$NetBSD: patch-aa,v 1.7 2015/09/23 06:43:48 mef Exp $

(1)
Incompatible change in the newer ExtUtils-MakeMaker:
It places .o files where the source file lives (lib/File/ in this case),
whereas the older MakeMaker placed it in the current working dir
(toplevel in this case). 

Thanks Matthias Ferdinand 
http://mail-index.netbsd.org/pkgsrc-users/2015/09/19/msg022238.html

(2)
-- Ensure we use the required ldflags for the platform.

--- Makefile.PL.orig	2015-09-23 15:35:22.000000000 +0900
+++ Makefile.PL	2015-09-23 15:36:22.000000000 +0900
@@ -21,8 +21,8 @@ my %WriteMakefileArgs = (
   },
   "DISTNAME" => "File-LibMagic",
   "INC" => "-I. -Ic",
-  "LDFROM" => "LibMagic\$(OBJ_EXT)",
-  "LIBS" => "-lmagic",
+  "LDFROM" => "lib/File/LibMagic\$(OBJ_EXT)",
+  'LIBS' => "$ENV{LDFLAGS}  -lmagic -lz", # e.g., '-lm'
   "LICENSE" => "perl",
   "MIN_PERL_VERSION" => "5.008",
   "NAME" => "File::LibMagic",