[CRIU] [PATCH] build: Simplify piegen usage

[Laurent Dufour]

Thanks Cyrill, this fix the issue I faced when building with -j 78.

Tested-by: Laurent Dufour <ldufour at linux.vnet.ibm.com>

On 17/02/2016 14:34, Cyrill Gorcunov wrote:
> - no need for phony pie/piegen, redundant and rather may
>   cause double execution of a target;
> - drop $(ARCH_DIR) from pie deps, initially it should be syscall-lib,
>   but pie/lib.a already has it.
> 
> Signed-off-by: Cyrill Gorcunov <gorcunov at openvz.org>
> ---
>  criu/Makefile | 9 +++------
>  1 file changed, 3 insertions(+), 6 deletions(-)
> 
> diff --git a/criu/Makefile b/criu/Makefile
> index b009c7b92fdb..73889f2b7381 100644
> --- a/criu/Makefile
> +++ b/criu/Makefile
> @@ -110,16 +110,13 @@ PHONY += $(ARCH-LIB)
>  #
>  # piegen tool needed for PIE code.
>  ifeq ($(piegen-y),y)
> -piegen			:= pie/piegen/piegen
> +piegen-bin		:= pie/piegen/piegen
> 
>  pie/piegen/%: config
>  	$(Q) CC=$(HOSTCC) LD=$(HOSTLD) CFLAGS="$(HOSTCFLAGS) $(WARNINGS) $(DEFINES)" $(MAKE) $(build)=pie/piegen $@
> -pie/piegen: config
> -	$(Q) CC=$(HOSTCC) LD=$(HOSTLD) CFLAGS="$(HOSTCFLAGS) $(WARNINGS) $(DEFINES)" $(MAKE) $(build)=pie/piegen all
> -$(piegen): pie/piegen/built-in.o
> +$(piegen-bin): pie/piegen/built-in.o
>  	$(call msg-link, $@)
>  	$(Q) $(HOSTCC) $(HOSTCFLAGS) $^ $(LDFLAGS) -o $@
> -PHONY += pie/piegen
>  endif
> 
>  #
> @@ -129,7 +126,7 @@ pie/lib.a: $(ARCH-LIB) $(SYSCALL-LIB)
> 
>  #
>  # PIE code blobs themseves.
> -pie: $(ARCH_DIR) $(piegen) pie/lib.a
> +pie: $(piegen-bin) pie/lib.a
>  	$(Q) $(MAKE) $(build)=pie all
>  PHONY += pie
>