crt0o
crt0.o is a startup object file used by many C toolchains, including GCC, to provide the program’s initial runtime entry. It is part of the C runtime startup sequence and is normally linked in automatically by the compiler driver as part of building a C program. The standard file is named crt0.o (with a dot); some contexts or build configurations may refer to a variant as crt0o, but the conventional runtime file uses the period.
The primary role of crt0.o is to supply the program entry point, typically the symbol _start, which
crt0.o is part of a family of startup and runtime objects that may also include crt1.o, crti.o,
In practice, developers rarely interact with crt0.o directly; it is a built artifact of the toolchain. Removing