[Buildroot] [PATCH 2/2] infra/pkg-kconfig: require an non-empty KCONFIG_FILE
Arnout Vandecappelle
arnout at mind.be
Wed Apr 8 20:22:00 UTC 2015
On 08/04/15 19:08, Yann E. MORIN wrote:
> Currently, we only check that the variable is defined, which is not
> enough since we really want it to be non-empty.
Have you tested this? According to the make documentation, this is not true...
>
> We however can't check it points to an existing file, because the
> package might well not be extracted yet, and we may use an internal
> defconfig. If that file does not eventually exist, there will be a
> failure down the road at build time when we try to copy it...
>
> Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
> Cc: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
> Cc: Thomas De Schampheleire <patrickdepinguin at gmail.com>
> ---
> package/pkg-kconfig.mk | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/package/pkg-kconfig.mk b/package/pkg-kconfig.mk
> index fd9f19d..fe8d266 100644
> --- a/package/pkg-kconfig.mk
> +++ b/package/pkg-kconfig.mk
> @@ -68,7 +68,7 @@ $$($(2)_TARGET_CONFIGURE): $$($(2)_DIR)/.stamp_kconfig_fixup_done
> ifeq ($$($$($(2)_KCONFIG_VAR)),y)
>
> # FOO_KCONFIG_FILE is required
> -ifndef $(2)_KCONFIG_FILE
> +ifeq ($$($(2)_KCONFIG_FILE),)
These two are exactly the same, cfr. [1]:
> The 'ifdef' form takes the _name_ of a variable as its argument,
> not a reference to a variable. The value of that variable has a
> non-empty value, the TEXT-IF-TRUE is effective; otherwise, the
^^^^^^^^^^^^^^^
> TEXT-IF-FALSE, if any, is effective. Variables that have never
> been defined have an empty value. The text VARIABLE-NAME is
> expanded, so it could be a variable or function that expands to the
^^^^^^^^
> name of a variable.
Regards,
Arnout
[1] https://www.gnu.org/software/make/manual/html_node/Conditional-Syntax.html
> $$(error Internal error: no value specified for $(2)_KCONFIG_FILE)
> endif
>
>
--
Arnout Vandecappelle arnout at mind be
Senior Embedded Software Architect +32-16-286500
Essensium/Mind http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium BE 872 984 063 RPR Leuven
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