Re: undefined reference to `__multi3' when building with gcc 7.x

[James Hogan <james.hogan@mips.com>]

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On Sun, Dec 03, 2017 at 10:56:31AM +0100, Thomas Petazzoni wrote:
> Hello,
> 
> +James Hogan in Cc.
> 
> On Thu, 3 Aug 2017 22:55:47 +0200, Thomas Petazzoni wrote:
> 
> > When trying to build the current Linux master with a gcc 7.x toolchain
> > for mips64r6-n32, I'm getting the following build failure:
> > 
> > crypto/scompress.o: In function `.L31':
> > scompress.c:(.text+0x2a0): undefined reference to `__multi3'
> > drivers/base/component.o: In function `.L97':
> > component.c:(.text+0x4a4): undefined reference to `__multi3'
> > drivers/base/component.o: In function `component_master_add_with_match':
> > component.c:(.text+0x8c4): undefined reference to `__multi3'
> > net/core/ethtool.o: In function `ethtool_set_per_queue_coalesce':
> > ethtool.c:(.text+0x1ab0): undefined reference to `__multi3'
> > Makefile:1000: recipe for target 'vmlinux' failed
> > make[2]: *** [vmlinux] Error 1
> 
> I'm still facing this problem. There was a lengthy thread about it back
> in August when I reported the problem, but then it calmed down, with no
> real solution proposed.
> 
> Are there plans to fix this at some point?

I recently fixed a similar issue in 64r6[el]_defconfig, but its not the
same as it applies to all gcc versions on mips64r6. Given Ralf appears
to be busy I'll take a look.

Cheers
James

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