=so, useshrplib=false, libperl=libperl.a gnulibc_version='2.28' Dynamic Linking: dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E' cccdlflags='-fPIC', lddlflags='-shared -O2 -L/usr/local/lib -L/opt/local/lib -fstack-protector-strong' Characteristics of this binary (from libperl): Compile-time options: HAS_TIMES PERLIO_LAYERS PERL_COPY_ON_WRITE PERL_DONT_CREATE_GVSV PERL_HASH_FUNC_ONE_AT_A_TIME_HARD PERL_MALLOC_WRAP PERL_PRESERVE_IVUV PERL_USE_DEVEL 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 linux Compiled at May 6 2019 10:36:01 @INC: /usr/local/lib/perl5/site_perl/5.24.4/x86_64-linux /usr/local/lib/perl5/site_perl/5.24.4 /usr/local/lib/perl5/5.24.4/x86_64-linux /usr/local/lib/perl5/5.24.4 /usr/local/lib/perl5/site_perl/5.24.3/x86_64-linux /usr/local/lib/perl5/site_perl/5.24.3 /usr/local/lib/perl5/site_perl/5.24.2/x86_64-linux /usr/local/lib/perl5/site_perl/5.24.2 /usr/local/lib/perl5/site_perl/5.24.1/x86_64-linux /usr/local/lib/perl5/site_perl/5.24.1 /usr/local/lib/perl5/site_perl/5.24.0/x86_64-linux /usr/local/lib/perl5/site_perl/5.24.0 /usr/local/lib/perl5/site_perl/5.23.8 /usr/local/lib/perl5/site_perl/5.23.0 /usr/local/lib/perl5/site_perl/5.22.4 /usr/local/lib/perl5/site_perl/5.22.3 /usr/local/lib/perl5/site_perl/5.22.2 /usr/local/lib/perl5/site_perl/5.22.1 /usr/local/lib/perl5/site_perl/5.22.0 /usr/local/lib/perl5/site_perl/5.21.11 /usr/local/lib/perl5/site_perl/5.21.10 /usr/local/lib/perl5/site_perl/5.21.9 /usr/local/lib/perl5/site_perl/5.21.8 /usr/local/lib/perl5/site_perl/5.21.7 /usr/local/lib/perl5/site_perl/5.21.4 /usr/local/lib/perl5/site_perl/5.20.3 /usr/local/lib/perl5/site_perl/5.20.2 /usr/local/lib/perl5/site_perl/5.20.1 /usr/local/lib/perl5/site_perl/5.18.4 /usr/local/lib/perl5/site_perl/5.16.3 /usr/local/lib/perl5/site_perl/5.14.4 /usr/local/lib/perl5/site_perl/5.14.3 /usr/local/lib/perl5/site_perl/5.12.5 /usr/local/lib/perl5/site_perl/5.10.1 /usr/local/lib/perl5/site_perl/5.10.0 /usr/local/lib/perl5/site_perl/5.8.9 /usr/local/lib/perl5/site_perl/5.8.8 /usr/local/lib/perl5/site_perl/5.8.5 /usr/local/lib/perl5/site_perl/5.8.4 /usr/local/lib/perl5/site_perl/5.6.2 /usr/local/lib/perl5/site_perl .