linux-kernel - Re: [PATCH 1/2] bootconfig: Support O=<builddir> option

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Message-ID: <27ae25f5-29c6-62f3-5531-78fcc28b7d3c@infradead.org>
Date:   Wed, 4 Mar 2020 15:04:43 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Masami Hiramatsu <mhiramat@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>
Cc:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Borislav Petkov <bp@...en8.de>,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH 1/2] bootconfig: Support O=<builddir> option

On 3/3/20 3:24 AM, Masami Hiramatsu wrote:
> Support O=<builddir> option to build bootconfig tool in
> the other directory. As same as other tools, if you specify
> O=<builddir>, bootconfig command is build under <builddir>.

Hm.  If I use
$ make O=~/tmp -C tools/bootconfig

that works: it builds bootconfig in ~/tmp.

OTOH, if I sit at the top of the kernel source tree
and I enter
$ mkdir builddir
$ make O=builddir -C tools/bootconfig

I get this:
make: Entering directory '/home/rdunlap/lnx/next/linux-next-20200304/tools/bootconfig'
../scripts/Makefile.include:4: *** O=builddir does not exist.  Stop.
make: Leaving directory '/home/rdunlap/lnx/next/linux-next-20200304/tools/bootconfig'

so it looks like tools/scripts/Makefile.include doesn't handle this case correctly
(which is how I do all of my builds).


> Reported-by: Randy Dunlap <rdunlap@...radead.org>
> Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
> ---
>  tools/bootconfig/Makefile           |   27 +++++++++++++++++----------
>  tools/bootconfig/test-bootconfig.sh |   14 ++++++++++----
>  2 files changed, 27 insertions(+), 14 deletions(-)
> 
> diff --git a/tools/bootconfig/Makefile b/tools/bootconfig/Makefile
> index a6146ac64458..da5975775337 100644
> --- a/tools/bootconfig/Makefile
> +++ b/tools/bootconfig/Makefile
> @@ -1,23 +1,30 @@
>  # SPDX-License-Identifier: GPL-2.0
>  # Makefile for bootconfig command
> +include ../scripts/Makefile.include
>  
>  bindir ?= /usr/bin
>  
> -HEADER = include/linux/bootconfig.h
> -CFLAGS = -Wall -g -I./include
> +ifeq ($(srctree),)
> +srctree := $(patsubst %/,%,$(dir $(CURDIR)))
> +srctree := $(patsubst %/,%,$(dir $(srctree)))
> +endif
>  
> -PROGS = bootconfig
> +LIBSRC = $(srctree)/lib/bootconfig.c $(srctree)/include/linux/bootconfig.h
> +CFLAGS = -Wall -g -I$(CURDIR)/include
>  
> -all: $(PROGS)
> +ALL_TARGETS := bootconfig
> +ALL_PROGRAMS := $(patsubst %,$(OUTPUT)%,$(ALL_TARGETS))
>  
> -bootconfig: ../../lib/bootconfig.c main.c $(HEADER)
> +all: $(ALL_PROGRAMS)
> +
> +$(OUTPUT)bootconfig: main.c $(LIBSRC)
>  	$(CC) $(filter %.c,$^) $(CFLAGS) -o $@
>  
> -install: $(PROGS)
> -	install bootconfig $(DESTDIR)$(bindir)
> +test: $(ALL_PROGRAMS) test-bootconfig.sh
> +	./test-bootconfig.sh $(OUTPUT)
>  
> -test: bootconfig
> -	./test-bootconfig.sh
> +install: $(ALL_PROGRAMS)
> +	install $(OUTPUT)bootconfig $(DESTDIR)$(bindir)
>  
>  clean:
> -	$(RM) -f *.o bootconfig
> +	$(RM) -f $(OUTPUT)*.o $(ALL_PROGRAMS)
> diff --git a/tools/bootconfig/test-bootconfig.sh b/tools/bootconfig/test-bootconfig.sh
> index 1411f4c3454f..81b350ffd03f 100755
> --- a/tools/bootconfig/test-bootconfig.sh
> +++ b/tools/bootconfig/test-bootconfig.sh
> @@ -3,9 +3,16 @@
>  
>  echo "Boot config test script"
>  
> -BOOTCONF=./bootconfig
> -INITRD=`mktemp initrd-XXXX`
> -TEMPCONF=`mktemp temp-XXXX.bconf`
> +if [ -d "$1" ]; then
> +  TESTDIR=$1
> +else
> +  TESTDIR=.
> +fi
> +BOOTCONF=${TESTDIR}/bootconfig
> +
> +INITRD=`mktemp ${TESTDIR}/initrd-XXXX`
> +TEMPCONF=`mktemp ${TESTDIR}/temp-XXXX.bconf`
> +OUTFILE=`mktemp ${TESTDIR}/tempout-XXXX`
>  NG=0
>  
>  cleanup() {
> @@ -65,7 +72,6 @@ new_size=$(stat -c %s $INITRD)
>  xpass test $new_size -eq $initrd_size
>  
>  echo "No error messge while applying"
> -OUTFILE=`mktemp tempout-XXXX`
>  dd if=/dev/zero of=$INITRD bs=4096 count=1
>  printf " \0\0\0 \0\0\0" >> $INITRD
>  $BOOTCONF -a $TEMPCONF $INITRD > $OUTFILE 2>&1
> 


-- 
~Randy
Reported-by: Randy Dunlap <rdunlap@...radead.org>