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Diffstat (limited to 'recipes-kernel/linux/files/merge_config.sh')
-rwxr-xr-x | recipes-kernel/linux/files/merge_config.sh | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/recipes-kernel/linux/files/merge_config.sh b/recipes-kernel/linux/files/merge_config.sh new file mode 100755 index 0000000..33f18d4 --- /dev/null +++ b/recipes-kernel/linux/files/merge_config.sh | |||
@@ -0,0 +1,142 @@ | |||
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 | |||
24 | usage() { | ||
25 | echo "Usage: $0 [OPTIONS] [CONFIG [...]]" | ||
26 | echo " -h display this help text" | ||
27 | echo " -m only merge the fragments, do not execute the make command" | ||
28 | echo " -n use allnoconfig instead of alldefconfig" | ||
29 | echo " -x use allmodconfig instead of alldefconfig" | ||
30 | echo " -d debug. Don't cleanup temporary files" | ||
31 | } | ||
32 | |||
33 | MAKE_FLAG=true | ||
34 | ALLTARGET=alldefconfig | ||
35 | |||
36 | # There are two variables that impact where the .config will be dropped, | ||
37 | # O= and KBUILD_OUTPUT=. So we'll respect those variables and use them as | ||
38 | # an output directory as well. These two variables are not propagating | ||
39 | # automatically to the kernel build, so always explicitly setting O= | ||
40 | # and passing it to the kernel build ensures that it is respected. | ||
41 | if [ -n "$KBUILD_OUTPUT" ]; then | ||
42 | O=$KBUILD_OUTPUT | ||
43 | fi | ||
44 | if [ -z "$O" ]; then | ||
45 | O=. | ||
46 | fi | ||
47 | |||
48 | while true; do | ||
49 | case $1 in | ||
50 | "-n") | ||
51 | ALLTARGET=allnoconfig | ||
52 | shift | ||
53 | continue | ||
54 | ;; | ||
55 | "-m") | ||
56 | MAKE_FLAG=false | ||
57 | shift | ||
58 | continue | ||
59 | ;; | ||
60 | "-d") | ||
61 | DEBUG=true | ||
62 | shift | ||
63 | continue | ||
64 | ;; | ||
65 | "-h") | ||
66 | usage | ||
67 | exit | ||
68 | ;; | ||
69 | *) | ||
70 | break | ||
71 | ;; | ||
72 | esac | ||
73 | done | ||
74 | |||
75 | clean_up() { | ||
76 | rm -f $TMP_FILE | ||
77 | exit | ||
78 | } | ||
79 | if [ -z "$DEBUG" ]; then | ||
80 | trap clean_up SIGHUP SIGINT SIGTERM | ||
81 | fi | ||
82 | |||
83 | |||
84 | MERGE_LIST=$* | ||
85 | SED_CONFIG_EXP="s/^\(# \)\{0,1\}\(CONFIG_[a-zA-Z0-9_]*\)[= ].*/\2/p" | ||
86 | TMP_FILE=$(mktemp $O/.tmp.config.XXXXXXXXXX) | ||
87 | |||
88 | # Merge files, printing warnings on overrided values | ||
89 | for MERGE_FILE in $MERGE_LIST ; do | ||
90 | echo "Merging $MERGE_FILE" | ||
91 | CFG_LIST=$(sed -n "$SED_CONFIG_EXP" $MERGE_FILE) | ||
92 | |||
93 | for CFG in $CFG_LIST ; do | ||
94 | grep -q -w $CFG $TMP_FILE | ||
95 | if [ $? -eq 0 ] ; then | ||
96 | PREV_VAL=$(grep -w $CFG $TMP_FILE) | ||
97 | NEW_VAL=$(grep -w $CFG $MERGE_FILE) | ||
98 | if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then | ||
99 | echo Value of $CFG is redefined by fragment $MERGE_FILE: | ||
100 | echo Previous value: $PREV_VAL | ||
101 | echo New value: $NEW_VAL | ||
102 | echo | ||
103 | fi | ||
104 | sed -i "/$CFG[ =]/d" $TMP_FILE | ||
105 | fi | ||
106 | done | ||
107 | cat $MERGE_FILE >> $TMP_FILE | ||
108 | done | ||
109 | |||
110 | if [ "$MAKE_FLAG" = "false" ]; then | ||
111 | cp $TMP_FILE $O/.config | ||
112 | echo "#" | ||
113 | echo "# merged configuration written to $O/.config (needs make)" | ||
114 | echo "#" | ||
115 | if [ -z "$DEBUG" ]; then | ||
116 | clean_up | ||
117 | fi | ||
118 | exit | ||
119 | fi | ||
120 | |||
121 | # Use the merged file as the starting point for: | ||
122 | # alldefconfig: Fills in any missing symbols with Kconfig default | ||
123 | # allnoconfig: Fills in any missing symbols with # CONFIG_* is not set | ||
124 | make KCONFIG_ALLCONFIG=$TMP_FILE O=$O $ALLTARGET | ||
125 | |||
126 | |||
127 | # Check all specified config values took (might have missed-dependency issues) | ||
128 | for CFG in $(sed -n "$SED_CONFIG_EXP" $TMP_FILE); do | ||
129 | |||
130 | REQUESTED_VAL=$(sed -n "$SED_CONFIG_EXP" $TMP_FILE | grep -w -e "$CFG") | ||
131 | ACTUAL_VAL=$(sed -n "$SED_CONFIG_EXP" $O/.config | grep -w -e "$CFG") | ||
132 | if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then | ||
133 | echo "Value requested for $CFG not in final .config" | ||
134 | echo "Requested value: $REQUESTED_VAL" | ||
135 | echo "Actual value: $ACTUAL_VAL" | ||
136 | echo "" | ||
137 | fi | ||
138 | done | ||
139 | |||
140 | if [ -z "$DEBUG" ]; then | ||
141 | clean_up | ||
142 | fi | ||