Summary of my perl5 (revision 5 version 12 subversion 2) configuration:
   
  Platform:
    osname=linux, osvers=2.6.27.54-0.1-default, archname=x86_64-linux-thread-multi
    uname='linux flavius 2.6.27.54-0.1-default #1 smp 2010-10-19 18:40:07 +0200 x86_64 x86_64 x86_64 gnulinux '
    config_args='-Dusethreads -Dldflags=-ldb -Dcc=gcc  -Dnoextensions=ODBM_File -Dprefix=/usr/local/perl/5.12.2 -Dsiteprefix=/usr/local/perl/site_perl/5.12.2 -Dvendorprefix=/usr/local/perl/vendor_perl/5.12.2 -Uinstallusrbinperl -Uusemymalloc -des'
    hint=recommended, useposix=true, d_sigaction=define
    useithreads=define, usemultiplicity=define
    useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
    use64bitint=define, use64bitall=define, uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='gcc ', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
    optimize='-O2',
    cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include'
    ccversion='', gccversion='4.3.2 [gcc-4_3-branch revision 141291]', 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='gcc ', ldflags ='-ldb -fstack-protector -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib /lib64 /usr/lib64 /usr/local/lib64
    libs=-lnsl -lndbm -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread -lc -lgdbm_compat
    perllibs=-lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
    libc=/lib/libc-2.9.so, so=so, useshrplib=false, libperl=libperl.a
    gnulibc_version='2.9'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
    cccdlflags='-fPIC', lddlflags='-shared -O2 -L/usr/local/lib -fstack-protector'


Characteristics of this binary (from libperl): 
  Compile-time options: MULTIPLICITY PERL_DONT_CREATE_GVSV
                        PERL_IMPLICIT_CONTEXT PERL_MALLOC_WRAP USE_64_BIT_ALL
                        USE_64_BIT_INT USE_ITHREADS USE_LARGE_FILES
                        USE_PERLIO USE_PERL_ATOF USE_REENTRANT_API
  Built under linux
  Compiled at Nov 23 2010 18:49:46
  @INC:
    /usr/local/perl/site_perl/5.12.2/lib/site_perl/5.12.2/x86_64-linux-thread-multi
    /usr/local/perl/site_perl/5.12.2/lib/site_perl/5.12.2
    /usr/local/perl/vendor_perl/5.12.2/lib/vendor_perl/5.12.2/x86_64-linux-thread-multi
    /usr/local/perl/vendor_perl/5.12.2/lib/vendor_perl/5.12.2
    /usr/local/perl/5.12.2/lib/5.12.2/x86_64-linux-thread-multi
    /usr/local/perl/5.12.2/lib/5.12.2
    .