ports/151140: USE_PERL5_BUILD in lang/gcc* ports fails to compile

[Jack]

>Number:         151140
>Category:       ports
>Synopsis:       USE_PERL5_BUILD in lang/gcc* ports fails to compile
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Oct 01 13:20:01 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     Jack
>Release:        8.1-STABLE
>Organization:
>Environment:
FreeBSD upstairs.jack.com 8.1-STABLE FreeBSD 8.1-STABLE #0: Sun Sep 19 09:41:42 PDT 2010     jack at upstairs.jack.com:/usr/home/jack/files/usr/src/sys/UPSTAIRS  amd64

>Description:
When trying to compile gcc* ports and you have PERL_VERSION=5.12.1 in make.conf, it will try to reinstall perl and then build gcc even if perl is already installed.
>How-To-Repeat:
compile gcc port with perl 5.12.1 installed
>Fix:
Remove USE_PERL5_BUILD and make it depend on perl instead

>Release-Note:
>Audit-Trail:
>Unformatted: