1#!/bin/sh 2# merge_config.sh - Takes a list of config fragment values, and merges 3# them one by one. Provides warnings on overridden values, and specified 4# values that did not make it to the resulting .config file (due to missed 5# dependencies or config symbol removal). 6# 7# Portions reused from kconf_check and generate_cfg: 8# http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/kconf_check 9# http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/generate_cfg 10# 11# Copyright (c) 2009-2010 Wind River Systems, Inc. 12# Copyright 2011 Linaro 13# 14# This program is free software; you can redistribute it and/or modify 15# it under the terms of the GNU General Public License version 2 as 16# published by the Free Software Foundation. 17# 18# This program is distributed in the hope that it will be useful, 19# but WITHOUT ANY WARRANTY; without even the implied warranty of 20# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 21# See the GNU General Public License for more details. 22 23clean_up() { 24 rm -f $TMP_FILE 25 exit 26} 27trap clean_up HUP INT TERM 28 29usage() { 30 echo "Usage: $0 [OPTIONS] [CONFIG [...]]" 31 echo " -h display this help text" 32 echo " -m only merge the fragments, do not execute the make command" 33 echo " -n use allnoconfig instead of alldefconfig" 34 echo " -r list redundant entries when merging fragments" 35 echo " -O dir to put generated output files. Consider setting \$KCONFIG_CONFIG instead." 36 echo " -e colon-separated list of br2-external trees to use (optional)" 37 echo 38 echo "Used prefix: '$CONFIG_PREFIX'. You can redefine it with \$CONFIG_ 39 environment variable." 40} 41 42RUNMAKE=true 43ALLTARGET=alldefconfig 44WARNREDUN=false 45OUTPUT=. 46CONFIG_PREFIX=${CONFIG_-CONFIG_} 47 48while true; do 49 case $1 in 50 "-n") 51 ALLTARGET=allnoconfig 52 shift 53 continue 54 ;; 55 "-m") 56 RUNMAKE=false 57 shift 58 continue 59 ;; 60 "-h") 61 usage 62 exit 63 ;; 64 "-r") 65 WARNREDUN=true 66 shift 67 continue 68 ;; 69 "-O") 70 if [ -d $2 ];then 71 OUTPUT=$(echo $2 | sed 's/\/*$//') 72 else 73 echo "output directory $2 does not exist" 1>&2 74 exit 1 75 fi 76 shift 2 77 continue 78 ;; 79 "-e") 80 EXTERNAL_ARG="BR2_EXTERNAL=$2" 81 shift 2 82 continue 83 ;; 84 *) 85 break 86 ;; 87 esac 88done 89 90if [ "$#" -lt 1 ] ; then 91 usage 92 exit 93fi 94 95if [ -z "$KCONFIG_CONFIG" ]; then 96 if [ "$OUTPUT" != . ]; then 97 KCONFIG_CONFIG=$(readlink -m -- "$OUTPUT/.config") 98 else 99 KCONFIG_CONFIG=.config 100 fi 101fi 102 103INITFILE=$1 104shift; 105 106if [ ! -r "$INITFILE" ]; then 107 echo "The base file '$INITFILE' does not exist. Exit." >&2 108 exit 1 109fi 110 111MERGE_LIST=$* 112SED_CONFIG_EXP1="s/^\(${CONFIG_PREFIX}[a-zA-Z0-9_]*\)=.*/\1/p" 113SED_CONFIG_EXP2="s/^# \(${CONFIG_PREFIX}[a-zA-Z0-9_]*\) is not set$/\1/p" 114 115TMP_FILE=$(mktemp -t .tmp.config.XXXXXXXXXX) 116 117echo "Using $INITFILE as base" 118cat $INITFILE > $TMP_FILE 119 120# Merge files, printing warnings on overridden values 121for MERGE_FILE in $MERGE_LIST ; do 122 echo "Merging $MERGE_FILE" 123 if [ ! -r "$MERGE_FILE" ]; then 124 echo "The merge file '$MERGE_FILE' does not exist. Exit." >&2 125 exit 1 126 fi 127 CFG_LIST=$(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $MERGE_FILE) 128 129 for CFG in $CFG_LIST ; do 130 grep -q -w $CFG $TMP_FILE || continue 131 PREV_VAL=$(grep -w $CFG $TMP_FILE) 132 NEW_VAL=$(grep -w $CFG $MERGE_FILE) 133 if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then 134 echo Value of $CFG is redefined by fragment $MERGE_FILE: 135 echo Previous value: $PREV_VAL 136 echo New value: $NEW_VAL 137 echo 138 elif [ "$WARNREDUN" = "true" ]; then 139 echo Value of $CFG is redundant by fragment $MERGE_FILE: 140 fi 141 sed -i "/$CFG[ =]/d" $TMP_FILE 142 done 143 cat $MERGE_FILE >> $TMP_FILE 144done 145 146if [ "$RUNMAKE" = "false" ]; then 147 cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG" 148 echo "#" 149 echo "# merged configuration written to $KCONFIG_CONFIG (needs make)" 150 echo "#" 151 clean_up 152 exit 153fi 154 155# If we have an output dir, setup the O= argument, otherwise leave 156# it blank, since O=. will create an unnecessary ./source softlink 157OUTPUT_ARG="" 158if [ "$OUTPUT" != "." ] ; then 159 OUTPUT_ARG="O=$OUTPUT" 160fi 161 162 163# Use the merged file as the starting point for: 164# alldefconfig: Fills in any missing symbols with Kconfig default 165# allnoconfig: Fills in any missing symbols with # CONFIG_* is not set 166make KCONFIG_ALLCONFIG=$TMP_FILE $EXTERNAL_ARG $OUTPUT_ARG $ALLTARGET 167 168 169# Check all specified config values took (might have missed-dependency issues) 170for CFG in $(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $TMP_FILE); do 171 172 REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE) 173 ACTUAL_VAL=$(grep -w -e "$CFG" "$KCONFIG_CONFIG") 174 if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then 175 echo "Value requested for $CFG not in final .config" 176 echo "Requested value: $REQUESTED_VAL" 177 echo "Actual value: $ACTUAL_VAL" 178 echo "" 179 fi 180done 181 182clean_up 183