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 <n54@gmx.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

24 files changed, 37 insertions, 25 deletions

diff --git a/scripts/bootgraph.pl b/scripts/bootgraph.pl
index 9ca667bcaee9..594c55541b16 100755
--- a/scripts/bootgraph.pl
+++ b/scripts/bootgraph.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 # Copyright 2008, Intel Corporation
 #
diff --git a/scripts/checkincludes.pl b/scripts/checkincludes.pl
index 381c018a4612..ce9edefd6e0b 100755
--- a/scripts/checkincludes.pl
+++ b/scripts/checkincludes.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 #
 # checkincludes: find/remove files included more than once
 #
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 4b9569fa931b..3465a7c5a154 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 # (c) 2001, Dave Jones. (the file handling bit)
 # (c) 2005, Joel Schopp <jschopp@austin.ibm.com> (the ugly bit)
 # (c) 2007,2008, Andy Whitcroft <apw@uk.ibm.com> (new conditions, test suite)
@@ -6,6 +6,7 @@
 # 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 --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index 9d37aa4faf5c..7f4c41717e26 100755
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 #       Check the stack usage of functions
 #
diff --git a/scripts/checkversion.pl b/scripts/checkversion.pl
index 5e490a8ceca5..8b4f205234b5 100755
--- a/scripts/checkversion.pl
+++ b/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 --git a/scripts/cleanfile b/scripts/cleanfile
index cefd29e52298..72e3755327ae 100755
--- a/scripts/cleanfile
+++ b/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 --git a/scripts/cleanpatch b/scripts/cleanpatch
index 9680d03ad2b8..3e5a2303dc0e 100755
--- a/scripts/cleanpatch
+++ b/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 --git a/scripts/dtc/dt_to_config b/scripts/dtc/dt_to_config
index 9a248b505c58..5dfd1bff351f 100755
--- a/scripts/dtc/dt_to_config
+++ b/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 --git a/scripts/export_report.pl b/scripts/export_report.pl
index 8f79b701de87..68ff426b347c 100755
--- a/scripts/export_report.pl
+++ b/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 --git a/scripts/extract-module-sig.pl b/scripts/extract-module-sig.pl
index faac6f2e377f..0f161ea41261 100755
--- a/scripts/extract-module-sig.pl
+++ b/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 --git a/scripts/extract-sys-certs.pl b/scripts/extract-sys-certs.pl
index 8227ca10a494..2aa873b944e0 100755
--- a/scripts/extract-sys-certs.pl
+++ b/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 --git a/scripts/extract_xc3028.pl b/scripts/extract_xc3028.pl
index 47877deae6d7..61d9b256c658 100755
--- a/scripts/extract_xc3028.pl
+++ b/scripts/extract_xc3028.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 # Copyright (c) Mauro Carvalho Chehab <mchehab@infradead.org>
 # Released under GPLv2
diff --git a/scripts/get_dvb_firmware b/scripts/get_dvb_firmware
index 1a0a04125f71..f3f230225aba 100755
--- a/scripts/get_dvb_firmware
+++ b/scripts/get_dvb_firmware
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 #     DVB firmware extractor
 #
 #     (c) 2004 Andrew de Quincey
diff --git a/scripts/get_maintainer.pl b/scripts/get_maintainer.pl
index 633f2dd3de27..3bd5f4f30235 100755
--- a/scripts/get_maintainer.pl
+++ b/scripts/get_maintainer.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 # (c) 2007, Joe Perches <joe@perches.com>
 #           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 --git a/scripts/headerdep.pl b/scripts/headerdep.pl
index 8dd019bc5a73..86ebb9ee7570 100755
--- a/scripts/headerdep.pl
+++ b/scripts/headerdep.pl
@@ -1,4 +1,4 @@
-#! /usr/bin/perl
+#! /usr/bin/env perl
 #
 # Detect cycles in the header file dependency graph
 # Vegard Nossum <vegardno@ifi.uio.no>
diff --git a/scripts/headers_check.pl b/scripts/headers_check.pl
index 8b2da054cdc3..3091e4ee6ee1 100755
--- a/scripts/headers_check.pl
+++ b/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 --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
index b8c7b29affc5..a2e83ab17de3 100755
--- a/scripts/kconfig/streamline_config.pl
+++ b/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 --git a/scripts/kernel-doc b/scripts/kernel-doc
index a26a5f2dce39..7b0a8f01fed5 100755
--- a/scripts/kernel-doc
+++ b/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 --git a/scripts/kernel-doc-xml-ref b/scripts/kernel-doc-xml-ref
index 104a5a5ba2c8..e3b24bfc804c 100755
--- a/scripts/kernel-doc-xml-ref
+++ b/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 --git a/scripts/markup_oops.pl b/scripts/markup_oops.pl
index c21d16328d3f..70dcfb6b3de1 100755
--- a/scripts/markup_oops.pl
+++ b/scripts/markup_oops.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 use File::Basename;
 use Math::BigInt;
diff --git a/scripts/namespace.pl b/scripts/namespace.pl
index 9f3c9d47a4a5..729c547fc9e1 100755
--- a/scripts/namespace.pl
+++ b/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 --git a/scripts/profile2linkerlist.pl b/scripts/profile2linkerlist.pl
index 6943fa7cc95b..f23d7be94394 100755
--- a/scripts/profile2linkerlist.pl
+++ b/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 --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl
index 1633c3e6c0b9..2033af758173 100755
--- a/scripts/recordmcount.pl
+++ b/scripts/recordmcount.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 # (c) 2008, Steven Rostedt <srostedt@redhat.com>
 # 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 --git a/scripts/stackdelta b/scripts/stackdelta
index 48eabf2f48f8..20a79f19a111 100755
--- a/scripts/stackdelta
+++ b/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.