scripts: Switch to more portable Perl shebang

The default NetBSD package manager is pkgsrc and it installs Perl
along other third party programs under custom and configurable prefix.
The default prefix for binary prebuilt packages is /usr/pkg, and the
Perl executable lands in /usr/pkg/bin/perl.

This change switches "/usr/bin/perl" to "/usr/bin/env perl" as it's
the most portable solution that should work for almost everybody.
Perl's executable is detected automatically.

This change switches -w option passed to the executable with more
modern "use warnings;" approach. There is no functional change to the
default behavior.

While there, drop "require 5" from scripts/namespace.pl (Perl from 1994?).

Signed-off-by: Kamil Rytarowski <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>

Author: krytarowski

Diff for: scripts/bootgraph.pl

@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 # Copyright 2008, Intel Corporation
 #

Diff for: scripts/checkincludes.pl

@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 #
 # checkincludes: find/remove files included more than once
 #

Diff for: scripts/checkpatch.pl

@@ -1,11 +1,12 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 # (c) 2001, Dave Jones. (the file handling bit)
 # (c) 2005, Joel Schopp <[email protected]> (the ugly bit)
 # (c) 2007,2008, Andy Whitcroft <[email protected]> (new conditions, test suite)
 # (c) 2008-2010 Andy Whitcroft <[email protected]>
 # Licensed under the terms of the GNU GPL License version 2
 
 use strict;
+use warnings;
 use POSIX;
 use File::Basename;
 use Cwd 'abs_path';

Diff for: scripts/checkstack.pl

@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 #	Check the stack usage of functions
 #

Diff for: scripts/checkversion.pl

@@ -1,4 +1,4 @@
-#! /usr/bin/perl
+#! /usr/bin/env perl
 #
 # checkversion find uses of LINUX_VERSION_CODE or KERNEL_VERSION
 # without including <linux/version.h>, or cases of

Diff for: scripts/cleanfile

@@ -1,9 +1,10 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 #
 # Clean a text file -- or directory of text files -- of stealth whitespace.
 # WARNING: this can be a highly destructive operation.  Use with caution.
 #
 
+use warnings;
 use bytes;
 use File::Basename;
 

Diff for: scripts/cleanpatch

@@ -1,9 +1,10 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 #
 # Clean a patch file -- or directory of patch files -- of stealth whitespace.
 # WARNING: this can be a highly destructive operation.  Use with caution.
 #
 
+use warnings;
 use bytes;
 use File::Basename;
 

Diff for: scripts/dtc/dt_to_config

@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 # Copyright 2016 by Frank Rowand
 # Copyright 2016 by Gaurav Minocha

Diff for: scripts/export_report.pl

@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 #
 # (C) Copyright IBM Corporation 2006.
 #	Released under GPL v2.
@@ -7,6 +7,7 @@
 # Usage: export_report.pl -k Module.symvers [-o report_file ] -f *.mod.c
 #
 
+use warnings;
 use Getopt::Std;
 use strict;
 

Diff for: scripts/extract-module-sig.pl

@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 #
 # extract-mod-sig <part> <module-file>
 #
@@ -12,6 +12,7 @@
 #  -k: Just the key ID
 #  -s: Just the crypto signature or PKCS#7 message
 #
+use warnings;
 use strict;
 
 die "Format: $0 -[0adnks] module-file >out\n"

Diff for: scripts/extract-sys-certs.pl

@@ -1,5 +1,6 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 #
+use warnings;
 use strict;
 use Math::BigInt;
 use Fcntl "SEEK_SET";

Diff for: scripts/extract_xc3028.pl

@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 # Copyright (c) Mauro Carvalho Chehab <[email protected]>
 # Released under GPLv2

Diff for: scripts/get_dvb_firmware

@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 #     DVB firmware extractor
 #
 #     (c) 2004 Andrew de Quincey

Diff for: scripts/get_maintainer.pl

@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 # (c) 2007, Joe Perches <[email protected]>
 #           created from checkpatch.pl
 #
@@ -10,6 +10,7 @@
 #
 # Licensed under the terms of the GNU GPL License version 2
 
+use warnings;
 use strict;
 
 my $P = $0;

Diff for: scripts/headerdep.pl

@@ -1,4 +1,4 @@
-#! /usr/bin/perl
+#! /usr/bin/env perl
 #
 # Detect cycles in the header file dependency graph
 # Vegard Nossum <[email protected]>

Diff for: scripts/headers_check.pl

@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 #
 # headers_check.pl execute a number of trivial consistency checks
 #
@@ -18,6 +18,7 @@
 #
 # 3) Check for leaked CONFIG_ symbols
 
+use warnings;
 use strict;
 use File::Basename;
 

Diff for: scripts/kconfig/streamline_config.pl

@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 #
 # Copyright 2005-2009 - Steven Rostedt
 # Licensed under the terms of the GNU GPL License version 2
@@ -42,6 +42,7 @@
 #    mv config_strip .config
 #    make oldconfig
 #
+use warnings;
 use strict;
 use Getopt::Long;
 

Diff for: scripts/kernel-doc

@@ -1,5 +1,6 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 
+use warnings;
 use strict;
 
 ## Copyright (c) 1998 Michael Zucchi, All Rights Reserved        ##

Diff for: scripts/kernel-doc-xml-ref

@@ -1,5 +1,6 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 
+use warnings;
 use strict;
 
 ## Copyright (C) 2015  Intel Corporation                         ##

Diff for: scripts/markup_oops.pl

@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 use File::Basename;
 use Math::BigInt;

Diff for: scripts/namespace.pl

@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 #
 #	namespace.pl.  Mon Aug 30 2004
 #
@@ -62,7 +62,7 @@
 #	  result.
 #
 
-require 5;	# at least perl 5
+use warnings;
 use strict;
 use File::Find;
 

Diff for: scripts/profile2linkerlist.pl

@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 #
 # Takes a (sorted) output of readprofile and turns it into a list suitable for

Diff for: scripts/recordmcount.pl

@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 # (c) 2008, Steven Rostedt <[email protected]>
 # Licensed under the terms of the GNU GPL License version 2
 #
@@ -106,6 +106,7 @@
 # 9) Move the result back to the original object.
 #
 
+use warnings;
 use strict;
 
 my $P = $0;

Diff for: scripts/stackdelta

@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 # Read two files produced by the stackusage script, and show the
 # delta between them.