[Buildroot] ipv6 and eglibc

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Dear Marco Trapanese,

On Tue, 18 Feb 2014 09:40:00 +0100, Marco Trapanese wrote:

> I'm trying to add the postgres package, starting with this hints:
> 
> http://www.slideshare.net/jerome42/create-lightweight-docker-containers-with-buildroot
> 
> I'm using the eglibc in order to enable the eglsf support for Qt5.
> Postgresql requires the BR2_TOOLCHAIN_BUILDROOT_INET_IPV6.
> 
> Searching for this keyword I see this:
> 
> Symbol: BR2_TOOLCHAIN_BUILDROOT_INET_IPV6 [=n] ?
> Type : boolean
> Prompt: Enable IPv6 support
> Location:
> -> Toolchain
> Defined at package/uclibc/Config.in:70
> Depends on: BR2_TOOLCHAIN_BUILDROOT [=y] && 
> BR2_TOOLCHAIN_BUILDROOT_UCLIBC [=n]
> Selects: BR2_INET_IPV6 [=y] ?
> 
> I guess because I'm using eglibc instead of uclibc.

This is because what J?r?me (who happens to be my cousin) did was
not completely correct (and I've Cc'ed J?r?me so he gets this
feedback!).

Having a dependency on BR2_TOOLCHAIN_BUILDROOT_INET_IPV6 in a package
is incorrect, as it only works with the internal toolchain backend,
when building uClibc toolchains.

Instead, he should have read the great Buildroot documentation at
http://buildroot.org/downloads/manual/manual.html#dependencies-target-toolchain-options :-)

So, Marco, just modify the line:

	depends on BR2_TOOLCHAIN_BUILDROOT_INET_IPV6

by:

	depends on BR2_INET_IPV6

Also, please submit patches to add Postgresql support. Instead of
having people following the not-completely correct tutorial of J?r?me,
we would have Postgresql support in Buildroot itself.

Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com