From 121d9dc468264cedaccf3de761da35f313bda30b Mon Sep 17 00:00:00 2001
From: Chris Rees <crees@FreeBSD.org>
Date: Sun, 1 Jul 2012 16:38:22 +0000
Subject: [PATCH] Don't clobber USE_PERL5 values when USE_PERL5 is set.

Example of the problems caused:

http://lists.freebsd.org/pipermail/freebsd-ports/2012-May/075194.html

PR:		ports/168379
Submitted by:	crees
Reviewed by:	Silence on perl@ for over a month
---
 Mk/bsd.perl.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Mk/bsd.perl.mk b/Mk/bsd.perl.mk
index 541c4f34fa06..757b52eb0373 100644
--- a/Mk/bsd.perl.mk
+++ b/Mk/bsd.perl.mk
@@ -170,7 +170,7 @@ CONFIGURE_ARGS+=	INSTALLDIRS="site"
 .endif # defined(PERL_MODBUILD)
 
 .if defined(PERL_CONFIGURE)
-USE_PERL5=	yes
+USE_PERL5?=	yes
 # Disable AutoInstall from attempting to install from CPAN directly in
 # the case of missing dependencies.  This causes the build to loop on
 # the build cluster asking for interactive input.