> From: R <http://www.dracomp.com/~R> > Date: Thu, 05 Jun 2008 15:20:29 -0400 > > When I type sudo GCC file.c it comes back with "Incompatible implicit > declaration of built-in function strlen" also strcmp, strcat. > I have them from the old Slakware. Can I transfer them over to the Ubuntu? > D That's odd that it would work on the old system and not this one. The man page for strlen() says that you need to include "string.h", i.e., #include <string.h> in your C program. Try that.