Also, use gdb-multiarch as cargo runner, as it's the easiest for Debian.
@ -1,5 +1,8 @@
[target.thumbv7em-none-eabihf]
runner = 'arm-none-eabi-gdb'
#runner = 'arm-none-eabi-gdb'
runner = 'gdb-multiarch'
rustflags = [
"-C", "link-arg=-Tlink.x", "-C", "inline-threshold=255",
]
[build]
target = "thumbv7em-none-eabihf"