--- a/make-rules/shared-macros.mk	Thu Jun 13 20:08:09 2013 +0100
+++ b/make-rules/shared-macros.mk	Thu Jun 13 19:36:46 2013 -0700
@@ -313,10 +313,12 @@
 
 PERL.5.8.4 =    /usr/perl5/5.8.4/bin/perl
 PERL.5.12 =     /usr/perl5/5.12/bin/perl
+PERL.5.12-mt =	/usr/perl5/5.12/bin/perl-threaded
 
 PERL =          $(PERL.$(PERL_VERSION))
 
 PERL_ARCH :=     $(shell $(PERL) -e 'use Config; print $$Config{archname}')
+PERL_ARCH_FUNC=	$(shell $(1) -e 'use Config; print $$Config{archname}')
 # Optimally we should ask perl which C compiler was used but it doesn't
 # result in a full path name.  Only "c" is being recorded
 # inside perl builds while we actually need a full path to