Hello wise monks,
This is my first question to the monastery, although I've been silently lurking here for a while...
Anyway. I am reading (from a configuration file) a list of expressions to evaluate.
I am reading these into a hash where the hash key may be one of the variable in the expression it associated to or may not.
The configuration file looks like this

x ++$x
y int(((log10 ($x/100 + 1)) + 3)*100)
z $x+$y+$z
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and so the hash turns out like this:

$function_hash{"x"}="++$x";
$function_hash{"y"}="int(((log10 ($x/100 + 1)) + 3)*100)";
$function_hash{"z"}="$x+$y+$z";
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Now, I am getting values for the variable through a proprietary communication protocol (which is,btw, the real complicated part of that program, but it's not relevant now).
So I'm ending up with another hash that have:

$value_hash{"x"} = 10;
$value_hash{"z"} = 30;
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It may or may not contain all the variables I have functions for.
I am using the module Alias to turn all the field names in the value hash into local variables (with attr) and then I am doing eval on the entries in the %function_hash to get what I need.
It works nice except for those warnings "Use of uninitialized value..." which happens since I use strict.
I cannot use vars with the variables I have in the value hash since I know them only at run time (from the config file).
I don't want to use something like:

$Alias::AttrPrefix = "main::";
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since then the functions in the configuration will need to be written differently or go through some parsing I don't want to do...
Please help (and I want to go on using strict...)
Thanks in advanced!!