Re: [Xen-devel] [PATCH] stubdom: simplify and fix Makefile

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Fri, Nov 04, 2016 at 10:53:29AM +0100, Juergen Gross wrote:
> The stubdom Makefile is setting up links for various libraries. This
> is done only once when qemu links are created and each library's links
> are updated/created only if the link for the Makefile of the library
> isn't already existing. In case a source is added to one library after
> doing the first make of stubdom the new source won't be linked by a
> new call of make.
> 

I think this is a bug, hence I intend to take this patch in 4.8.

> Instead of testing the existence of the Makefile link use a make
> dependency which will catch changes of the linked Makefile, too.
> 
> At the same time don't repeat the same link pattern 7 times but use a
> make macro to do the linking.
> 
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
> ---
>  stubdom/Makefile | 77 
> ++++++++++++++++++++++++++------------------------------
>  1 file changed, 35 insertions(+), 42 deletions(-)
> 
> diff --git a/stubdom/Makefile b/stubdom/Makefile
> index 2921f30..9b30b58 100644
> --- a/stubdom/Makefile
> +++ b/stubdom/Makefile
> @@ -305,7 +305,41 @@ ioemu/linkfarm.stamp:
>       touch ioemu/linkfarm.stamp
>  endif
>  
> -mk-headers-$(XEN_TARGET_ARCH): $(IOEMU_LINKFARM_TARGET)
> +define do_links
> +  touch $@

This should be moved to the last line of this macro.

If you agree on this, I can fix it up while committing.

> +  mkdir -p $(dir $@)include
> +  cd $(dir $@); \
> +  ln -sf $(dir $<)include/*.h include/; \
> +  ln -sf $(dir $<)*.[ch] .; \
> +  ln -sf $(dir $<)Makefile .
> +endef
> +

Wei.

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