[Buildroot] [PATCH for-next 2/3] package/swig: enable PCRE regex matching in host-swig

[Thomas Petazzoni <thomas.petazzoni@bootlin.com>]

Hello,

+Arnout, Yann, Peter in Cc.

On Wed, 29 May 2019 17:16:54 +0200
Romain Naour <romain.naour@gmail.com> wrote:

> The upcoming ogre package needs a host swig binary with PCRE
> regex support.
> 
> Signed-off-by: Romain Naour <romain.naour@gmail.com>
> ---
>  package/swig/swig.mk | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

I never really like the addition of mandatory host package dependencies
just for the sake of one use case. I was considering adding a hidden
BR2_PACKAGE_HOST_PCRE option for this, but since pcre takes only 17
seconds to build, maybe it was not worth the effort. So I've applied to
next as-is, but I'd be interested to know what Arnout/Peter/Yann thing
about adding a hidden BR2_PACKAGE_HOST_PCRE hidden option for that kind
of situation. We had decided to not systematically add such options in
all host packages, but that we could add some in a case-by-case basis.
This case-by-case basis however will look "weird": ogre would have
host-swig in its <pkg>_DEPENDENCIES, but in Config.in would select
BR2_PACKAGE_HOST_PCRE and not BR2_PACKAGE_HOST_SWIG. This could start
getting a bit clunky.

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com