$ perl -V
Summary of my perl5 (revision 5 version 10 subversion 1) configuration:
   
  Platform:
    osname=cygwin, osvers=1.7.5(0.22553), archname=i686-cygwin-thread-multi-64int
    uname='cygwin_nt-5.1 reini 1.7.5(0.22553) 2010-04-12 19:07 i686 cygwin '
    config_args='-de -Dlibperl=cygperl5_10.dll -Dcc=gcc-4 -Dld=g++-4 -Dmksymlinks -Dusethreads -Dmad=y -Doptimize=-O3 -Accflags=-g3'
    hint=recommended, useposix=true, d_sigaction=define
    useithreads=define, usemultiplicity=define
    useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
    use64bitint=define, use64bitall=undef, uselongdouble=undef
    usemymalloc=y, bincompat5005=undef
  Compiler:
    cc='gcc-4', ccflags ='-DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -g3 -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include',
    optimize='-O3',
    cppflags='-DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -g3 -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include'
    ccversion='', gccversion='4.3.4 20090804 (release) 1', gccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=12345678
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
    ivtype='long long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
    alignbytes=8, prototype=define
  Linker and Libraries:
    ld='g++-4', ldflags =' -Wl,--enable-auto-import -Wl,--export-all-symbols -Wl,--stack,8388608 -Wl,--enable-auto-image-base -fstack-protector -L/usr/local/lib'
    libpth=/usr/local/lib /usr/lib /lib
    libs=-lgdbm -ldb -ldl -lcrypt -lgdbm_compat
    perllibs=-ldl -lcrypt
    libc=/usr/lib/libc.a, so=dll, useshrplib=true, libperl=cygperl5_10.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,--stack,8388608 -Wl,--enable-auto-image-base -L/usr/local/lib -fstack-protector'


Characteristics of this binary (from libperl): 
  Compile-time options: MULTIPLICITY MYMALLOC PERL_DONT_CREATE_GVSV
                        PERL_IMPLICIT_CONTEXT PERL_MAD PERL_USE_SAFE_PUTENV
                        USE_64_BIT_INT USE_ITHREADS USE_LARGE_FILES
                        USE_PERLIO USE_REENTRANT_API
  Locally applied patches:
        CYG11 no-bs
        CYG12 no archlib in otherlibdirs
        CYG14 Dynaloader
        CYG15 static-Win32CORE
        CYG17 utf8-paths
        CYG21 LibList-Kid.patch
        CYG22 cygwin-1.7 hints
        CYG23 544-stat
        CYG24 build man pages
        CYG25 rebase_privlib
        Module-Build-0.36_13
        Bug#55162 CYG18 File::Spec::case_tolerant performance
        disable ExtUtils::MakeMaker::Coverage in Sys-Syslog
  Built under cygwin
  Compiled at Aug 28 2010 20:17:29
  %ENV:
    PERL5LIB="/home/chm/perl/lib"
    PERLDOC_PAGER="less"
    CYGWIN=""
  @INC:
    /home/chm/perl/lib/i686-cygwin-thread-multi-64int
    /home/chm/perl/lib
    /usr/lib/perl5/5.10/i686-cygwin
    /usr/lib/perl5/5.10
    /usr/lib/perl5/site_perl/5.10/i686-cygwin
    /usr/lib/perl5/site_perl/5.10
    /usr/lib/perl5/vendor_perl/5.10/i686-cygwin
    /usr/lib/perl5/vendor_perl/5.10
    /usr/lib/perl5/vendor_perl/5.10
    /usr/lib/perl5/site_perl/5.8
    /usr/lib/perl5/vendor_perl/5.8
    .