Summary of my perl5 (revision 5 version 24 subversion 2) configuration: Platform: osname=MSWin32, osvers=6.1, archname=MSWin32-x86-multi-thread-64int uname='' config_args='undef' hint=recommended, useposix=true, d_sigaction=undef useithreads=define, usemultiplicity=define use64bitint=define, use64bitall=undef, uselongdouble=undef usemymalloc=n, bincompat5005=undef Compiler: cc='undef', ccflags =' -s -O2 -DWIN32 -DPERL_TEXTMODE_SCRIPTS -DUSE_SITECUSTOMIZE -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -fwrapv -fno-strict-aliasing -mms-bitfields', optimize='-s -O2', cppflags='-DWIN32' ccversion='', gccversion='4.6.3', gccosandvers='' intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=12345678, doublekind=3 d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12, longdblkind=3 ivtype='long long', ivsize=8, nvtype='double', nvsize=8, Off_t='long long', lseeksize=8 alignbytes=8, prototype=define Linker and Libraries: ld='undef', ldflags ='-s -static-libgcc -static-libstdc++ -L"C:\Perl\lib\CORE" -L"C:\MinGW\i686-w64-mingw32\lib"' libpth=C:\MinGW\i686-w64-mingw32\lib libs=-lmoldname -lkernel32 -luser32 -lgdi32 -lwinspool -lcomdlg32 -ladvapi32 -lshell32 -lole32 -loleaut32 -lnetapi32 -luuid -lws2_32 -lmpr -lwinmm -lversion -lodbc32 -lodbccp32 -lcomctl32 perllibs=-lmoldname -lkernel32 -luser32 -lgdi32 -lwinspool -lcomdlg32 -ladvapi32 -lshell32 -lole32 -loleaut32 -lnetapi32 -luuid -lws2_32 -lmpr -lwinmm -lversion -lodbc32 -lodbccp32 -lcomctl32 libc=, so=dll, useshrplib=true, libperl=libperl524.a gnulibc_version='' Dynamic Linking: dlsrc=dl_win32.xs, dlext=dll, d_dlsymun=undef, ccdlflags=' ' cccdlflags=' ', lddlflags='-mdll -s -static-libgcc -static-libstdc++ -L"C:\Perl\lib\CORE" -L"C:\MinGW\i686-w64-mingw32\lib"' 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_HASH_FUNC_ONE_AT_A_TIME_HARD PERL_IMPLICIT_CONTEXT PERL_IMPLICIT_SYS PERL_MALLOC_WRAP 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_SITECUSTOMIZE Locally applied patches: ActivePerl Build 2403 [403863] Built under MSWin32 Compiled at Aug 25 2017 05:28:36 %ENV: PERLLIB="C:/Perl64/site/lib/Devel;C:/Perl64/Digest;C:/Perl64/site/lib/LWP/Protocol;C:/Perl64/site/lib/Crypt;C:/Perl64/site/lib/SSLeay;C:/Perl64/site/lib/ExtUtils;C:/Perl64/site/lib/LWP;C;/Perl64/lib/ExtUtils;C:/Perl64/lib/Crypt;C:/Perl64/lib/Crypt/SSLeay;c:/Perl64/lib/HTTP/UserAgent/Cookies;c:/Perl64/lib/ExtUtils/WWW/Mechanize" @INC: C:/Perl64/site/lib/Devel C:/Perl64/Digest C:/Perl64/site/lib/LWP/Protocol C:/Perl64/site/lib/Crypt C:/Perl64/site/lib/SSLeay C:/Perl64/site/lib/ExtUtils C:/Perl64/site/lib/LWP C /Perl64/lib/ExtUtils C:/Perl64/lib/Crypt C:/Perl64/lib/Crypt/SSLeay c:/Perl64/lib/HTTP/UserAgent/Cookies c:/Perl64/lib/ExtUtils/WWW/Mechanize C:/Perl/site/lib C:/Perl/lib .