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To avoid having to look manually for used but undefined Kconfig variables, I've written a script which tries do this efficiently, in case all other attention fail. It accounts for _MODULE suffix and for UML_ prefixes to Kconfig variable, but otherwise looks for exact matches (i.e. \<CONFIG_; this is done to exclude macros like MMCONFIG_). Undefined Kconfig variables should be not be removed without care, but for instance arch/i386/boot/ uses a bunch of undefined Kconfig vars: $ scripts/checkunknowndefines.sh arch/i386/boot/ arch/i386/boot/video.h uses undefined symbol VIDEO_400_HACK arch/i386/boot/video-vga.c uses undefined symbol VIDEO_400_HACK arch/i386/boot/video.c uses undefined symbol VIDEO_RETAIN arch/i386/boot/video.h uses undefined symbol VIDEO_RETAIN arch/i386/boot/video.h uses undefined symbol VIDEO_SVGA arch/i386/boot/video.h uses undefined symbol VIDEO_VESA arch/i386/boot/video-vesa.c uses undefined symbol VIDEO_VESA It should also be mentioned in SubmittingPatches and SubmitChecklist. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
59 lines
1.8 KiB
Bash
Executable file
59 lines
1.8 KiB
Bash
Executable file
#!/bin/sh
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# Find Kconfig variables used in source code but never defined in Kconfig
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# Copyright (C) 2007, Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
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# Tested with dash.
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paths="$@"
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[ -z "$paths" ] && paths=.
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# Doing this once at the beginning saves a lot of time, on a cache-hot tree.
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Kconfigs="`find . -name 'Kconfig' -o -name 'Kconfig*[^~]'`"
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echo -e "File list \tundefined symbol used"
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find $paths -name '*.[chS]' -o -name 'Makefile' -o -name 'Makefile*[^~]'| while read i
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do
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# Output the bare Kconfig variable and the filename; the _MODULE part at
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# the end is not removed here (would need perl an not-hungry regexp for that).
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sed -ne 's!^.*\<\(UML_\)\?CONFIG_\([0-9A-Z_]\+\).*!\2 '$i'!p' < $i
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done | \
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# Smart "sort|uniq" implemented in awk and tuned to collect the names of all
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# files which use a given symbol
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awk '{map[$1, count[$1]++] = $2; }
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END {
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for (combIdx in map) {
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split(combIdx, separate, SUBSEP);
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# The value may have been removed.
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if (! ( (separate[1], separate[2]) in map ) )
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continue;
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symb=separate[1];
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printf "%s ", symb;
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#Use gawk extension to delete the names vector
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delete names;
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#Portably delete the names vector
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#split("", names);
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for (i=0; i < count[symb]; i++) {
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names[map[symb, i]] = 1;
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# Unfortunately, we may still encounter symb, i in the
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# outside iteration.
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delete map[symb, i];
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}
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i=0;
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for (name in names) {
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if (i > 0)
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printf ", %s", name;
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else
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printf "%s", name;
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i++;
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}
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printf "\n";
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}
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}' |
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while read symb files; do
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# Remove the _MODULE suffix when checking the variable name. This should
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# be done only on tristate symbols, actually, but Kconfig parsing is
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# beyond the purpose of this script.
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symb_bare=`echo $symb | sed -e 's/_MODULE//'`
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if ! grep -q "\<$symb_bare\>" $Kconfigs; then
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echo -e "$files: \t$symb"
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fi
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done|sort
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