`riscv-rt`: Duplicate symbol when linking with Newlib

[gmmyung]

Hi, I am trying to use a C library that depends on Newlib with rust. This code block seems to generate the abort symbol, but this collides with the libc abort() symbol. Is it possible for the riscv-rt crate to change the name of the symbol to something else?

riscv/riscv-rt/src/asm.rs

Lines 337 to 343 in 27c4faf

	#[rustfmt::skip]
	global_asm!(
	".section .text.abort
	.global abort
	abort: // make sure there is an abort symbol when linking
	j abort"
	);

[romancardenas]

Right now that is not possible. But it could be easily fixed by defining the abort symbol as weak in the assembly. In this way, the symbol would get overwritten by your C lib.