#!/usr/bin/perl

my $line = <DATA>;
chomp $line;

my $options = {};

for (split /(?=\s\S+\s*=)/, $line) {
    my ($option, $value) = split /=/, $_;

    $option =~ s/^\s+//;
    $option =~ s/\s+$//;

    $options->{$option} = $value;
}

use Data::Dumper;
print Dumper $options;

__DATA__
option1 = value0 value1 value2 option3 =value3 value4 option2=value5
__END__
$VAR1 = {
          'option1' => ' value0 value1 value2',
          'option3' => 'value3 value4',
          'option2' => 'value5'
        };