netdev - Re: [RFC] dwarves/pahole: Add test scripts

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Date:   Thu, 25 Feb 2021 23:15:55 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     Jiri Olsa <jolsa@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Andrii Nakryiko <andriin@...com>, dwarves@...r.kernel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        Alexei Starovoitov <ast@...nel.org>,
        Yonghong Song <yhs@...com>, Hao Luo <haoluo@...gle.com>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...omium.org>,
        Sedat Dilek <sedat.dilek@...il.com>
Subject: Re: [RFC] dwarves/pahole: Add test scripts

On Wed, Feb 24, 2021 at 10:30:45AM -0700, Nathan Chancellor wrote:

SNIP

> > +
> > +build()
> > +{
> > +	local name=$1
> > +	local opts=$2
> 
> A more robust way to handle this might be
> 
> shift
> local opts=$@
> 
> > +
> > +	echo "build ${name} (${OUTPUT}/output)"
> > +
> > +	mkdir -p ${OBJECTS}/${name}
> > +	mkdir -p ${OUTPUT}
> > +
> > +	pushd ${KDIR}
> > +	make ${opts} -j"$(nproc)" O=${OUTPUT} olddefconfig > ${OUTPUT}/output 2>&1
> 
> Then change this to
> 
> make "${opts[@]}"
> 
> shellcheck complains about implicit word splitting (and finds some other
> things in the other script).

I have no doutbs ;-) ok

SNIP

> > +
> > +	PAHOLE=$(realpath ${PAHOLE})
> > +	OBJECTS=$(realpath ${OBJECTS})
> > +
> > +	echo "output:  ${OUTPUT}"
> > +	echo "kdir:    ${KDIR}"
> > +	echo "pahole:  ${PAHOLE}"
> > +	echo "objects: ${OBJECTS}"
> > +	echo
> > +
> > +	mkdir -p ${OBJECTS}
> > +
> > +	echo "cleanup ${KDIR}"
> > +	make -C ${KDIR} mrproper
> > +
> > +
> > +	build x86-clang     "LLVM=1"
> 
> With that change above, you could unquote these options and just pass
> them in as regular parameters.

ok I see, that'd be easier and better looking, I'll change this

> 
> > +	build x86-gcc       ""
> > +
> > +	build aarch64-clang "ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- LLVM=1"
> > +	build aarch64-gcc   "ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-"
> > +
> > +#	build powerpc-clang "ARCH=powerpc CROSS_COMPILE=powerpc64-linux-gnu- LLVM=1"
> > +	build powerpc-gcc   "ARCH=powerpc CROSS_COMPILE=powerpc64-linux-gnu-"
> > +
> > +#	build powerpcle-clang "ARCH=powerpc CROSS_COMPILE=powerpc64le-linux-gnu- LLVM=1"
> > +	build powerpcle-gcc   "ARCH=powerpc CROSS_COMPILE=powerpc64le-linux-gnu-"
> > +
> > +#	build s390x-clang   "ARCH=s390 CROSS_COMPILE=s390x-linux-gnu- LLVM=1"
> 
> powerpc64le and s390 can build with CC=clang, instead of LLVM=1.

I got some strange error when building ppc and s390 with LLVM=1,
but I did not check it deeply.. I'll try with CC=clang then, great

> 
> I will see if I can give this a run locally over the next week or so.

thanks,
jirka