RAFFAELE COTZA <cotza@unica.it> writes: > > 134net199:~/INGEGNERIA/FORTRAN raffaelecotza$ gfortran fibre.f95 > -lstdc++ -o./fibre.out > /usr/bin/ld: unknown flag: -o./fibre.out > collect2: ld returned 1 exit status Try: gfortran fibre.f95 -lstdc++ -o fibre.out with a space between "-o" and "fibre.out". zw