C:\visperl\bin>perl -V Summary of my perl5 (revision 5 version 30 subversion 1) configuration: Platform: osname=MSWin32 osvers=10.0.17763.1039 archname=MSWin32-x64-multi-thread uname='' config_args='undef' hint=recommended useposix=true d_sigaction=undef useithreads=define usemultiplicity=define use64bitint=define use64bitall=undef uselongdouble=undef usemymalloc=n default_inc_excludes_dot=define bincompat5005=undef Compiler: cc='cl' ccflags ='-nologo -GF -W3 -O1 -MD -Zi -DNDEBUG -GL -fp:precise -DWIN32 -D_CONSOLE -DNO_STRICT -DWIN64 -DCONSERVATIVE -D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE -D_WINSOCK_DEPRECATED_NO_WARNINGS -DPERL_TEXTMODE_SCRIPTS -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS' optimize='-O1 -MD -Zi -DNDEBUG -GL -fp:precise' cppflags='-DWIN32' ccversion='19.16.27024.1' gccversion='' gccosandvers='' intsize=4 longsize=4 ptrsize=8 doublesize=8 byteorder=12345678 doublekind=3 d_longlong=undef longlongsize=8 d_longdbl=define longdblsize=8 longdblkind=0 ivtype='__int64' ivsize=8 nvtype='double' nvsize=8 Off_t='__int64' lseeksize=8 alignbytes=8 prototype=define Linker and Libraries: ld='link' ldflags ='-nologo -nodefaultlib -debug -opt:ref,icf -ltcg -libpath:"c:\visperl\lib\CORE" -machine:AMD64 -subsystem:console,"5.02"' libpth="C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\\lib\x64" libs=oldnames.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib netapi32.lib uuid.lib ws2_32.lib mpr.lib winmm.lib version.lib odbc32.lib odbccp32.lib comctl32.lib msvcrt.lib vcruntime.lib ucrt.lib perllibs=oldnames.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib netapi32.lib uuid.lib ws2_32.lib mpr.lib winmm.lib version.lib odbc32.lib odbccp32.lib comctl32.lib msvcrt.lib vcruntime.lib ucrt.lib libc=ucrt.lib so=dll useshrplib=true libperl=perl530.lib gnulibc_version='' Dynamic Linking: dlsrc=dl_win32.xs dlext=dll d_dlsymun=undef ccdlflags=' ' cccdlflags=' ' lddlflags='-dll -nologo -nodefaultlib -debug -opt:ref,icf -ltcg -libpath:"c:\visperl\lib\CORE" -machine:AMD64 -subsystem:console,"5.02"' Characteristics of this binary (from libperl): Compile-time options: HAS_TIMES HAVE_INTERP_INTERN MULTIPLICITY PERLIO_LAYERS PERL_COPY_ON_WRITE PERL_DONT_CREATE_GVSV PERL_IMPLICIT_CONTEXT PERL_IMPLICIT_SYS PERL_MALLOC_WRAP PERL_OP_PARENT PERL_PRESERVE_IVUV 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_THREAD_SAFE_LOCALE Built under MSWin32 Compiled at Feb 24 2020 12:20:14 @INC: C:/visperl/site/lib C:/visperl/lib