Cannot find entry symbol _start

Question

My c code on compiling on gcc is giving the error Cannot find entry symbol _start defaulting to 00000. Can anyone tell me why and how to correct it?

The com

Answer 1

the -none- part means that your toolchain doesn't build for a particular operating system, so you must define a _start entry point. For non-bare-metal toolchains that build for a particular operating system, _start is provided by the standard library that in order will call main when everything is set up.