linux-kernel - Re: [3.7-rc6] Build failure with scripts/Makefile.headersinst

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Message-Id: <201211192202.IBE48444.VHFLtOSOQFOMJF@I-love.SAKURA.ne.jp>
Date:	Mon, 19 Nov 2012 22:02:15 +0900
From:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:	dhowells@...hat.com
Cc:	arnd@...db.de, tglx@...utronix.de, paulmck@...ux.vnet.ibm.com,
	davej@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [3.7-rc6] Build failure with scripts/Makefile.headersinst

David Howells wrote:
> The version of the compiler shouldn't have any effect as far as I can see.
> Can you add the following:
> 
> 	$(info XXXX $(srcdir)/$(hdr)) \
> 	$(info YYYY $(oldsrcdir)/$(hdr)) \
> 
> immediately before the marked line and look for the lines in the output from
> make.  The error suggests that neither pattern match worked.

Inserting

	$(info XXXX $(srcdir)/$(hdr)), \
	$(info YYYY $(oldsrcdir)/$(hdr)), \

did not work.

> Btw, are you supplying an O= flag to make when you build?

No. But supplying V=1 revealed that $(_dst) is an empty string at

  # Recursion
  hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
  .PHONY: $(subdirs)
  $(subdirs):
          $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@

when using GNU Make 3.80, while $(_dst) contains appropriate string when using
GNU Make 3.81.



With Make 3.81:
make -f scripts/Makefile.build obj=scripts build_unifdef
make -rR -f /usr/src/all/linux/scripts/Makefile.headersinst obj=include/uapi
make -rR -f /usr/src/all/linux/scripts/Makefile.headersinst obj=include/uapi/asm-generic dst=include/uapi/asm-generic
make -rR -f /usr/src/all/linux/scripts/Makefile.headersinst obj=include/uapi/drm dst=include/uapi/drm
make -rR -f /usr/src/all/linux/scripts/Makefile.headersinst obj=include/uapi/linux dst=include/uapi/linux
make -rR -f /usr/src/all/linux/scripts/Makefile.headersinst obj=include/uapi/linux/byteorder dst=include/uapi/linux/byteorder
make -rR -f /usr/src/all/linux/scripts/Makefile.headersinst obj=include/uapi/linux/caif dst=include/uapi/linux/caif
(...snipped...)

With Make 3.80:
make -f scripts/Makefile.build obj=scripts build_unifdef
make -rR -f /usr/src/all/linux/scripts/Makefile.headersinst obj=include/uapi
make -rR -f /usr/src/all/linux/scripts/Makefile.headersinst obj=include/uapi/asm-generic dst=/asm-generic
/usr/src/all/linux/scripts/Makefile.headersinst:50: *** Missing UAPI file /usr/src/all/linux/include/uapi/asm-generic/auxvec.h.  Stop.
make[2]: *** [asm-generic] Error 2
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