[Buildroot] [PATCH] Revert "package/pkg-generic.mk: create directories upfront in the configure step"

[Yann E. MORIN <yann.morin.1998@free.fr>]

All,

On 2020-08-01 14:01 +0200, Yann E. MORIN spake thusly:
> This _partially_ reverts commit 2dbb0660fb4d89f8eac86fcff08e9b3d0a705917.
> 
> Indeed, before 2dbb0660fb, the per-package ../host/ directory was
> explicitly created right before it was populated. With 2dbb0660fb, it
> is now created only at the begining of the configure step.
> 
> However, some packages may have download or extract host dependencies,
> and when we are trying to rsync them, the destination .../host/
> directory does not yet exist at the download or wxtract steps, thus the
> build fails. E.g., with wget which needs host-lzip if the system does
> not have it yet:
> 
>     rsync -a --link-dest=/home/ymorin/dev/buildroot/O/per-package/host-lzip/host/ /home/ymorin/dev/buildroot/O/per-package/host-lzip/host/ /home/ymorin/dev/buildroot/O/per-package/wget/host
>     rsync: mkdir "/home/ymorin/dev/buildroot/O/per-package/wget/host" failed: No such file or directory (2)
>     rsync error: error in file IO (code 11) at main.c(682) [Receiver=3.1.3]
>     make[1]: *** [package/pkg-generic.mk:170: /home/ymorin/dev/buildroot/O/build/wget-1.20.3/.stamp_extracted] Error 11
> 
> Kudos to Raphael for pin-pointing the culprit commit.
> 
> Fixes:
>     http://autobuild.buildroot.org/results/4c8/4c895c7ac0a635d38f5015b5df0393581ad7b508/
>     and a slew of similar failures
> 
> Notes:
> An alternatative solution would be to move the creation of the
> directories from the configure step to the download step *and* to the
> rsync step, but this is not so nice in the end... Let's just ensure they
> are created where needed: at the configure step, and when populating
> them.
> 
> Reported-by: Raphael Jacob <r.jacob2002@gmail.com>
> Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
> Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

Applied to master.

Thomas, I applied as a stop-gap measure, but also because I believe this
is semantically correct to do so.

Should you think otherwise, this leaves us a bit more time to devise a
better solution.

Regards,
Yann E. MORIN.

> ---
>  package/pkg-utils.mk | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/package/pkg-utils.mk b/package/pkg-utils.mk
> index f6de295b7f..ad7a84475a 100644
> --- a/package/pkg-utils.mk
> +++ b/package/pkg-utils.mk
> @@ -167,6 +167,7 @@ ifeq ($(BR2_PER_PACKAGE_DIRECTORIES),y)
>  # $2: 'host' or 'target'
>  # $3: destination directory
>  define per-package-rsync
> +	mkdir -p $(3)
>  	$(foreach pkg,$(1),\
>  		rsync -a --link-dest=$(PER_PACKAGE_DIR)/$(pkg)/$(2)/ \
>  		$(PER_PACKAGE_DIR)/$(pkg)/$(2)/ \
> -- 
> 2.20.1
> 

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