fix math/PDL build

[Joerg Pulz]

>Submitter-Id:	current-users
>Originator:	Joerg Pulz
>Organization:	TU-Munich / ZWE FRM-II
>Confidential:	no 
>Synopsis:	fix math/PDL build
>Severity:	serious
>Priority:	medium
>Category:	ports
>Class:		change-request
>Release:	FreeBSD 6.1-PRERELEASE i386
>Environment:
System: FreeBSD hades.admin.frm2 6.1-PRERELEASE FreeBSD 6.1-PRERELEASE #11: Wed Feb 22 19:01:44 CET 2006 root at hades.admin.frm2:/usr/obj/usr/src/sys/HADES i386


	
>Description:
	This port is reported to produce errors during the build
	see:
	http://pointyhat.freebsd.org/errorlogs/i386-6-latest/

	Attached is a solution which solves the problem, at least
	here on my machine.
>How-To-Repeat:
	
>Fix:

	add the following lines to math/PDL/Makefile

	USE_GMAKE=	yes
	MAKE_ENV=	PERL5LIB=${WRKSRC}/blib/lib