[cliffbean]

> If your code lacks the declaration of the function, the compiler will assume pre ANSI-C semantics and generate code returning an int.

Better, please help by compiling your C code with -Wimplicit-function-declaration (included in -Wall), and fixing all the problems it reports. Then you won't have to worry about this problem, or a bunch of other problems.

[wuest]

All-too-common response: "Oh, but they're just warnings mumble compiles and runs 'cleanly' mumble..."

[duaneb]

    -Wall -Wextra -Werror