Latest gcc complains about duplicated definition

[cibersheep]

gcc (Ubuntu 13.2.0-23ubuntu4) 13.2.0 complains about libFile definition, I've read that adding externto the second definition should fix this

gcc  -o ngpc condacto.o errores.o generar.o lexico.o objetos.o procesos.o salidas.o sintacti.o cjs.o textos.o vocabula.o cfgvars.o 
/usr/bin/ld: generar.o:(.bss+0x20): multiple definition of `libFile'; condacto.o:(.bss+0x3000): first defined here
collect2: error: ld returned 1 exit status

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