Ok, I've already fixed this....But I have a newbie question: what's the gcc command to build the files and execute them? How could it be a makefile? Thanks again! On Tue, 8 Mar 2005 09:10:49 -0600, Martin York <martin.york@xxxxxxxxxxx> wrote: > > In file teste2.c > > extern void f1(void); // It must be declared extern in this file aswell > // before it is defined. > void f1(){ > printf("Função contida no arquivo teste2.c...\n"); } > > // variável global externa > > // Need to make sure the compiler knowns it is this x that is extern. > extern int x; > int x = 12; > > > -- ---------------------------------------- Marcelo Monteiro Custódio System Analyst and Developer DBA Engenharia de Sistemas