turns out armv4t doesnt work

.cargo/config.toml

@@ -3,7 +3,7 @@ build-std = ["core"]
 build-std-features = ["compiler-builtins-weak-intrinsics"]
 
 [build]
-target = "armv4t-none-eabi"
+target = "thumbv4t-none-eabi"
 
 [target.thumbv4t-none-eabi]
 rustflags = ["-Clink-arg=-Tmono_boot.ld", "-Ctarget-cpu=arm7tdmi"]

src/main.rs

@@ -3,18 +3,12 @@
 #![no_std]
 #![no_main]
 
-use ape_fatfs::{
-    error::Error,
-    fs::{FileSystem, FsOptions},
-};
+use ape_fatfs::fs::{FileSystem, FsOptions};
 use ape_mbr::{PartitionId, MBR};
-use embedded_io::blocking::Read;
 use fs::BufferedIo;
 use gba::prelude::*;
 use sd::SdCard;
 
-use crate::sd::BlockIo;
-
 mod dma;
 mod ezflash;
 mod fs;