Re: [PATCH 2/2] kbuild: fix make -jN with multiple targets with make O=...

[Kalin KOZHUHAROV <kalin@thinrope.net>]

Sam Ravnborg wrote:
> [It is pushed out at:
> git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild.git]
> 
> The way multiple targets was handled with make O=...
> broke because for each high-level target make spawned
> a parallel make resulting in a broken build.
> Reported by Keith Owens <kaos@ocs.com.au>

When did it break? Are any of the released (not -git) kernels affected?

> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
> 
> ---
> 
>  Makefile |    7 ++++---
>  1 files changed, 4 insertions(+), 3 deletions(-)
> 
> 296e0855b0f9a4ec9be17106ac541745a55b2ce1
> diff --git a/Makefile b/Makefile
> index deedaf7..b3dd9db 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -106,12 +106,13 @@ KBUILD_OUTPUT := $(shell cd $(KBUILD_OUT
>  $(if $(KBUILD_OUTPUT),, \
>       $(error output directory "$(saved-output)" does not exist))
>  
> -.PHONY: $(MAKECMDGOALS)
> +.PHONY: $(MAKECMDGOALS) cdbuilddir
> +$(MAKECMDGOALS) _all: cdbuilddir
>  
> -$(filter-out _all,$(MAKECMDGOALS)) _all:
> +cdbuilddir:
>  	$(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
>  	KBUILD_SRC=$(CURDIR) \
> -	KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
> +	KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $(MAKECMDGOALS)
>  
>  # Leave processing to above invocation of make
>  skip-makefile := 1

Kalin.
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