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Paolo 'Blaisorblade' Giarrusso0bce6732007-08-25 09:45:28 +02001#!/bin/sh
2# Find Kconfig variables used in source code but never defined in Kconfig
3# Copyright (C) 2007, Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
4
5# Tested with dash.
6paths="$@"
7[ -z "$paths" ] && paths=.
8
9# Doing this once at the beginning saves a lot of time, on a cache-hot tree.
10Kconfigs="`find . -name 'Kconfig' -o -name 'Kconfig*[^~]'`"
11
Max Filippov36b54012013-08-23 00:25:24 +040012printf "File list \tundefined symbol used\n"
Paolo 'Blaisorblade' Giarrusso0bce6732007-08-25 09:45:28 +020013find $paths -name '*.[chS]' -o -name 'Makefile' -o -name 'Makefile*[^~]'| while read i
14do
15 # Output the bare Kconfig variable and the filename; the _MODULE part at
16 # the end is not removed here (would need perl an not-hungry regexp for that).
Roland Dreier03b550d2010-06-02 13:56:36 -070017 sed -ne 's!^.*\<\(UML_\)\?CONFIG_\([0-9A-Za-z_]\+\).*!\2 '$i'!p' < $i
Paolo 'Blaisorblade' Giarrusso0bce6732007-08-25 09:45:28 +020018done | \
19# Smart "sort|uniq" implemented in awk and tuned to collect the names of all
20# files which use a given symbol
21awk '{map[$1, count[$1]++] = $2; }
22END {
23 for (combIdx in map) {
24 split(combIdx, separate, SUBSEP);
25 # The value may have been removed.
26 if (! ( (separate[1], separate[2]) in map ) )
27 continue;
28 symb=separate[1];
29 printf "%s ", symb;
30 #Use gawk extension to delete the names vector
31 delete names;
32 #Portably delete the names vector
33 #split("", names);
34 for (i=0; i < count[symb]; i++) {
35 names[map[symb, i]] = 1;
36 # Unfortunately, we may still encounter symb, i in the
37 # outside iteration.
38 delete map[symb, i];
39 }
40 i=0;
41 for (name in names) {
42 if (i > 0)
43 printf ", %s", name;
44 else
45 printf "%s", name;
46 i++;
47 }
48 printf "\n";
49 }
50}' |
51while read symb files; do
52 # Remove the _MODULE suffix when checking the variable name. This should
53 # be done only on tristate symbols, actually, but Kconfig parsing is
54 # beyond the purpose of this script.
55 symb_bare=`echo $symb | sed -e 's/_MODULE//'`
56 if ! grep -q "\<$symb_bare\>" $Kconfigs; then
Max Filippov36b54012013-08-23 00:25:24 +040057 printf "$files: \t$symb\n"
Paolo 'Blaisorblade' Giarrusso0bce6732007-08-25 09:45:28 +020058 fi
59done|sort