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).
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
11 # Copyright (c) 2009-2010 Wind River Systems, Inc.
12 # Copyright 2011 Linaro
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.
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.
27 trap clean_up HUP INT TERM
30 echo "Usage: $0 [OPTIONS] [CONFIG [...]]"
31 echo " -h display this help text"
32 echo " -m only merge the fragments, do not execute the make command"
33 echo " -n use allnoconfig instead of alldefconfig"
34 echo " -r list redundant entries when merging fragments"
35 echo " -O dir to put generated output files. Consider setting \$KCONFIG_CONFIG instead."
37 echo "Used prefix: '$CONFIG_PREFIX'. You can redefine it with \$CONFIG_ environment variable."
41 ALLTARGET=alldefconfig
44 CONFIG_PREFIX=${CONFIG_-CONFIG_}
69 OUTPUT=$(echo $2 | sed 's/\/*$//')
71 echo "output directory $2 does not exist" 1>&2
83 if [ "$#" -lt 1 ] ; then
88 if [ -z "$KCONFIG_CONFIG" ]; then
89 if [ "$OUTPUT" != . ]; then
90 KCONFIG_CONFIG=$(readlink -m -- "$OUTPUT/.config")
92 KCONFIG_CONFIG=.config
99 if [ ! -r "$INITFILE" ]; then
100 echo "The base file '$INITFILE' does not exist. Exit." >&2
105 SED_CONFIG_EXP1="s/^\(${CONFIG_PREFIX}[a-zA-Z0-9_]*\)=.*/\1/p"
106 SED_CONFIG_EXP2="s/^# \(${CONFIG_PREFIX}[a-zA-Z0-9_]*\) is not set$/\1/p"
108 TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX)
110 echo "Using $INITFILE as base"
111 cat $INITFILE > $TMP_FILE
113 # Merge files, printing warnings on overridden values
114 for MERGE_FILE in $MERGE_LIST ; do
115 echo "Merging $MERGE_FILE"
116 if [ ! -r "$MERGE_FILE" ]; then
117 echo "The merge file '$MERGE_FILE' does not exist. Exit." >&2
120 CFG_LIST=$(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $MERGE_FILE)
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: $NEW_VAL
131 elif [ "$WARNREDUN" = "true" ]; then
132 echo Value of $CFG is redundant by fragment $MERGE_FILE:
134 sed -i "/$CFG[ =]/d" $TMP_FILE
136 cat $MERGE_FILE >> $TMP_FILE
139 if [ "$RUNMAKE" = "false" ]; then
140 cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG"
142 echo "# merged configuration written to $KCONFIG_CONFIG (needs make)"
148 # If we have an output dir, setup the O= argument, otherwise leave
149 # it blank, since O=. will create an unnecessary ./source softlink
151 if [ "$OUTPUT" != "." ] ; then
152 OUTPUT_ARG="O=$OUTPUT"
156 # Use the merged file as the starting point for:
157 # alldefconfig: Fills in any missing symbols with Kconfig default
158 # allnoconfig: Fills in any missing symbols with # CONFIG_* is not set
159 make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET
162 # Check all specified config values took (might have missed-dependency issues)
163 for CFG in $(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $TMP_FILE); do
165 REQUESTED_VAL=$(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"