[Buildroot] [PATCH for-master] package/strace: disable libmpers with musl toolchains

[Baruch Siach]

Hi Thomas,

On Sun, Nov 13, 2016 at 12:55:18PM +0100, Thomas Petazzoni wrote:
> On Sat, 12 Nov 2016 16:30:12 +0100, Romain Naour wrote:
> > strace bundle some kernel headers to build libmpers, this mixes userspace
> > headers and kernel headers which break the build with musl.
> > The stddef.h from gcc is used instead of the one from musl.
> > 
> > Disable libmpers for musl toolchains.
> > 
> > Fixes:
> > http://autobuild.buildroot.net/results/6f6/6f63fa2537ff316ba259a20966faadcf5ab9deff
> > 
> > Signed-off-by: Romain Naour <romain.naour at gmail.com>
> 
> Hum, Alpine Linux is not doing this, and they support strace 4.14. Why
> are we having this issue and not Alpine Linux?
> 
> I've asked on #musl, we'll see if they come back with some explanation.

I think they are tweaking the headers in some way to make them more compatible 
with many packages. I investigate the tcpreplay musl build issue that the 
autobuilder shows. It turns out that there is an upstream commit[1] fixing 
some musl build issues. When I tested it I found that is still a 'struct 
ethhdr' conflict, even with the compatibility hack[2] applied. There must be 
something else in patch author's environment that avoids this issue.

[1] https://github.com/appneta/tcpreplay/commit/7c942b71d4ace7425a26e4670f8fbd5814b2339b
[2] http://patchwork.ozlabs.org/patch/693222/

baruch

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