error: linker `cc` not found [Makefile:123: target/aarch64-unknown-none-softfloat/release/kernel] Error 101

[NoahPN]

Compiling kernel ELF - rpi3
   Compiling atmos v0.2.0 (/mnt/c/Users/noahp/OneDrive/Desktop/osdev/rust-raspberrypi-OS-tutorials/atmos)      
error: linking with `rust-lld` failed: exit status: 1
  |
  = note: "rust-lld" "-flavor" "gnu" "/tmp/rustcqhmSRS/symbols.o" "/mnt/c/Users/noahp/OneDrive/Desktop/osdev/rust-raspberrypi-OS-tutorials/atmos/target/aarch64-unknown-none-softfloat/release/deps/kernel-2087bfae60d86e28.kernel.660737e9-cgu.1.rcgu.o" "--as-needed" "-L" "/mnt/c/Users/noahp/OneDrive/Desktop/osdev/rust-raspberrypi-OS-tutorials/atmos/target/aarch64-unknown-none-softfloat/release/deps" "-L" "/mnt/c/Users/noahp/OneDrive/Desktop/osdev/rust-raspberrypi-OS-tutorials/atmos/target/release/deps" "-L" "/root/.rustup/toolchains/nightly-2022-10-13-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-none-softfloat/lib" "-Bstatic" "/root/.rustup/toolchains/nightly-2022-10-13-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-none-softfloat/lib/libcompiler_builtins-a3fd61d6b092195d.rlib" "-Bdynamic" "--eh-frame-hdr" "-znoexecstack" "-L" "/root/.rustup/toolchains/nightly-2022-10-13-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-none-softfloat/lib" "-o" "/mnt/c/Users/noahp/OneDrive/Desktop/osdev/rust-raspberrypi-OS-tutorials/atmos/target/aarch64-unknown-none-softfloat/release/deps/kernel-2087bfae60d86e28" "--gc-sections" "-O1" "--library-path=/mnt/c/Users/noahp/OneDrive/Desktop/osdev/rust-raspberrypi-OS-tutorials/atmos/src/boards/raspberrypi" "--script=kernel.ld"       
  = note: rust-lld: error: undefined symbol: BOOT_CORE_ID
          >>> referenced by kernel.660737e9-cgu.1
          >>>               /mnt/c/Users/noahp/OneDrive/Desktop/osdev/rust-raspberrypi-OS-tutorials/atmos/target/aarch64-unknown-none-softfloat/release/deps/kernel-2087bfae60d86e28.kernel.660737e9-cgu.1.rcgu.o:(_start)

error: could not compile `atmos` due to previous error
make: *** [Makefile:123: target/aarch64-unknown-none-softfloat/release/kernel] Error 101

Hi, I am at chapter 3 and when I use make qemu I get that error above.

Here is line 123 of the Makefile: @RUSTFLAGS="$(RUSTFLAGS_PEDANTIC)" $(RUSTC_CMD)

Please help.

Noah

[pooladkhay]

This should fix your issue:
https://stackoverflow.com/a/66598982/5852071