F21 - perl broken? 5.16 vs. 5.18 API problem.

[Martin Møller Skarbiniks Pedersen]

Hi,
  I am trying to build a rpm but now I got a perl  problem ?
  It looks like my perl installation is somehow broken currently.
  Pleas advise.

Thanks a lot.

Regards
Martin

$ perl --version

This is perl 5, version 18, subversion 4 (v5.18.4) built for
x86_64-linux-thread-multi
(with 23 registered patches, see perl -V for more detail)
[...]

$ perl -MCPAN -e shell
Attempt to reload Scalar/Util.pm aborted.
Compilation failed in require at /usr/local/share/perl5/Safe.pm line 4.
BEGIN failed--compilation aborted at /usr/local/share/perl5/Safe.pm line 4.
Compilation failed in require at /usr/share/perl5/CPAN.pm line 56.
BEGIN failed--compilation aborted at /usr/share/perl5/CPAN.pm line 56.
Compilation failed in require.
BEGIN failed--compilation aborted.


$ rpmbuild -ba moon-buggy.spec
[...]
+ autoreconf -if
Perl API version v5.16.0 of threads does not match v5.18.0 at
/usr/share/perl5/XSLoader.pm line 92.
Compilation failed in require at
/usr/share/automake-1.14/Automake/ChannelDefs.pm line 23.
BEGIN failed--compilation aborted at
/usr/share/automake-1.14/Automake/ChannelDefs.pm line 26.
Compilation failed in require at
/usr/share/automake-1.14/Automake/Configure_ac.pm line 27.
BEGIN failed--compilation aborted at
/usr/share/automake-1.14/Automake/Configure_ac.pm line 27.
Compilation failed in require at /usr/bin/aclocal line 39.
BEGIN failed--compilation aborted at /usr/bin/aclocal line 39.
autoreconf: aclocal failed with exit status: 2
error: Bad exit status from /var/tmp/rpm-tmp.ePUGGu (%prep)

RPM build errors:
    Bad exit status from /var/tmp/rpm-tmp.ePUGGu (%prep)
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