[Buildroot] Missing 'sys/queue.h' on musl

[Yann E. MORIN <yann.morin.1998@free.fr>]

Thomas, All,

On 2015-11-29 09:28 +0100, Thomas Petazzoni spake thusly:
> On Sat, 28 Nov 2015 18:42:37 -0200, Sergio Prado wrote:
> > Instead of making each package that needs 'sys/queue.h' select this
> > package, it would be better to select this package automatically when a
> > musl toolchain is used. That way, we won't need to change any package.
> > 
> > It is possible to do that?
> 
> Well, we could probably put this logic in the toolchain virtual
> package, since it is the common point between the internal toolchain
> and external toolchain backends (and we need sys/queue.h in both cases).
> 
> However, I am not sure if I wouldn't prefer packages that need
> sys/queue.h to have an explicit dependency on the package installing
> sys/queue.h. Since such package would itself have no dependency, it
> would be just a matter of adding "select BR2_PACKAGE_SYS_QUEUE" in
> Config.in and adding "sys-queue" in <pkg>_DEPENDENCIES.
> 
> Peter, Arnout, Yann, your opinion?

I think it is best to handle it as a dependency of the toolchain
package. That way, it is transparent to packages.

That musl refuses to carry a sys/queue.h on philosophical reasons (as
they explain in their FAQ) while all the other main C libraries do (even
newlib!) is not ground for making it difficult for packagers to add a
new package.

Adding such a package would be a Buildroot peculiarity, which I would
prefer we avoid.

Regards,
Yann E. MORIN.

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