my $data =  '#define MANUFACTURER   "xyz"';
my $replace = '#define MANUFACTURER(\s+)"xyz"';
my $replace_with =  '#define MANUFACTURER$1"abcd"';

$data =~ s/$replace/$replace_with/g;;

print $data;

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Expected Output is : #define MANUFACTURER "abcd" (with appropriate number of spaces)

But the output that i am geting is: #define MANUFACTURER$1"abcd"

In the actual usage scenario, variables $data, $replace and $replace_with are read from a file. How to get the expected output?

In reply to Problem with Pattern matching and substitution using variables by shtihskar

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