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: $0 [OPTIONS] [CONFIG [...]]"
31 echo " -h display this help text"
32 echo " -m only merge the fragments, do not execute the make command"
33 echo " -n use allnoconfig instead of alldefconfig"
34 echo " -r list redundant entries when merging fragments"
35 echo " -O dir to put generated output files. Consider setting \$KCONFIG_CONFIG instead."
39 ALLTARGET=alldefconfig
66 OUTPUT=$(echo $2 | sed 's/\/*$//')
68 echo "output directory $2 does not exist" 1>&2
80 if [ "$#" -lt 1 ] ; then
85 if [ -z "$KCONFIG_CONFIG" ]; then
86 if [ "$OUTPUT" != . ]; then
87 KCONFIG_CONFIG=$(readlink -m -- "$OUTPUT/.config")
89 KCONFIG_CONFIG=.config
96 if [ ! -r "$INITFILE" ]; then
97 echo "The base file '$INITFILE' does not exist. Exit." >&2
102 SED_CONFIG_EXP="s/^\(# \)\{0,1\}\(CONFIG_[a-zA-Z0-9_]*\)[= ].*/\2/p"
103 TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX)
105 echo "Using $INITFILE as base"
106 cat $INITFILE > $TMP_FILE
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 '$MERGE_FILE' does not exist. Exit." >&2
115 CFG_LIST=$(sed -n "$SED_CONFIG_EXP" $MERGE_FILE)
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: $NEW_VAL
126 elif [ "$WARNREDUN" = "true" ]; then
127 echo Value of $CFG is redundant by fragment $MERGE_FILE:
129 sed -i "/$CFG[ =]/d" $TMP_FILE
131 cat $MERGE_FILE >> $TMP_FILE
134 if [ "$RUNMAKE" = "false" ]; then
135 cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG"
137 echo "# merged configuration written to $KCONFIG_CONFIG (needs make)"
143 # If we have an output dir, setup the O= argument, otherwise leave
144 # it blank, since O=. will create an unnecessary ./source softlink
146 if [ "$OUTPUT" != "." ] ; then
147 OUTPUT_ARG="O=$OUTPUT"
151 # Use the merged file as the starting point for:
152 # alldefconfig: Fills in any missing symbols with Kconfig default
153 # allnoconfig: Fills in any missing symbols with # CONFIG_* is not set
154 make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET
157 # Check all specified config values took (might have missed-dependency issues)
158 for CFG in $(sed -n "$SED_CONFIG_EXP" $TMP_FILE); do
160 REQUESTED_VAL=$(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"