#!/bin/sh
|
# SPDX-License-Identifier: GPL-2.0-or-later
|
#
|
# Copyright (C) 2017 Imagination Technologies
|
# Author: Paul Burton <paul.burton@mips.com>
|
#
|
# This script merges configuration fragments for boards supported by the
|
# generic MIPS kernel. It checks each for requirements specified using
|
# formatted comments, and then calls merge_config.sh to merge those
|
# fragments which have no unmet requirements.
|
#
|
# An example of requirements in your board config fragment might be:
|
#
|
# # require CONFIG_CPU_MIPS32_R2=y
|
# # require CONFIG_CPU_LITTLE_ENDIAN=y
|
#
|
# This would mean that your board is only included in kernels which are
|
# configured for little endian MIPS32r2 CPUs, and not for example in kernels
|
# configured for 64 bit or big endian systems.
|
#
|
|
srctree="$1"
|
objtree="$2"
|
ref_cfg="$3"
|
cfg="$4"
|
boards_origin="$5"
|
shift 5
|
|
# Only print Skipping... lines if the user explicitly specified BOARDS=. In the
|
# general case it only serves to obscure the useful output about what actually
|
# was included.
|
case ${boards_origin} in
|
"command line")
|
print_skipped=1
|
;;
|
environment*)
|
print_skipped=1
|
;;
|
*)
|
print_skipped=0
|
;;
|
esac
|
|
for board in $@; do
|
board_cfg="${srctree}/arch/mips/configs/generic/board-${board}.config"
|
if [ ! -f "${board_cfg}" ]; then
|
echo "WARNING: Board config '${board_cfg}' not found"
|
continue
|
fi
|
|
# For each line beginning with # require, cut out the field following
|
# it & search for that in the reference config file. If the requirement
|
# is not found then the subshell will exit with code 1, and we'll
|
# continue on to the next board.
|
grep -E '^# require ' "${board_cfg}" | \
|
cut -d' ' -f 3- | \
|
while read req; do
|
case ${req} in
|
*=y)
|
# If we require something =y then we check that a line
|
# containing it is present in the reference config.
|
grep -Eq "^${req}\$" "${ref_cfg}" && continue
|
;;
|
*=n)
|
# If we require something =n then we just invert that
|
# check, considering the requirement met if there isn't
|
# a line containing the value =y in the reference
|
# config.
|
grep -Eq "^${req/%=n/=y}\$" "${ref_cfg}" || continue
|
;;
|
*)
|
echo "WARNING: Unhandled requirement '${req}'"
|
;;
|
esac
|
|
[ ${print_skipped} -eq 1 ] && echo "Skipping ${board_cfg}"
|
exit 1
|
done || continue
|
|
# Merge this board config fragment into our final config file
|
${srctree}/scripts/kconfig/merge_config.sh \
|
-m -O ${objtree} ${cfg} ${board_cfg} \
|
| grep -Ev '^(#|Using)'
|
done
|
