[Buildroot] [PATCH] pkg-kernel-module: Die when kernel modules are disabled

[Yann E. MORIN]

Noé, All,

On 2015-08-14 11:58 +0200, Noé Rubinstein spake thusly:
> Test the config of the kernel to see if loadable module support is
> enabled, and error out otherwise. This makes the build failure less
> confusing.
> 
> Signed-off-by: Noé Rubinstein <nrubinstein at aldebaran.com>
> ---
>  package/pkg-kernel-module.mk | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/package/pkg-kernel-module.mk b/package/pkg-kernel-module.mk
> index 5fb19be..e7dc33e 100644
> --- a/package/pkg-kernel-module.mk
> +++ b/package/pkg-kernel-module.mk
> @@ -60,6 +60,10 @@ $(2)_MODULE_SUBDIRS ?= .
>  # includes and other support files (Booo!)
>  define $(2)_KERNEL_MODULES_BUILD
>  	@$$(call MESSAGE,"Building kernel module(s)")
> +	@if ! grep -Fqx 'CONFIG_MODULES=y' $(LINUX_DIR)/.config; then \
> +		echo ERROR: Kernel does not support loadable modules; \

Message should be quoted (and my presonal preference is to use printf,
but echo is OK):

    echo "ERROR: Kernel does not support loadable modules"; \

> +		false; \

I prefer we 'exit 1' instead, it's much obvious what the intent is. And
that's what we used about anywhere else when we do sanity checks (see
for example toolchain/helpers.mk, most "exit 1", while a few "exit -1").

Please use "exit 1", fix the quoting, add my acked-by, and respin:

    Acked-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>

Regards,
Yann E. MORIN.

> +	fi
>  	$$(foreach d,$$($(2)_MODULE_SUBDIRS), \
>  		$$(LINUX_MAKE_ENV) $$($$(PKG)_MAKE) \
>  			-C $$(LINUX_DIR) \
> -- 
> 2.1.4
> 
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