Proposed feature: die on compile with undefined functions

Hello,

*1. Here is a problem*
Scripts that have undeclared subroutines will run, even though the
subroutines are not declared/loaded/whatever:

use strict;
use autodie ':all';
use warnings FATAL => 'all';
print "code is running\n";
#... very long code that takes hours to run
my @x = (1,2,3);
my $m = max(@x);
*2. Here is the syntax that I'm proposing*

There are no syntax changes.  The only change is that undefined subroutines
would be treated the same way that undefined scalars are treated.

I want perl to check for the undefined function max before running the
script, similarly to the way that this 1-line script:

print "$x\n";

would die before execution with the error: Global symbol "$x" requires
explicit package name (did you forget to declare "my $x"?) at die.sooner.pl
line 8.

*3. Here are the benefits of this*

This change would cause scripts that will certainly die anyway, to die
before running, thus saving (potentially a lot of) time.

*4. Here are potential problems*

I am unaware of any.  I just want something that will happen anyway to
happen sooner to save time.  This change *shouldn't *be buggy.