c:\>perl5.32.1.exe -V Summary of my perl5 (revision 5 version 32 subversion 1) configuration: Platform: osname=cygwin osvers=3.2.0(0.34053) archname=x86_64-cygwin-threads-multi uname='cygwin_nt-10.0 cygwinpro 3.2.0(0.34053) 2021-03-29 08:42 x86_64 cygwin ' config_args='-des -Dprefix=/usr -Dmksymlinks -Darchname=x86_64-cygwin-threads -Dlibperl=cygperl5_32.dll -Dcc=gcc -Dld=g++ -Accflags=-ggdb -O2 -pipe -Wall -Werror=format-security -D_FORTIFY_SOURCE=2 -fstack-protector-strong --param=ssp-buffer-size=4 -fdebug-prefix-map=/mnt/share/cygpkgs/perl/perl.x86_64/build=/usr/src/debug/perl-5.32.1-2 -fdebug-prefix-map=/mnt/share/cygpkgs/perl/perl.x86_64/src/perl-5.32.1=/usr/src/debug/perl-5.32.1-2 -fwrapv' hint=recommended useposix=true d_sigaction=define useithreads=define usemultiplicity=define use64bitint=define use64bitall=define uselongdouble=undef usemymalloc=n default_inc_excludes_dot=define bincompat5005=undef Compiler: cc='gcc' ccflags ='-DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -D_GNU_SOURCE -ggdb -O2 -pipe -Wall -Werror=format-security -D_FORTIFY_SOURCE=2 -fstack-protector-strong --param=ssp-buffer-size=4 -fdebug-prefix-map=/mnt/share/cygpkgs/perl/perl.x86_64/build=/usr/src/debug/perl-5.32.1-2 -fdebug-prefix-map=/mnt/share/cygpkgs/perl/perl.x86_64/src/perl-5.32.1=/usr/src/debug/perl-5.32.1-2 -fwrapv -fno-strict-aliasing' optimize='-O3' cppflags='-DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -D_GNU_SOURCE -ggdb -O2 -pipe -Wall -Werror=format-security -D_FORTIFY_SOURCE=2 -fstack-protector-strong --param=ssp-buffer-size=4 -fdebug-prefix-map=/mnt/share/cygpkgs/perl/perl.x86_64/build=/usr/src/debug/perl-5.32.1-2 -fdebug-prefix-map=/mnt/share/cygpkgs/perl/perl.x86_64/src/perl-5.32.1=/usr/src/debug/perl-5.32.1-2 -fwrapv -fno-strict-aliasing' ccversion='' gccversion='10.2.0' 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='g++' ldflags =' -Wl,--enable-auto-import -Wl,--export-all-symbols -Wl,--enable-auto-image-base -fstack-protector-strong' libpth=/usr/lib libs=-lpthread -lnsl -lgdbm -ldb -ldl -lcrypt -lgdbm_compat perllibs=-lpthread -lnsl -ldl -lcrypt libc=/usr/lib/libcygwin.a so=dll useshrplib=true libperl=cygperl5_32.dll gnulibc_version='' Dynamic Linking: dlsrc=dl_dlopen.xs dlext=dll d_dlsymun=undef ccdlflags=' ' cccdlflags=' ' lddlflags=' --shared -Wl,--enable-auto-import -Wl,--export-all-symbols -Wl,--enable-auto-image-base -fstack-protector-strong' Characteristics of this binary (from libperl): Compile-time options: HAS_TIMES MULTIPLICITY PERLIO_LAYERS PERL_COPY_ON_WRITE PERL_DONT_CREATE_GVSV PERL_IMPLICIT_CONTEXT PERL_OP_PARENT PERL_PRESERVE_IVUV PERL_USE_SAFE_PUTENV USE_64_BIT_ALL USE_64_BIT_INT USE_ITHREADS USE_LARGE_FILES USE_LOCALE USE_LOCALE_COLLATE USE_LOCALE_CTYPE USE_LOCALE_NUMERIC USE_LOCALE_TIME USE_PERLIO USE_PERL_ATOF USE_REENTRANT_API USE_THREAD_SAFE_LOCALE Locally applied patches: Cygwin: README Cygwin: use auto-image-base instead of fixed DLL base address Cygwin: modify hints Cygwin: Configure correct libsearch Cygwin: Configure correct libpth Cygwin: Encode fix for CVE-2021-36770 Cygwin: Win32 correct UTF8 handling Built under cygwin Compiled at Aug 14 2021 09:07:12 %ENV: CYGWIN="glob:ignorecase winsymlinks:native pipe_byte" @INC: /usr/local/lib/perl5/site_perl/5.32/x86_64-cygwin-threads /usr/local/share/perl5/site_perl/5.32 /usr/lib/perl5/vendor_perl/5.32/x86_64-cygwin-threads /usr/share/perl5/vendor_perl/5.32 /usr/lib/perl5/5.32/x86_64-cygwin-threads /usr/share/perl5/5.32