Summary of my perl5 (revision 5 version 20 subversion 1) configuration:
   
  Platform:
    osname=darwin, osvers=13.2.0, archname=darwin-2level
    uname='darwin mm-mac-2776.local 13.2.0 darwin kernel version 13.2.0: thu apr 17 23:03:13 pdt 2014; root:xnu-2422.100.13~1release_x86_64 x86_64 '
    config_args='-de -Dprefix=/Users/jkeenan/perl5/perlbrew/perls/perl-5.20.1 -Aeval:scriptdir=/Users/jkeenan/perl5/perlbrew/perls/perl-5.20.1/bin'
    hint=recommended, useposix=true, d_sigaction=define
    useithreads=undef, usemultiplicity=undef
    use64bitint=define, use64bitall=define, uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='cc', ccflags ='-fno-common -DPERL_DARWIN -fno-strict-aliasing -pipe -fstack-protector',
    optimize='-O3',
    cppflags='-fno-common -DPERL_DARWIN -fno-strict-aliasing -pipe -fstack-protector'
    ccversion='', gccversion='4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.54)', 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='env MACOSX_DEPLOYMENT_TARGET=10.3 cc', ldflags =' -fstack-protector'
    libpth=/Library/Developer/CommandLineTools/usr/bin/../lib/clang/6.0/lib /Library/Developer/CommandLineTools/usr/lib /usr/lib
    libs=-ldbm -ldl -lm -lutil -lc
    perllibs=-ldl -lm -lutil -lc
    libc=, so=dylib, useshrplib=false, libperl=libperl.a
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=bundle, d_dlsymun=undef, ccdlflags=' '
    cccdlflags=' ', lddlflags=' -bundle -undefined dynamic_lookup -fstack-protector'


Characteristics of this binary (from libperl): 
  Compile-time options: HAS_TIMES PERLIO_LAYERS PERL_DONT_CREATE_GVSV
                        PERL_HASH_FUNC_ONE_AT_A_TIME_HARD PERL_MALLOC_WRAP
                        PERL_NEW_COPY_ON_WRITE PERL_PRESERVE_IVUV
                        USE_64_BIT_ALL USE_64_BIT_INT USE_LARGE_FILES
                        USE_LOCALE USE_LOCALE_COLLATE USE_LOCALE_CTYPE
                        USE_LOCALE_NUMERIC USE_PERLIO USE_PERL_ATOF
  Built under darwin
  Compiled at Oct 28 2014 11:36:37
  %ENV:
    PERL5DIR="/Users/jkeenan/gitwork/perl"
    PERL5LIB="/Users/jkeenan/adama/extlib/lib/perl5/darwin-2level:/Users/jkeenan/adama/extlib/lib/perl5"
    PERLBREW_BASHRC_VERSION="0.71"
    PERLBREW_HOME="/Users/jkeenan/.perlbrew"
    PERLBREW_MANPATH="/Users/jkeenan/perl5/perlbrew/perls/perl-5.20.1/man"
    PERLBREW_PATH="/Users/jkeenan/perl5/perlbrew/bin:/Users/jkeenan/perl5/perlbrew/perls/perl-5.20.1/bin"
    PERLBREW_PERL="perl-5.20.1"
    PERLBREW_ROOT="/Users/jkeenan/perl5/perlbrew"
    PERLBREW_VERSION="0.71"
    PERL_LOCAL_LIB_ROOT="/Users/jkeenan/adama/extlib"
    PERL_MB_OPT="--install_base /Users/jkeenan/adama/extlib"
    PERL_MM_OPT="INSTALL_BASE=/Users/jkeenan/adama/extlib"
    PERL_WORKDIR="gitwork/perl"
  @INC:
    /Users/jkeenan/adama/extlib/lib/perl5/darwin-2level
    /Users/jkeenan/adama/extlib/lib/perl5/darwin-2level
    /Users/jkeenan/adama/extlib/lib/perl5
    /Users/jkeenan/perl5/perlbrew/perls/perl-5.20.1/lib/site_perl/5.20.1/darwin-2level
    /Users/jkeenan/perl5/perlbrew/perls/perl-5.20.1/lib/site_perl/5.20.1
    /Users/jkeenan/perl5/perlbrew/perls/perl-5.20.1/lib/5.20.1/darwin-2level
    /Users/jkeenan/perl5/perlbrew/perls/perl-5.20.1/lib/5.20.1
    .