gcc o3 optimization not working

My code compiled fine with -o optimization, but it gives the following errors with -o3 optimization:

Code:

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/usr/bin/ld: bug: stdout: invalid version 2 (max 0)
bug: error adding symbols: Bad value
collect2: error: ld returned 1 exit status
makefile:2: recipe for target 'all' failed

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I looked the error up and there aren't a lot of resources on it... Execution speed is crucial for my program and I would appreciate a level 3 optimization as opposed to level 1... Any ideas as to how to fix it?

Just in case, let's clarify: you passed -O3 rather than -o3 as an option, right?

NVM I did something stupid... :frown:
I accidentally used lower case o in my makefile, as opposed to O...