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 23 clean_up() { 24 rm -f $TMP_FILE 25 exit 26 } 27 trap clean_up HUP INT TERM 28 29 usage() { 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 } 37 38 RUNMAKE=true 39 ALLTARGET=alldefconfig 40 WARNREDUN=false 41 OUTPUT=. 42 43 while true; do 44 case $1 in 45 "-n") 46 ALLTARGET=allnoconfig 47 shift 48 continue 49 ;; 50 "-m") 51 RUNMAKE=false 52 shift 53 continue 54 ;; 55 "-h") 56 usage 57 exit 58 ;; 59 "-r") 60 WARNREDUN=true 61 shift 62 continue 63 ;; 64 "-O") 65 if [ -d $2 ];then 66 OUTPUT=$(echo $2 | sed 's/\/*$//') 67 else 68 echo "output directory $2 does not exist" 1>&2 69 exit 1 70 fi 71 shift 2 72 continue 73 ;; 74 *) 75 break 76 ;; 77 esac 78 done 79 80 if [ "$#" -lt 1 ] ; then 81 usage 82 exit 83 fi 84 85 if [ -z "$KCONFIG_CONFIG" ]; then 86 if [ "$OUTPUT" != . ]; then 87 KCONFIG_CONFIG=$(readlink -m -- "$OUTPUT/.config") 88 else 89 KCONFIG_CONFIG=.config 90 fi 91 fi 92 93 INITFILE=$1 94 shift; 95 96 if [ ! -r "$INITFILE" ]; then 97 echo "The base file '$INITFILE' does not exist. Exit." >&2 98 exit 1 99 fi 100 101 MERGE_LIST=$* 102 SED_CONFIG_EXP="s/^\(# \)\{0,1\}\(CONFIG_[a-zA-Z0-9_]*\)[= ].*/\2/p" 103 TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX) 104 105 echo "Using $INITFILE as base" 106 cat $INITFILE > $TMP_FILE 107 108 # Merge files, printing warnings on overridden values 109 for MERGE_FILE in $MERGE_LIST ; do 110 echo "Merging $MERGE_FILE" 111 if [ ! -r "$MERGE_FILE" ]; then 112 echo "The merge file '$MERGE_FILE' does not exist. Exit." >&2 113 exit 1 114 fi 115 CFG_LIST=$(sed -n "$SED_CONFIG_EXP" $MERGE_FILE) 116 117 for CFG in $CFG_LIST ; do 118 grep -q -w $CFG $TMP_FILE || continue 119 PREV_VAL=$(grep -w $CFG $TMP_FILE) 120 NEW_VAL=$(grep -w $CFG $MERGE_FILE) 121 if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then 122 echo Value of $CFG is redefined by fragment $MERGE_FILE: 123 echo Previous value: $PREV_VAL 124 echo New value: $NEW_VAL 125 echo 126 elif [ "$WARNREDUN" = "true" ]; then 127 echo Value of $CFG is redundant by fragment $MERGE_FILE: 128 fi 129 sed -i "/$CFG[ =]/d" $TMP_FILE 130 done 131 cat $MERGE_FILE >> $TMP_FILE 132 done 133 134 if [ "$RUNMAKE" = "false" ]; then 135 cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG" 136 echo "#" 137 echo "# merged configuration written to $KCONFIG_CONFIG (needs make)" 138 echo "#" 139 clean_up 140 exit 141 fi 142 143 # If we have an output dir, setup the O= argument, otherwise leave 144 # it blank, since O=. will create an unnecessary ./source softlink 145 OUTPUT_ARG="" 146 if [ "$OUTPUT" != "." ] ; then 147 OUTPUT_ARG="O=$OUTPUT" 148 fi 149 150 151 # Use the merged file as the starting point for: 152 # alldefconfig: Fills in any missing symbols with Kconfig default 153 # allnoconfig: Fills in any missing symbols with # CONFIG_* is not set 154 make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET 155 156 157 # Check all specified config values took (might have missed-dependency issues) 158 for CFG in $(sed -n "$SED_CONFIG_EXP" $TMP_FILE); do 159 160 REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE) 161 ACTUAL_VAL=$(grep -w -e "$CFG" "$KCONFIG_CONFIG") 162 if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then 163 echo "Value requested for $CFG not in final .config" 164 echo "Requested value: $REQUESTED_VAL" 165 echo "Actual value: $ACTUAL_VAL" 166 echo "" 167 fi 168 done 169 170 clean_up 171