Description:
While trying to compile qmk, I get certain errors, that I could resolve after installing one of the optional dependencies for qmk (arm-none-eabi-newlib). arm-none-eabi-newlib and arm-none-eabi-binutils are listed as
optional, but are very commonly required to build firmwares, so they should probably not be. I ran into the solution on the qmk issue tracker: https://github.com/qmk/qmk_firmware/issues/7738#issuecomment-749024497.

Additional info:
* package version(s): qmk 0.0.37-1
* config and/or log files etc.
* link to upstream bug report, if any: https://github.com/qmk/qmk_firmware/issues/7738#issuecomment-749024497

Steps to reproduce:
install qmk (pacman -S qmk)
check out qmk git repository (git clone --recurse-submodules https://github.com/qmk/qmk_firmware.git)
compile qmk for Massdrop CTRL (qmk compile -kb massdrop/ctrl -km default)

Error:
$ qmk compile -kb massdrop/ctrl -km default
Ψ Compiling keymap with make massdrop/ctrl:default


QMK Firmware 0.11.40
Making massdrop/ctrl with keymap default

arm-none-eabi-gcc (Arch Repository) 8.3.0
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Compiling: keyboards/massdrop/ctrl/matrix.c In file included from quantum/quantum.h:28,
from keyboards/massdrop/ctrl/ctrl.h:3,
from keyboards/massdrop/ctrl/matrix.c:18:
tmk_core/common/wait.h:3:10: fatal error: inttypes.h: No such file or directory
#include <inttypes.h>
^~~~~~~~~~~~
compilation terminated.
[ERRORS]
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|
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make[1]: *** [tmk_core/rules.mk:412: .build/obj_massdrop_ctrl_default/matrix.o] Error 1
Make finished with errors
make: *** [Makefile:523: massdrop/ctrl:default] Error 1