root# perl -V
Summary of my perl5 (revision 5 version 8 subversion 8) configuration:
  Platform:
    osname=linux, osvers=2.6.31-gentoo-r6, archname=x86_64-linux
    uname='linux uhuneu 2.6.31-gentoo-r6 #3 smp sat feb 13 17:11:00 cet 2010
x86_64 intel(r) xeon(r) cpu x3460 @ 2.80ghz genuineintel gnulinux '
    config_args='-des -Darchname=x86_64-linux -Dcccdlflags=-fPIC
-Dccdlflags=-rdynamic -Dcc=x86_64-pc-linux-gnu-gcc -Dprefix=/usr
-Dvendorprefix=/usr -Dsiteprefix=/usr -Dlocincpth=  -Doptimize=-march=core2
-O2 -pipe -Duselargefiles -Dd_semctl_semun -Dscriptdir=/usr/bin
-Dman1dir=/usr/share/man/man1 -Dman3dir=/usr/share/man/man3
-Dinstallman1dir=/usr/share/man/man1 -Dinstallman3dir=/usr/share/man/man3
-Dman1ext=1 -Dman3ext=3pm -Dinc_version_list=5.8.0 5.8.0/x86_64-linux 5.8.2
5.8.2/x86_64-linux 5.8.4 5.8.4/x86_64-linux 5.8.5 5.8.5/x86_64-linux 5.8.6
5.8.6/x86_64-linux 5.8.7 5.8.7/x86_64-linux  -Dcf_by=Gentoo -Ud_csh -Dusenm
-Di_ndbm -Di_gdbm -Di_db -Dusrinc=/usr/include -Dlibpth=/usr/local/lib64
/lib64 /usr/lib64'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=undef use5005threads=undef useithreads=undef
usemultiplicity=undef
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=define use64bitall=define uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='x86_64-pc-linux-gnu-gcc', ccflags ='-fno-strict-aliasing -pipe
-Wdeclaration-after-statement -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64
-I/usr/include/gdbm',
    optimize='-march=core2 -O2 -pipe',
    cppflags='-fno-strict-aliasing -pipe -Wdeclaration-after-statement
-I/usr/include/gdbm'
    ccversion='', gccversion='4.3.4', gccosandvers=''
    intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
    ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t',
lseeksize=8
    alignbytes=8, prototype=define
  Linker and Libraries:
    ld='x86_64-pc-linux-gnu-gcc -march=core2 -O2 -pipe', ldflags ='
-L/usr/local/lib64'
    libpth=/usr/local/lib64 /lib64 /usr/lib64
    libs=-lpthread -lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lc
    perllibs=-lpthread -lnsl -ldl -lm -lcrypt -lutil -lc
    libc=/lib/libc-2.10.1.so, so=so, useshrplib=false, libperl=libperl.a
    gnulibc_version='2.10.1'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic'
    cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib64'


Characteristics of this binary (from libperl): 
  Compile-time options: PERL_MALLOC_WRAP USE_64_BIT_ALL USE_64_BIT_INT
                        USE_LARGE_FILES USE_PERLIO
  Built under linux
  Compiled at Mar  1 2010 11:06:22
  %ENV:
    PERL5LIB="/global/common/perl"
  @INC:
    /global/common/perl
    /etc/perl
    /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux
    /usr/lib64/perl5/vendor_perl/5.8.8
    /usr/lib64/perl5/vendor_perl
    /usr/lib64/perl5/site_perl/5.8.8/x86_64-linux
    /usr/lib64/perl5/site_perl/5.8.8
    /usr/lib64/perl5/site_perl
    /usr/lib64/perl5/5.8.8/x86_64-linux
    /usr/lib64/perl5/5.8.8
    /usr/local/lib/site_perl
    .