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: $0 [OPTIONS] [CONFIG [...]]" 31 echo " -h display this help text" 32 echo " -m only merge the fragments, do not execute the make command" 33 echo " -n use allnoconfig instead of alldefconfig" 34 echo " -r list redundant entries when merging fragments" 35 echo " -O dir to put generated output files. Consider setting \$KCONFIG_CONFIG instead." 36 echo 37 echo "Used prefix: '$CONFIG_PREFIX'. You can redefine it with \$CONFIG_ environment variable." 38} 39 40RUNMAKE=true 41ALLTARGET=alldefconfig 42WARNREDUN=false 43OUTPUT=. 44CONFIG_PREFIX=${CONFIG_-CONFIG_} 45 46while true; do 47 case $1 in 48 "-n") 49 ALLTARGET=allnoconfig 50 shift 51 continue 52 ;; 53 "-m") 54 RUNMAKE=false 55 shift 56 continue 57 ;; 58 "-h") 59 usage 60 exit 61 ;; 62 "-r") 63 WARNREDUN=true 64 shift 65 continue 66 ;; 67 "-O") 68 if [ -d $2 ];then 69 OUTPUT=$(echo $2 | sed 's/\/*$//') 70 else 71 echo "output directory $2 does not exist" 1>&2 72 exit 1 73 fi 74 shift 2 75 continue 76 ;; 77 *) 78 break 79 ;; 80 esac 81done 82 83if [ "$#" -lt 1 ] ; then 84 usage 85 exit 86fi 87 88if [ -z "$KCONFIG_CONFIG" ]; then 89 if [ "$OUTPUT" != . ]; then 90 KCONFIG_CONFIG=$(readlink -m -- "$OUTPUT/.config") 91 else 92 KCONFIG_CONFIG=.config 93 fi 94fi 95 96INITFILE=$1 97shift; 98 99if [ ! -r "$INITFILE" ]; then 100 echo "The base file '$INITFILE' does not exist. Exit." >&2 101 exit 1 102fi 103 104MERGE_LIST=$* 105SED_CONFIG_EXP="s/^\(# \)\{0,1\}\(${CONFIG_PREFIX}[a-zA-Z0-9_]*\)[= ].*/\2/p" 106 107TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX) 108 109echo "Using $INITFILE as base" 110cat $INITFILE > $TMP_FILE 111 112# Merge files, printing warnings on overridden values 113for MERGE_FILE in $MERGE_LIST ; do 114 echo "Merging $MERGE_FILE" 115 if [ ! -r "$MERGE_FILE" ]; then 116 echo "The merge file '$MERGE_FILE' does not exist. Exit." >&2 117 exit 1 118 fi 119 CFG_LIST=$(sed -n "$SED_CONFIG_EXP" $MERGE_FILE) 120 121 for CFG in $CFG_LIST ; do 122 grep -q -w $CFG $TMP_FILE || continue 123 PREV_VAL=$(grep -w $CFG $TMP_FILE) 124 NEW_VAL=$(grep -w $CFG $MERGE_FILE) 125 if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then 126 echo Value of $CFG is redefined by fragment $MERGE_FILE: 127 echo Previous value: $PREV_VAL 128 echo New value: $NEW_VAL 129 echo 130 elif [ "$WARNREDUN" = "true" ]; then 131 echo Value of $CFG is redundant by fragment $MERGE_FILE: 132 fi 133 sed -i "/$CFG[ =]/d" $TMP_FILE 134 done 135 cat $MERGE_FILE >> $TMP_FILE 136done 137 138if [ "$RUNMAKE" = "false" ]; then 139 cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG" 140 echo "#" 141 echo "# merged configuration written to $KCONFIG_CONFIG (needs make)" 142 echo "#" 143 clean_up 144 exit 145fi 146 147# If we have an output dir, setup the O= argument, otherwise leave 148# it blank, since O=. will create an unnecessary ./source softlink 149OUTPUT_ARG="" 150if [ "$OUTPUT" != "." ] ; then 151 OUTPUT_ARG="O=$OUTPUT" 152fi 153 154 155# Use the merged file as the starting point for: 156# alldefconfig: Fills in any missing symbols with Kconfig default 157# allnoconfig: Fills in any missing symbols with # CONFIG_* is not set 158make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET 159 160 161# Check all specified config values took (might have missed-dependency issues) 162for CFG in $(sed -n "$SED_CONFIG_EXP" $TMP_FILE); do 163 164 REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE) 165 ACTUAL_VAL=$(grep -w -e "$CFG" "$KCONFIG_CONFIG") 166 if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then 167 echo "Value requested for $CFG not in final .config" 168 echo "Requested value: $REQUESTED_VAL" 169 echo "Actual value: $ACTUAL_VAL" 170 echo "" 171 fi 172done 173 174clean_up 175