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Date:      Tue, 19 Jan 2016 19:57:54 +0000
From:      Tom Vijlbrief <tvijlbrief@gmail.com>
To:        Mark Millard <markmi@dsl-only.net>, Ian Lepore <ian@freebsd.org>
Cc:        fehrist@codeghar.com, freebsd-arm <freebsd-arm@freebsd.org>
Subject:   Re: make buildworld failed with error "relocation truncated to fit: R_ARM_JUMP24 against symbol `_fini'"
Message-ID:  <CAOQrpVenGEfoNw4NiO92=PZ1MfkdooBsXjacK3a=iMEw%2Bo6GTw@mail.gmail.com>
In-Reply-To: <D058186F-3232-4215-96B9-E1A253F12CBE@dsl-only.net>
References:  <3E1CC674-D534-4C33-8C96-CA9E584931C0@dsl-only.net> <569D2557.3060802@codeghar.com> <C9C41590-3798-45D2-8F47-2A5AB4AA137A@dsl-only.net> <374A0F64-E3FC-42F1-AC03-DF8F88269AEB@dsl-only.net> <569D2D63.8030301@codeghar.com> <FF2B458C-5776-4797-9056-4CAA8DFECC43@dsl-only.net> <CAOQrpVeWUHNUoXAF_ko9NwXQcCkfuZNNbpFAJHTGnY_p5uu5sg@mail.gmail.com> <1453217670.46848.83.camel@freebsd.org> <D058186F-3232-4215-96B9-E1A253F12CBE@dsl-only.net>

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Op 20:46 DI 19 Jan 2016 schreef Mark Millard <markmi@dsl-only.net>:

> On 2016-Jan-19, at 7:34 AM, Ian Lepore <ian at freebsd.org> wrote:
> >
> > On Tue, 2016-01-19 at 11:58 +0000, Tom Vijlbrief wrote:
> >> Op ma 18 jan. 2016 20:37 schreef Mark Millard <markmi@dsl-only.net>:
> >>
> >>>
> >>> If you can tolerate tracking the 3.8.0 project (
> >>> base/projects/clang380-import ) until 3.8.0 is moved into 11.0
> >>> -CURRENT you
> >>> could find out that way if clang 3.8.0 behaves the same in your
> >>> context. So
> >>> far I've not come up with anything else
> >>
> >>
> >> I am having exactly the same buildworld problem on my RPI which used
> >> to
> >> build fine a week ago.
> >>
> >> Currently testing the clang380-import branch as suggested to see if
> >> the
> >> problem persists.
> >
> > The most confusing thing about this whole thread (besides the lack of
> > logs so we're just guessing what's going on) is why this problem is
> > suddenly happening on clang 3.7.x (I guess it's 3.7.x here) when that
> > has never been a problem before?  We needed to add the long-call option
> > when testing clang 3.8, but why do we suddenly need it on clang 3.7
> > that hasn't needed it for months?
> >
> > This very much has the feel of slapping a bandaid on something that
> > needs a better diagnosis (there may be internal bleeding).  If we don't
> > understand why it's failing, it doesn't make sense to try to fix it
> > with the "cure" for a different problem.  (Maybe we never understood
> > the clang 3.8 problem.)
> >
> > -- Ian
>
> The -mlong-calls were added to 11.0-CURRENT recently.
>
> -r293648: 2016-Jan-10 (head/lib/csu/arm/Makefile)
> -r294031: 2016-Jan-14 (the rest added here)
>
> May be a problem/incompleteness in the handling -mlong-calls itself? Are
> the above the right time frame for the problem starting for 3.7.1?
>
> The "rest" were:
>
> head/lib/clang.lib.mk
> head/lib/libc++/Makefile
> head/usr.bin/clang/clang/Makefile
> head/usr/bin/clang/lldb/Makefile
>
> (head/share/mk/bsd.lib.mk has had use of STATIC_CFLAGS and
> STATIC_CXXFLAGS for a long time.)
>
>
> Since 3.8.0 is now also to reported to fail I'll note that my "on rpi2"
> rebuild test was based on 3.8.0 and -r294179 for /usr/src and completed
> fine (in about 10 minutes under 14.5 hours). But I've consistently used:
>
> -target armv6--freebsd11.0-gnueabi -march=armv7a -mcpu=cortex-a7
> -mfloat-abi=softfp -mno-unaligned-access
>
> in my builds, including that one. So my activities are really a test for
> cortex-a7 handling, not armv6.
>
> But I had to use 3.8.0 because clang++ 3.7.1 would Bus Error during its
> buildworld activities. (I could buildkernel with 3.7.1 just fine.)
>
> ===
> Mark Millard
> markmi at dsl-only.net
>
> Just completed a standard 11-CURRENT cross buildworld for the RPI on an
amd64 without problems. The build on the RPI will take another 12 hours...


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