[riot-notifications] [RIOT-OS/RIOT] makefile: Fix usage error with busybox grep (#15852)

nmeum notifications at github.com
Mon Jan 25 10:44:55 CET 2021

Busybox grep does not support long options. In fact, the utilized long options are not mandated by POSIX.1-2008. Using the short options allows cross compiling RIOT applications on Alpine Linux which utilizes Busybox instead of GNU coreutils by default.

CC: @maribu 
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-- Commit Summary --

  * makefile: Fix usage error with busybox grep

-- File Changes --

    M makefiles/usb-codes.inc.mk (2)

-- Patch Links --


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