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.

Signed-off-by: Kamil Rytarowski <n54@gmx.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

8 files changed, 15 insertions, 8 deletions

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index f084542934..3bb6fc95bd 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;
 
 my $P = $0;
 $P =~ s@.*/@@g;
diff --git a/scripts/clean-header-guards.pl b/scripts/clean-header-guards.pl
index 54ab99ae29..5e67f1998c 100755
--- a/scripts/clean-header-guards.pl
+++ b/scripts/clean-header-guards.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 #
 # Clean up include guards in headers
 #
@@ -28,6 +28,7 @@
 #   "cc -E -DGUARD_H -c -P -", and fed the test program on stdin.
 
 use strict;
+use warnings;
 use Getopt::Std;
 
 # Stuff we don't want to clean because we import it into our tree:
diff --git a/scripts/cleanup-trace-events.pl b/scripts/cleanup-trace-events.pl
index 7e808efb6a..e93abc00da 100755
--- a/scripts/cleanup-trace-events.pl
+++ b/scripts/cleanup-trace-events.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 # Copyright (C) 2013 Red Hat, Inc.
 #
 # Authors:
diff --git a/scripts/disas-objdump.pl b/scripts/disas-objdump.pl
index 8f7e8182a1..bec905f04b 100755
--- a/scripts/disas-objdump.pl
+++ b/scripts/disas-objdump.pl
@@ -1,4 +1,6 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
+
+use warnings;
 
 use File::Temp qw/ tempfile /;
 use Getopt::Long;
diff --git a/scripts/get_maintainer.pl b/scripts/get_maintainer.pl
index 8261bcb1ad..d7c2311123 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
 #
@@ -11,6 +11,7 @@
 # Licensed under the terms of the GNU GPL License version 2
 
 use strict;
+use warnings;
 
 my $P = $0;
 my $V = '0.26';
diff --git a/scripts/shaderinclude.pl b/scripts/shaderinclude.pl
index 81b5146332..cd3bb40b12 100644
--- a/scripts/shaderinclude.pl
+++ b/scripts/shaderinclude.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 use strict;
 use warnings;
 
diff --git a/scripts/switch-timer-api b/scripts/switch-timer-api
index b0e230b9f1..41736d11dd 100755
--- a/scripts/switch-timer-api
+++ b/scripts/switch-timer-api
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 use strict;
 use warnings;
diff --git a/scripts/texi2pod.pl b/scripts/texi2pod.pl
index 6e8fec41a1..39ce584a32 100755
--- a/scripts/texi2pod.pl
+++ b/scripts/texi2pod.pl
@@ -1,4 +1,4 @@
-#! /usr/bin/perl -w
+#! /usr/bin/env perl
 
 #   Copyright (C) 1999, 2000, 2001, 2003 Free Software Foundation, Inc.
 
@@ -22,6 +22,8 @@
 # markup to Perl POD format.  It's intended to be used to extract
 # something suitable for a manpage from a Texinfo document.
 
+use warnings;
+
 $output = 0;
 $skipping = 0;
 %sects = ();