On Wed, 21 Jun 2017 10:17:11 +0900
Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx> wrote:
> Hi Nicholas,
>
> 2017-06-20 0:52 GMT+09:00 Nicholas Piggin <npiggin@xxxxxxxxx>:
> >>
> >> masahiro@pug:~$ xtensa-linux-ld -v
> >> GNU ld (GNU Binutils) 2.24
> >
> > Ah, thank you. It must have been that the 0day build (cc'ed) did
> > not return any error to be from the ld internal error.
> >
> > This has led me to the true cause of the error which is the way
> > external archives are handled. After implementing the fix, I think
> > the lib.a size regression for thin archives should be solved as
> > well.
>
>
> Thanks for figuring this out!
>
>
> > This patch should be added between patches 2 and 3 of this series.
> >
>
> Done.
>
>
> I applied all 6 patches to linux-kbuild/thin-ar.
>
> I fixed up some:
>
> [1] fix a typo "tihs" -> "this"
> [2] reword the document as "The build system has, as of 4.13, switched
> to using..."
> [3] Add "P" to link_vmlinux.sh as well
>
>
> Could you double-check if I did them correctly?
Yes these look good to me, thank you.
> > --- a/Makefile
> > +++ b/Makefile
> > @@ -952,19 +952,20 @@ core-y := $(patsubst %/, %/built-in.o, $(core-y))
> > drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
> > net-y := $(patsubst %/, %/built-in.o, $(net-y))
> > libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
> > -libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
> > +libs-y2 := $(filter-out %.a, $(patsubst %/, %/built-in.o, $(libs-y)))
> > libs-y := $(libs-y1) $(libs-y2)
>
>
> After I applied this patch, I noticed one more thing.
>
> With this patch, I think "libs-y" will be unnecessary.
>
> If you ack me to fix-up locally, I will remove:
> libs-y := $(libs-y1) $(libs-y2)
Yes I suppose that can be removed.
I wonder if the names could be a bit more descriptive?
libs-y-liba
libs-y-builtin
?
> > @@ -50,7 +57,7 @@ archive_builtin()
> > if [ -n "${CONFIG_THIN_ARCHIVES}" ]; then
> > info AR built-in.o
> > rm -f built-in.o;
> > - ${AR} rcsT${KBUILD_ARFLAGS} built-in.o \
> > + ${AR} rcsTP${KBUILD_ARFLAGS} built-in.o \
> > ${KBUILD_VMLINUX_INIT} \
> > ${KBUILD_VMLINUX_MAIN}
> > fi
>
> I moved this hunk to 2/6 "thin archives use P option to ar".
Thanks,
Nick
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