Re: kernel 4.18+ build problem "Recursive variable 'KBUILD_CFLAGS' "

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On Sun, 2018-09-23 at 22:03 +0200, Johannes Berg wrote:
> On Sun, 2018-09-23 at 16:16 +0200, Hauke Mehrtens wrote:
> > Hi,
> > 
> > I tried to compile backports against kernel 4.18 and 4.19-rc4 (header
> > files from Ubuntu) and ran into this problem when it wants to link the
> > kernel:
> > 
> >   LD [M]
> > /home/hauke/compat-wireless/backports-4.19-rc4-1/drivers/net/wireless/realtek/rtlwifi/rtl_usb.o
> >   Building modules, stage 2.
> > scripts/Makefile.lib:10: *** Recursive variable 'KBUILD_CFLAGS'
> > references itself (eventually).  Stop.
> Hmm. I vaguely remember something like that with our driver, but can't
> find it now? I also remember trying to fix it in the upstream kernel ...

Hmm. Well, I can't find any changes from me upstream in this area, so
either I didn't succeed or it didn't get applied. I also can't find a
public record of a patch, so I guess I didn't succeed?

Seems simple enough though, just make cc-option := instead of = in
scripts/Kbuild.include? Or maybe not, dunno.

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