Sure:

$ perl -V
Summary of my perl5 (revision 5 version 10 subversion 1) configuration
+:
   
  Platform:
    osname=linux, osvers=2.6.24-24-generic, archname=x86_64-linux-thre
+ad-multi
    uname='linux tofana 2.6.24-24-generic #1 smp fri jul 24 22:15:50 u
+tc 2009 x86_64 gnulinux '
    config_args='-Dusethreads'
    hint=recommended, useposix=true, d_sigaction=define
    useithreads=define, usemultiplicity=define
    useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=und
+ef
    use64bitint=define, use64bitall=define, uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='cc', 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 -f
+stack-protector -I/usr/local/include'
    ccversion='', gccversion='4.2.4 (Ubuntu 4.2.4-1ubuntu3)', gccosand
+vers=''
    intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=1
+6
    ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t',
+ lseeksize=8
    alignbytes=8, prototype=define
  Linker and Libraries:
    ld='cc', ldflags =' -fstack-protector -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib /lib64 /usr/lib64
    libs=-lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
    perllibs=-lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
    libc=/lib/libc-2.7.so, so=so, useshrplib=false, libperl=libperl.a
    gnulibc_version='2.7'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
    cccdlflags='-fPIC', lddlflags='-shared -O2 -L/usr/local/lib -fstac
+k-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_REENTRANT_API
  Built under linux
  Compiled at Mar 26 2010 08:03:08
  @INC:
    /usr/local/lib/perl5/5.10.1/x86_64-linux-thread-multi
    /usr/local/lib/perl5/5.10.1
    /usr/local/lib/perl5/site_perl/5.10.1/x86_64-linux-thread-multi
    /usr/local/lib/perl5/site_perl/5.10.1
    .
[download]

(If you need more info, or want me to try out some modification or something, just ask...)

If you have a 32-bit version of perl available, the results of the same 0.71/0.72 comparison would be interesting.

---

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority".

In the absence of evidence, opinion is indistinguishable from prejudice.

32-bit versions¹ seem to be ok.  Both 0.71 and 0.72 print (consistently):

9175224
4194672
[download]

While I was at it, I also tried a few more 64-bit versions on other machines (5.10.0, 5.10.1, 5.12.2²). All exhibited the same wonkiness mentioned earlier. So it clearly seems to be a 64-bit incompatibility.

Two more notes:

(1)  In your Makefile.PL you have a line

  LIBS => $Config{cc} eq 'gcc' || $Config{cc} eq 'cc' ? ['-lstdc++'] :
+ '',
[download]

With some of the perls I had tried, $Config{cc} was set to an absolute path '/usr/local/bin/gcc', or to 'gcc ' (yes, with a trailing space - not sure where this came from, I didn't knowingly put it there). So, your check didn't match, and libstdc++ wasn't linked in, which in turn led to the usual undefined reference to '__gxx_personality_v0' when Dynaloader tried to load the .so file.

Something like the following might be slightly more robust:

  LIBS => $Config{cc} =~ /\bg?cc\s*$/ ? ['-lstdc++'] : '',
[download]

(2)  When trying to build Devel-Size-0.72 for 5.12.2 with a more recent and picky gcc (v4.3.2), I got the following errors:

Size.xs: In function 'UV thing_size(const SV*, char* (*)[8192])':
Size.xs:552: error: invalid conversion from 'const void*' to 'void*'
Size.xs:553: error: invalid conversion from 'const void*' to 'void*'
Size.xs:554: error: invalid conversion from 'const void*' to 'void*'
make: *** [Size.o] Error 1
[download]

Explicitly casting thing to non-const void* 'fixed' it:

    /* Is there something hanging off the arylen element? */
    if (AvARYLEN((void*)thing)) {
      if (check_new(tv, AvARYLEN((void*)thing))) {
    total_size += thing_size(AvARYLEN((void*)thing), tv);
[download]

__________

And here the 'perl -V's, just in case:

¹⁾

Read more... v5.10.1, 32-bit (ok) (4 kB)

²⁾

Read more... v5.12.2, 64-bit (not ok) (4 kB)