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Date: Mon, 12 Nov 2018 09:37:12 +0100
From: Anders Roxell <anders.roxell@...aro.org>
To: Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc: dvhart@...radead.org, Arnd Bergmann <arnd@...db.de>,
linux-kbuild@...r.kernel.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] scripts/kconfig/merge_config: don't redefine 'y' to 'm'
On Sun, 11 Nov 2018 at 05:43, Masahiro Yamada
<yamada.masahiro@...ionext.com> wrote:
>
> On Fri, Nov 9, 2018 at 4:45 AM Anders Roxell <anders.roxell@...aro.org> wrote:
> >
> > In today's merge_config.sh the order of the config fragment files dictates
> > the output of a config option. With this approach we will get different
> > .config files depending on the order of the config fragment files.
> >
> > So doing something like:
> > $ ./merge/kconfig/merge_config.sh selftest.config drm.config
> >
> > Where selftest.config defines DRM=y and drm.config defines DRM=m, the
> > result will be "DRM=m".
> >
> > Rework to add a switch to get builtin '=y' precedence over modules '=m',
> > this will result in "DRM=y". If we do something like this:
> >
> > $ ./merge/kconfig/merge_config.sh -y selftest.config drm.config
> >
> > Suggested-by: Arnd Bergmann <arnd@...db.de>
> > Signed-off-by: Anders Roxell <anders.roxell@...aro.org>
> > ---
> > scripts/kconfig/merge_config.sh | 34 +++++++++++++++++++++++++++------
> > 1 file changed, 28 insertions(+), 6 deletions(-)
> >
> > diff --git a/scripts/kconfig/merge_config.sh b/scripts/kconfig/merge_config.sh
> > index da66e7742282..fcd18f642fc7 100755
> > --- a/scripts/kconfig/merge_config.sh
> > +++ b/scripts/kconfig/merge_config.sh
> > @@ -22,6 +22,7 @@
> >
> > clean_up() {
> > rm -f $TMP_FILE
> > + rm -f $MERGE_FILE
> > exit
> > }
> > trap clean_up HUP INT TERM
> > @@ -32,6 +33,7 @@ usage() {
> > echo " -m only merge the fragments, do not execute the make command"
> > echo " -n use allnoconfig instead of alldefconfig"
> > echo " -r list redundant entries when merging fragments"
> > + echo " -y make builtin have precedence over modules"
> > echo " -O dir to put generated output files. Consider setting \$KCONFIG_CONFIG instead."
> > echo
> > echo "Used prefix: '$CONFIG_PREFIX'. You can redefine it with \$CONFIG_ environment variable."
> > @@ -40,6 +42,8 @@ usage() {
> > RUNMAKE=true
> > ALLTARGET=alldefconfig
> > WARNREDUN=false
> > +BUILTIN=false
> > +BUILTIN_FLAG=false
>
>
> Could you move the initialization of BUILTIN_FLAG
> into the inner for-loop ?
>
>
>
> > OUTPUT=.
> > CONFIG_PREFIX=${CONFIG_-CONFIG_}
> >
> > @@ -64,6 +68,11 @@ while true; do
> > shift
> > continue
> > ;;
> > + "-y")
> > + BUILTIN=true
> > + shift
> > + continue
> > + ;;
> > "-O")
> > if [ -d $2 ];then
> > OUTPUT=$(echo $2 | sed 's/\/*$//')
> > @@ -105,13 +114,15 @@ MERGE_LIST=$*
> > SED_CONFIG_EXP="s/^\(# \)\{0,1\}\(${CONFIG_PREFIX}[a-zA-Z0-9_]*\)[= ].*/\2/p"
> >
> > TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX)
> > +MERGE_FILE=$(mktemp ./.merge_tmp.config.XXXXXXXXXX)
> >
> > echo "Using $INITFILE as base"
> > cat $INITFILE > $TMP_FILE
> >
> > # Merge files, printing warnings on overridden values
> > -for MERGE_FILE in $MERGE_LIST ; do
> > - echo "Merging $MERGE_FILE"
> > +for ORIG_MERGE_FILE in $MERGE_LIST ; do
> > + cat $ORIG_MERGE_FILE > $MERGE_FILE
>
>
> This 'cat' should be moved after the check
> of the presence of '$ORIG_MERGE_FILE'.
>
>
> > + echo "Merging $ORIG_MERGE_FILE"
> > if [ ! -r "$MERGE_FILE" ]; then
>
> This check always returns false now.
>
>
> > echo "The merge file '$MERGE_FILE' does not exist. Exit." >&2
> > exit 1
> > @@ -122,15 +133,26 @@ for MERGE_FILE in $MERGE_LIST ; do
> > grep -q -w $CFG $TMP_FILE || continue
> > PREV_VAL=$(grep -w $CFG $TMP_FILE)
> > NEW_VAL=$(grep -w $CFG $MERGE_FILE)
>
> Could you add 'BUILTIN_FLAG=false' here?
>
>
>
> > - if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then
> > - echo Value of $CFG is redefined by fragment $MERGE_FILE:
> > + if [ "$BUILTIN" = "true" ] && [ "${NEW_VAL#CONFIG_*=}" = "m" ] && [ "${PREV_VAL#CONFIG_*=}" = "y" ]; then
> > + echo Previous value: $PREV_VAL
> > + echo New value: $NEW_VAL
> > + echo -y passed, will not demote y to m
> > + echo
> > + BUILTIN_FLAG=true
> > + elif [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then
> > + echo Value of $CFG is redefined by fragment $ORIG_MERGE_FILE:
> > echo Previous value: $PREV_VAL
> > echo New value: $NEW_VAL
> > echo
> > elif [ "$WARNREDUN" = "true" ]; then
> > - echo Value of $CFG is redundant by fragment $MERGE_FILE:
> > + echo Value of $CFG is redundant by fragment $ORIG_MERGE_FILE:
> > + fi
> > + if [ "$BUILTIN_FLAG" = "false" ]; then
> > + sed -i "/$CFG[ =]/d" $TMP_FILE
> > + else
> > + sed -i "/$CFG[ =]/d" $MERGE_FILE
> > + BUILTIN_FLAG=false
>
>
> Then this 'BUILTIN_FLAG=false' can go away.
Thank you Masahiro, will send out an update shortly where I address
all your comments.
Cheers,
Anders
>
> Thanks.
>
>
> > fi
> > - sed -i "/$CFG[ =]/d" $TMP_FILE
> > done
> > cat $MERGE_FILE >> $TMP_FILE
> > done
> > --
> > 2.19.1
> >
>
>
> --
> Best Regards
> Masahiro Yamada
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