Re: [Buildroot] [PATCH 5/5] package/librsvg: fix svg with gdk-pixbuf

[Thomas Petazzoni via buildroot <buildroot@buildroot.org>]

Hello,

On Thu,  5 Sep 2024 18:24:02 +0200
"Guillaume GC. Chaye" <guillaume.chaye@zeetim.com> wrote:

> Signed-off-by: Guillaume GC. Chaye <guillaume.chaye@zeetim.com>

Thanks for the patch. However, it really, really needs a non-empty
commit log with some explanation.

> diff --git a/package/librsvg/librsvg.mk b/package/librsvg/librsvg.mk
> index 81a6667817..0187218a98 100644
> --- a/package/librsvg/librsvg.mk
> +++ b/package/librsvg/librsvg.mk
> @@ -12,7 +12,7 @@ LIBRSVG_INSTALL_STAGING = YES
>  LIBRSVG_CONF_ENV = \
>  	LIBS=$(TARGET_NLS_LIBS) \
>  	RUST_TARGET=$(RUSTC_TARGET_NAME)
> -LIBRSVG_CONF_OPTS = --disable-pixbuf-loader --disable-tools
> +LIBRSVG_CONF_OPTS = --disable-tools

You're removing --disable-pixbuf-loader, so probably it means that
pixbuf-loader support is important... so we probably need
--enable-pixbuf-loader, no?

>  HOST_LIBRSVG_CONF_OPTS = --enable-introspection=no
>  LIBRSVG_DEPENDENCIES = cairo host-gdk-pixbuf gdk-pixbuf host-rustc libglib2 libxml2 pango \
>  	$(TARGET_NLS_DEPENDENCIES)
> @@ -30,5 +30,22 @@ else
>  LIBRSVG_CONF_OPTS += --disable-introspection
>  endif
>  
> +# gdk-pixbuf requires the loaders.cache file populated to work properly

gdk-pixbuf? I guess this is due to a copy/paste.

> +# Rather than doing so at runtime, since the fs can be read-only, do so
> +# here after building and installing to target.
> +# And since the cache file will contain relative host directory names we
> +# need to prepend them with /usr/.
> +ifeq ($(BR2_STATIC_LIBS),)
> +define LIBRSVG_PIXBUF_UPDATE_CACHE
> +	GDK_PIXBUF_MODULEDIR=$(HOST_DIR)/lib/gdk-pixbuf-2.0/2.10.0/loaders \
> +		$(HOST_DIR)/bin/gdk-pixbuf-query-loaders \
> +		> $(TARGET_DIR)/usr/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache
> +	$(SED) 's,^"lib,"/usr/lib,g' \
> +		$(TARGET_DIR)/usr/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache
> +endef
> +LIBRSVG_POST_INSTALL_TARGET_HOOKS += LIBRSVG_PIXBUF_UPDATE_CACHE

Why do we need this a second time, when it's already done in
package/gdk-pixbuf/gdk-pixbuf.mk ? Also the 2.10.0 hardcoded here is
probably wrong? Maybe it's already wrong in gdk-pixbuf.mk?

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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