gfortran: Error in finding path

FATAL:/opt/local/bin/../libexec/as/x86_64/as: I don't understand 'm' flag!

Soln: Path in first line modified to path in second line

#export PATH="/opt/local/bin:/opt/local/sbin:$PATH"
export PATH="/usr/bin:/opt/local/bin:/opt/local/sbin:$PATH"