Date: Mon, 14 Jul 2014 14:41:49 -0600 From: Ian Lepore <ian@FreeBSD.org> To: Andreas Tobler <andreast-list@fgznet.ch> Cc: freebsd-arm@freebsd.org Subject: Re: [Bug 175605] devel/binutils: please fix build binutils-2.23.1 in raspberry pi Message-ID: <1405370509.1312.11.camel@revolution.hippie.lan> In-Reply-To: <53C19400.6050404@fgznet.ch> References: <201407121943.s6CJhT2p097909@mech-cluster241.men.bris.ac.uk> <53C19400.6050404@fgznet.ch>
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On Sat, 2014-07-12 at 22:01 +0200, Andreas Tobler wrote:
> On 12.07.14 21:43, Anton Shterenlikht wrote:
> >>> --- Comment #6 from mexas@bris.ac.uk ---
> >>> Forgot to say that this was with Andreas Tobler's patchset.
> >>> Also, it segfaults with the OS default ld too:
> >>>
> >>> $ cat z.c
> >>> #include <stdio.h>
> >>> int main(int argc, char **argv)
> >>> {
> >>> printf("mumu\n");
> >>> return 0;
> >>> }
> >>> $ cc -c z.c -Wall
> >>> $ /usr/local/bin/ld -o z /usr/lib/crt1.o /usr/lib/crti.o z.o -lc
> >>> $ ldd z
> >>> z:
> >>> libc.so.7 => /lib/libc.so.7 (0x2003c000)
> >>> $ file z
> >>> z: ELF 32-bit LSB executable, ARM, version 1 (SYSV), dynamically linked (uses
> >>> shared libs), for FreBSD 10.0 (1000710), not stripped
> >>> $ ./z
> >>> Segmentation fault (core dumped)
> >>> $ /usr/bin/ld -o z /usr/lib/crt1.o /usr/lib/crti.o z.o -lc
> >>> $ ldd z
> >>> z:
> >>> libc.so.7 => /lib/libc.so.7 (0x2003c000)
> >>> $ file z
> >>> z: ELF 32-bit LSB executable, ARM, version 1 (SYSV), dynamically linked (uses
> >>> shared libs), for FreBSD 10.0 (1000710), not stripped
> >>> $ ./z
> >>> Segmentation fault (core dumped)
> >>> $
> >>>
> >> Why are you using this strange invocation of the linker? If I run
> >> "cc -v -o z z.c", here is how it invokes ld:
> >>
> >> "/usr/bin/ld" --eh-frame-hdr -dynamic-linker /libexec/ld-elf.so.1
> >> --hash-style=both --enable-new-dtags -o z /usr/lib/crt1.o
> >> /usr/lib/crti.o /usr/lib/crtbegin.o -L/usr/lib /tmp/z-9530c3.o -lgcc
> >> --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s
> >> --no-as-needed /usr/lib/crtend.o /usr/lib/crtn.o
> >>
> >> The resulting program runs without difficulty. -- George
> >
> > well, I copied my invocation from:
> > http://people.freebsd.org/~rene/patches/binutils-rpi-bug.txt
> >
> > but you are right. I have now did just the same
> > using /usr/local/bin/ld, and the executable worked.
> >
> > So probably Andreas Tobler's patchset should
> > be committed?
> >
> > I'm building lang/gcc right now, will see how it goes.
>
> You can save the time for gcc. Nothing else than the system gcc works.
> I do some work on gcc-4.10 and it is hairy.
> I can bootstrap gcc-4.10 but I have some issues with tls which blocks me
> to come out with my patch set. The overall view is good.
> I even have C++ exceptions working with EABI.
We are actively working on this at $work (using clang, not gcc) and I'd
love to see whatever patches you've got. I was about to import netbsd's
find_exidx.c for ld-elf.so, but if you've already done it I won't
bother. There are other aspects of it still not working for us, so
maybe you've solved things we're still working on.
>
> Also, the binutils patch set is not satisfying for me. I do not have
> feedback for arm*b nor for arm* < FreeBSD 10.0.
>
I doubt you'll ever get feedback for either of these. We only have 2 or
3 users who have hardware and are even trying to use armeb these days.
The hardware is old and rare. -current only became usable again on
armeb in the past week or two.
As for arm on < 10, there's not much support. and not many active users.
It's not an official project policy or anything, but in effect we've
abandoned active support on anything older than 10 due to lack of
resources. We use 8.2 with arm at work, and all the patches we've
generated there over the years have been merged to 8, 10, and 11.
9.x on arm has always been a nonexistant thing for me. I don't know of
anybody even trying to use it, based on the traffic on irc and mailing
lists.
-- Ian
> And last but not least, my time slot is shrinking, summer holidays ;)
>
> Anton, thanks for your testing and feedback.
>
> Andreas
>
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