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_EXP1="s/^\(${CONFIG_PREFIX}[a-zA-Z0-9_]*\)=.*/\1/p" 106SED_CONFIG_EXP2="s/^# \(${CONFIG_PREFIX}[a-zA-Z0-9_]*\) is not set$/\1/p" 107 108TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX) 109 110echo "Using $INITFILE as base" 111cat $INITFILE > $TMP_FILE 112 113# Merge files, printing warnings on overridden values 114for MERGE_FILE in $MERGE_LIST ; do 115 echo "Merging $MERGE_FILE" 116 if [ ! -r "$MERGE_FILE" ]; then 117 echo "The merge file '$MERGE_FILE' does not exist. Exit." >&2 118 exit 1 119 fi 120 CFG_LIST=$(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $MERGE_FILE) 121 122 for CFG in $CFG_LIST ; do 123 grep -q -w $CFG $TMP_FILE || continue 124 PREV_VAL=$(grep -w $CFG $TMP_FILE) 125 NEW_VAL=$(grep -w $CFG $MERGE_FILE) 126 if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then 127 echo Value of $CFG is redefined by fragment $MERGE_FILE: 128 echo Previous value: $PREV_VAL 129 echo New value: $NEW_VAL 130 echo 131 elif [ "$WARNREDUN" = "true" ]; then 132 echo Value of $CFG is redundant by fragment $MERGE_FILE: 133 fi 134 sed -i "/$CFG[ =]/d" $TMP_FILE 135 done 136 cat $MERGE_FILE >> $TMP_FILE 137done 138 139if [ "$RUNMAKE" = "false" ]; then 140 cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG" 141 echo "#" 142 echo "# merged configuration written to $KCONFIG_CONFIG (needs make)" 143 echo "#" 144 clean_up 145 exit 146fi 147 148# If we have an output dir, setup the O= argument, otherwise leave 149# it blank, since O=. will create an unnecessary ./source softlink 150OUTPUT_ARG="" 151if [ "$OUTPUT" != "." ] ; then 152 OUTPUT_ARG="O=$OUTPUT" 153fi 154 155 156# Use the merged file as the starting point for: 157# alldefconfig: Fills in any missing symbols with Kconfig default 158# allnoconfig: Fills in any missing symbols with # CONFIG_* is not set 159make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET 160 161 162# Check all specified config values took (might have missed-dependency issues) 163for CFG in $(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $TMP_FILE); do 164 165 REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE) 166 ACTUAL_VAL=$(grep -w -e "$CFG" "$KCONFIG_CONFIG") 167 if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then 168 echo "Value requested for $CFG not in final .config" 169 echo "Requested value: $REQUESTED_VAL" 170 echo "Actual value: $ACTUAL_VAL" 171 echo "" 172 fi 173done 174 175clean_up 176