how to assamble the C code in asm code ?

[joekerrXie]

i want to build a asm code can call C function . but return some error , how can i assemble the C code in asm code ?

`.text
.global _start
.global foo

_start:
la sp, stack_end
li a0 ,1
li a1 ,2
call foo

stop:
j stop
nop

stack_start:
.rept 10
.word 0
.endr
stack_end:
.end`
ERROR: column 9: "foo" declared global label but not defined.

[Nado15]

Assuming it runs bare metal:

You have to declare your function "foo" in a c file and then compile the assembly file and the c file separately. You need your own linker script as well

Here is a good explanation (you just need to follow the upper part of the answer not all)

https://stackoverflow.com/a/58588918