Re: [PATCH 1/2] powerpc/boot: Expose Kconfig symbols to wrapper

On Thu, 11 Oct 2018 at 10:32, Michael Ellerman [off-list ref] wrote:

Michael Ellerman [off-list ref] writes:

quoted

Joel Stanley [off-list ref] writes:

quoted

diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 0fb96c26136f..eeed74e0dfca 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile

@@ -197,9 +197,14 @@ $(obj)/empty.c:
 $(obj)/zImage.coff.lds $(obj)/zImage.ps3.lds : $(obj)/%: $(srctree)/$(src)/%.S
     $(Q)cp $< $@

+$(obj)/serial.c: $(obj)/autoconf.h
+
+$(obj)/autoconf.h: $(obj)/%: $(srctree)/include/generated/%
+    $(Q)cp $< $@
+

This gives me:
  make[2]: *** No rule to make target '../include/generated/autoconf.h', needed by 'arch/powerpc/boot/autoconf.h'.  Stop.

The ../ is $(srctree).

Seems autoconf.h is in objtree:

  ~/linux$ make O=build prepare
  ...
  ~/linux$ find . -name autoconf.h
  ./drivers/staging/rtl8723bs/include/autoconf.h
  ./tools/testing/radix-tree/generated/autoconf.h
  ./build/include/generated/autoconf.h

Ah. That's obvious now that you point it out. Obviously myself and
0day do in-tree builds.

So I'll fix that up.

Thanks!