# HG changeset patch # User Rob Landley # Date 1449694830 21600 # Node ID 2dd2e648c2ae12962f2f3ce81a3c765edc2b230c # Parent 893e70efe0473c1f90c04f29ef64a714505109b3 Move sources/toys/miniconfig.sh to more/miniconfig.sh diff -r 893e70efe047 -r 2dd2e648c2ae more/miniconfig.sh --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/more/miniconfig.sh Wed Dec 09 15:00:30 2015 -0600 @@ -0,0 +1,110 @@ +#!/bin/bash + +# miniconfig.sh copyright 2005 by Rob Landley +# Licensed under the GNU General Public License version 2. + +# Run this in the linux kernel build directory with a starting file, and +# it creates a file called mini.config with all the redundant lines of that +# .config removed. The starting file must match what the kernel outputs. +# If it doesn't, then run "make oldconfig" on it to get one that does. + +# A miniconfig file is essentially the list of symbols you'd have to switch +# on if you started from "allnoconfig" and then went through menuconfig +# selecting what you wanted. It's just the list of symbols you're interested +# in, without including the ones set automatically by dependency checking. + +# To use a miniconfig: make allnoconfig KCONFIG_ALLCONFIG=/path/to/mini.conf + +# Miniconfig is more easily human-readable than a full .config file, and in +# some ways more version-independent than full .config files. On the other +# hand, when you update to a new kernel it won't get default values for newly +# created symbols (they'll be off if they didn't exist before and thus weren't +# in your "I need this and this and this" checklist), which can cause problems. + +# See sources/more/migrate_kernel.sh for a script that expands a miniconfig +# to a .config under an old kernel version, copies it to a new version, +# runs "make oldconfig" to update it, creates a new mini.config from the +# result, and then shows a diff so you can see whether you want the new symbols. + +export KCONFIG_NOTIMESTAMP=1 + +if [ $# -ne 1 ] +then + echo "Usage: miniconfig.sh configfile" + exit 1 +fi + +if [ ! -f "$1" ] +then + echo "Couldn't find "'"'"$1"'"' + exit 1 +fi + +if [ "$1" == ".config" ] +then + echo "It overwrites .config, rename it and try again." + exit 1 +fi + +make allnoconfig KCONFIG_ALLCONFIG="$1" > /dev/null +# Shouldn't need this, but kconfig goes "boing" at times... +yes "" | make oldconfig > /dev/null +if ! cmp .config "$1" +then + echo Sanity test failed, normalizing starting configuration... + diff -u "$1" .config +fi +cp .config .big.config + +# Speed heuristic: remove all blank/comment lines +grep -v '^[#$]' .config | grep -v '^$' > mini.config +# This should never fail, but kconfig is so broken it does sometimes. +make allnoconfig KCONFIG_ALLCONFIG=mini.config > /dev/null +if ! cmp .config "$1" +then + echo Insanity test failed: reversing blank line removal heuristic. + cp .big.config mini.config +fi +#cp .config mini.config + +echo "Calculating mini.config..." + +LENGTH=`cat mini.config | wc -l` +OLDLENGTH=$LENGTH + +# Loop through all lines in the file +I=1 +while true +do + [ $I -gt $LENGTH ] && break + sed -n "$I,$(($I+${STRIDE:-1}-1))!p" mini.config > .config.test + # Do a config with this file + rm .config + make allnoconfig KCONFIG_ALLCONFIG=.config.test 2>/dev/null | head -n 1000000 > /dev/null + # Compare. Because we normalized at the start, the files should be identical. + if cmp -s .config .big.config + then + # Found unneeded line(s) + mv .config.test mini.config + LENGTH=$(($LENGTH-${STRIDE:-1})) + # Cosmetic: if stride tests off the end don't show total length less + # than number of entries found. + [ $I -gt $LENGTH ] && LENGTH=$(($I-1)) + # Special case where we know the next line _is_ needed: stride 2 failed + # but we discarded the first line + [ -z "$STRIDE" ] && [ ${OLDSTRIDE:-1} -eq 2 ] && I=$(($I+1)) + STRIDE=$(($STRIDE+1)) + OLDSTRIDE=$STRIDE + else + # That hunk was needed + if [ ${STRIDE:-1} -le 1 ] + then + I=$(($I+1)) + OLDSTRIDE= + fi + STRIDE= + fi + echo -n -e "\r[${STRIDE:-1}] $[$I-1]/$LENGTH lines $(cat mini.config | wc -c) bytes $[100-((($LENGTH-$I)*100)/$OLDLENGTH)]% " +done +rm .big.config +echo diff -r 893e70efe047 -r 2dd2e648c2ae sources/toys/miniconfig.sh --- a/sources/toys/miniconfig.sh Mon Dec 07 12:52:55 2015 -0600 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,110 +0,0 @@ -#!/bin/bash - -# miniconfig.sh copyright 2005 by Rob Landley -# Licensed under the GNU General Public License version 2. - -# Run this in the linux kernel build directory with a starting file, and -# it creates a file called mini.config with all the redundant lines of that -# .config removed. The starting file must match what the kernel outputs. -# If it doesn't, then run "make oldconfig" on it to get one that does. - -# A miniconfig file is essentially the list of symbols you'd have to switch -# on if you started from "allnoconfig" and then went through menuconfig -# selecting what you wanted. It's just the list of symbols you're interested -# in, without including the ones set automatically by dependency checking. - -# To use a miniconfig: make allnoconfig KCONFIG_ALLCONFIG=/path/to/mini.conf - -# Miniconfig is more easily human-readable than a full .config file, and in -# some ways more version-independent than full .config files. On the other -# hand, when you update to a new kernel it won't get default values for newly -# created symbols (they'll be off if they didn't exist before and thus weren't -# in your "I need this and this and this" checklist), which can cause problems. - -# See sources/more/migrate_kernel.sh for a script that expands a miniconfig -# to a .config under an old kernel version, copies it to a new version, -# runs "make oldconfig" to update it, creates a new mini.config from the -# result, and then shows a diff so you can see whether you want the new symbols. - -export KCONFIG_NOTIMESTAMP=1 - -if [ $# -ne 1 ] -then - echo "Usage: miniconfig.sh configfile" - exit 1 -fi - -if [ ! -f "$1" ] -then - echo "Couldn't find "'"'"$1"'"' - exit 1 -fi - -if [ "$1" == ".config" ] -then - echo "It overwrites .config, rename it and try again." - exit 1 -fi - -make allnoconfig KCONFIG_ALLCONFIG="$1" > /dev/null -# Shouldn't need this, but kconfig goes "boing" at times... -yes "" | make oldconfig > /dev/null -if ! cmp .config "$1" -then - echo Sanity test failed, normalizing starting configuration... - diff -u "$1" .config -fi -cp .config .big.config - -# Speed heuristic: remove all blank/comment lines -grep -v '^[#$]' .config | grep -v '^$' > mini.config -# This should never fail, but kconfig is so broken it does sometimes. -make allnoconfig KCONFIG_ALLCONFIG=mini.config > /dev/null -if ! cmp .config "$1" -then - echo Insanity test failed: reversing blank line removal heuristic. - cp .big.config mini.config -fi -#cp .config mini.config - -echo "Calculating mini.config..." - -LENGTH=`cat mini.config | wc -l` -OLDLENGTH=$LENGTH - -# Loop through all lines in the file -I=1 -while true -do - [ $I -gt $LENGTH ] && break - sed -n "$I,$(($I+${STRIDE:-1}-1))!p" mini.config > .config.test - # Do a config with this file - rm .config - make allnoconfig KCONFIG_ALLCONFIG=.config.test 2>/dev/null | head -n 1000000 > /dev/null - # Compare. Because we normalized at the start, the files should be identical. - if cmp -s .config .big.config - then - # Found unneeded line(s) - mv .config.test mini.config - LENGTH=$(($LENGTH-${STRIDE:-1})) - # Cosmetic: if stride tests off the end don't show total length less - # than number of entries found. - [ $I -gt $LENGTH ] && LENGTH=$(($I-1)) - # Special case where we know the next line _is_ needed: stride 2 failed - # but we discarded the first line - [ -z "$STRIDE" ] && [ ${OLDSTRIDE:-1} -eq 2 ] && I=$(($I+1)) - STRIDE=$(($STRIDE+1)) - OLDSTRIDE=$STRIDE - else - # That hunk was needed - if [ ${STRIDE:-1} -le 1 ] - then - I=$(($I+1)) - OLDSTRIDE= - fi - STRIDE= - fi - echo -n -e "\r[${STRIDE:-1}] $[$I-1]/$LENGTH lines $(cat mini.config | wc -c) bytes $[100-((($LENGTH-$I)*100)/$OLDLENGTH)]% " -done -rm .big.config -echo diff -r 893e70efe047 -r 2dd2e648c2ae www/FAQ.html --- a/www/FAQ.html Mon Dec 07 12:52:55 2015 -0600 +++ b/www/FAQ.html Wed Dec 09 15:00:30 2015 -0600 @@ -553,8 +553,8 @@ 
make allnoconfig KCONFIG_ALLCONFIG=filename
-

The sources/toys/miniconfig.sh script compresses a full .config into -a miniconfig. To use, "cp .config tempname; ARCH=x86 $PATHTO/miniconfig.sh +

The more/miniconfig.sh script compresses a full .config into +a miniconfig. To use, "cp .config tempname; ARCH=x86 $PATHTO/more/miniconfig.sh tempname" and the result winds up in mini.conf.

The kernel's new defconfig format is similarly filtered to remove