Summary of my cperl (revision 5 version 24 subversion 4) configuration: Platform: osname=linux, osvers=4.17.0-1-amd64, archname=x86_64-linux uname='linux reini 4.17.0-1-amd64 #1 smp debian 4.17.8-1 (2018-07-20) x86_64 gnulinux ' config_args='-sder -Dcc=ccache gcc-8 -Accflags=-msse4.2 -march=native -DNO_MATHOMS -Dinstallman1dir=none -Dinstallman3dir=none -Dinstallsiteman1dir=none -Dinstallsiteman3dir=none -Darchname=x86_64-linux -Darchlib=/usr/local/lib/cperl/5.24.4/x86_64-linux -Dsitearch=/usr/local/lib/cperl/site_cperl/5.24.4/x86_64-linux -Dperlpath=/usr/local/bin/cperl5.24.4-nt -Dstartperl=#!/usr/local/bin/cperl5.24.4-nt -Dcf_email=rurban@cpan.org -Doptimize=-O3 -g' hint=recommended, useposix=true, d_sigaction=define useithreads=undef, usemultiplicity=undef use64bitint=define, use64bitall=define, uselongdouble=undef usemymalloc=n, bincompat5005=undef Compiler: cc='ccache gcc-8', ccflags ='-msse4.2 -march=native -DNO_MATHOMS -fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2', optimize='-O3 -g', cppflags='-msse4.2 -march=native -DNO_MATHOMS -fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include' ccversion='', gccversion='8.2.0', 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='ccache gcc-8', 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 -ldl -lm -lcrypt -lutil -lc perllibs=-lpthread -lnsl -ldl -lm -lcrypt -lutil -lc libc=libc-2.27.so, so=so, useshrplib=false, libperl=libperl.a gnulibc_version='2.27' Dynamic Linking: dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E' cccdlflags='-fPIC', lddlflags='-shared -O3 -g -L/usr/local/lib -L/opt/local/lib -fstack-protector-strong' Characteristics of this binary (from libperl): Compile-time options: HAS_TIMES NO_MATHOMS PERLIO_LAYERS PERL_COPY_ON_WRITE PERL_DONT_CREATE_GVSV PERL_HASH_FUNC_FNV1A PERL_MALLOC_WRAP PERL_PERTURB_KEYS_TOP PERL_PRESERVE_IVUV USE_64_BIT_ALL USE_64_BIT_INT USE_CPERL 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 Sep 13 2018 14:23:08 @INC: /usr/local/lib/cperl/site_cperl/5.24.4/x86_64-linux /usr/local/lib/cperl/site_cperl/5.24.4 /usr/local/lib/cperl/5.24.4/x86_64-linux /usr/local/lib/cperl/5.24.4 /usr/local/lib/cperl/site_cperl/5.24.3/x86_64-linux /usr/local/lib/cperl/site_cperl/5.24.3 /usr/local/lib/cperl/site_cperl/5.22.5 /usr/local/lib/cperl/site_cperl