linux-kernel - Re: Build failure in -next due to 'sh: thin archives fix linking'

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Message-ID: <20170628225837.25abba1e@roar.ozlabs.ibm.com>
Date:   Wed, 28 Jun 2017 22:58:37 +1000
From:   Nicholas Piggin <npiggin@...il.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Build failure in -next due to 'sh: thin archives fix linking'

On Wed, 28 Jun 2017 05:38:50 -0700
Guenter Roeck <linux@...ck-us.net> wrote:

> Hi,
> 
> I see the following build error in -next when building sh:rts7751r2dplus_defconfig.
> 
> sh4-linux-ld: arch/sh/kernel/vsyscall/vsyscall-dummy.o: compiled for a big endian system and target is little endian
> sh4-linux-ld: arch/sh/kernel/vsyscall/vsyscall-dummy.o: uses instructions which are incompatible with instructions used in previous modules
> sh4-linux-ld: failed to merge target specific data of file arch/sh/kernel/vsyscall/vsyscall-dummy.o
> make[2]: *** [arch/sh/kernel/vsyscall/vsyscall-syms.o] Error 1
> 
> Bisect points to 'sh: thin archives fix linking' as the culprit. Bisect log is attached.
> I tried with gcc 4.8.3 and 6.3.0, both built with buildroot for sh4eb.

Thanks for the report. In arch/sh/kernel/vsyscall/Makefile, the line:

 cmd_syscall_syms = $(LD) -r -o $@ -R $<

Can you try adding $(LDFLAGS), e.g. change it to:

 cmd_syscall_syms = $(LD) $(LDFLAGS) -r -o $@ -R $<

Thanks,
Nick