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package pm1187349;
use warnings;
...
sub someFunction {
    print "I am some function\n";
}

use warnings;
use strict;
...
# use them
pm1187349::someFunction();
print "someScalar = ${pm1187349::someScalar}\n";

use warnings;
use strict;
...
# use them
someFunction();
print "someScalar = ${someScalar}\n";