Cscope is an interactive program that locates specified elements of code in C, lex, or yacc source files. With Cscope, you can search and edit your source files more efficiently than you could with a typical editor.

When Cscope is called for a set of C, lex, or yacc source files, it builds a symbol cross-reference table for the functions, function calls, macros, variables, and preprocessor symbols in those files. You can then query that table about the locations of symbols you specify. First, it presents a menu and asks you to choose the type of search you would like to have performed. You may, for instance, want Cscope to find all the functions that call a specified function.