scripts/enum-extract.pl should not hard code perl path

This is a portability issue. The issue had already been fixed for
scripts/cstyle.pl by 2dbf1bf8296f66f24d5e404505c991bfbeec7808.
scripts/enum-extract.pl was added to the repository the following year
without this portability fix.

Michael Bishop informed me that this broke his attempt to build ZFS
2.1.6 on NixOS, since he was building manually outside of their package
manager (that usually rewrites the shebangs to NixOS' unusual paths).
NixOS puts all of the paths into $PATH, so scripts that portably rely
on env to find the interpreter still work.

Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #14012

diff --git a/scripts/enum-extract.pl b/scripts/enum-extract.pl
index 5112cc807f678055135bb046a3f67a474ce94c2e..5dc2e34551452ef22e02c49f27dbff92a48cdb90 100755 (executable)
--- a/scripts/enum-extract.pl
+++ b/scripts/enum-extract.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 
 my $usage = <<EOT;
 usage: config-enum enum [file ...]