Summary of my perl5 (revision 5 version 20 subversion 2) configuration:
   
  Platform:
    osname=darwin, osvers=10.8.0, archname=darwin-thread-multi-2level
    uname='darwin neko 10.8.0 darwin kernel version 10.8.0: tue jun 7 16:33:36 pdt 2011; root:xnu-1504.15.3~1release_i386 i386 '
    config_args='-ders -Dcc=gcc -Dusethreads -Duseithreads -Uinstallusrbinperl -Ulocincpth= -Uloclibpth= -Duse64bitint -Ud_poll -Ui_poll -Ui_libutil -Aldflags=-Wl,-search_paths_first -Alddlflags=-Wl,-search_paths_first -Accflags=-arch x86_64 -Aldflags=-arch x86_64 -Alddlflags=-arch x86_64 -Accflags=-DUSE_SITECUSTOMIZE -Duselargefiles -Accflags=-DPERL_RELOCATABLE_INCPUSH -Dprefix=/usr/local/ActivePerl-5.20 -Dprivlib=/usr/local/ActivePerl-5.20/lib -Darchlib=/usr/local/ActivePerl-5.20/lib -Dsiteprefix=/usr/local/ActivePerl-5.20/site -Dsitelib=/usr/local/ActivePerl-5.20/site/lib -Dsitearch=/usr/local/ActivePerl-5.20/site/lib -Dsed=/usr/bin/sed -Duseshrplib -Dcf_by=ActiveState -Dcf_email=support@ActiveState.com'
    hint=recommended, useposix=true, d_sigaction=define
    useithreads=define, usemultiplicity=define
    use64bitint=define, use64bitall=define, uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='/usr/bin/gcc', ccflags ='-fno-common -DPERL_DARWIN -no-cpp-precomp -arch x86_64 -DUSE_SITECUSTOMIZE -DPERL_RELOCATABLE_INCPUSH -fno-strict-aliasing -pipe -fstack-protector',
    optimize='-O3',
    cppflags='-no-cpp-precomp -fno-common -DPERL_DARWIN -no-cpp-precomp -arch x86_64 -DUSE_SITECUSTOMIZE -DPERL_RELOCATABLE_INCPUSH -fno-strict-aliasing -pipe -fstack-protector'
    ccversion='', gccversion='Apple LLVM version 7.0.2 (clang-700.1.81)', 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 -mmacosx-version-min=10.5', ldflags =' -Wl,-search_paths_first -arch x86_64 -fstack-protector'
    libpth=/usr/lib
    libs=-ldbm -ldl -lm -lutil -lc
    perllibs=-ldl -lm -lutil -lc
    libc=, so=dylib, useshrplib=true, libperl=libperl.dylib
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=bundle, d_dlsymun=undef, ccdlflags=' '
    cccdlflags=' ', lddlflags=' -bundle -undefined dynamic_lookup -Wl,-search_paths_first -arch x86_64 -fstack-protector'


Characteristics of this binary (from libperl): 
  Compile-time options: HAS_TIMES MULTIPLICITY PERLIO_LAYERS
                        PERL_DONT_CREATE_GVSV
                        PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
                        PERL_IMPLICIT_CONTEXT PERL_MALLOC_WRAP
                        PERL_NEW_COPY_ON_WRITE PERL_PRESERVE_IVUV
                        PERL_RELOCATABLE_INCPUSH USE_64_BIT_ALL
                        USE_64_BIT_INT USE_ITHREADS USE_LARGE_FILES
                        USE_LOCALE USE_LOCALE_COLLATE USE_LOCALE_CTYPE
                        USE_LOCALE_NUMERIC USE_PERLIO USE_PERL_ATOF
                        USE_REENTRANT_API USE_SITECUSTOMIZE
  Locally applied patches:
	ActivePerl Build 2002 [299195]
  Built under darwin
  Compiled at Jul 19 2015 04:34:30
  @INC:
    /Users/cmv/Library/ActivePerl-5.20/lib
    /usr/local/ActivePerl-5.20/site/lib
    /usr/local/ActivePerl-5.20/lib
    .