[Buildroot] musl with kernel headers (was: [PATCH] bridge-utils: fix build with musl)

[Baruch Siach]

Hi Thomas,

On Thu, Nov 03, 2016 at 10:46:56PM +0100, Thomas Petazzoni wrote:
> > In a discussion of this issue on the musl list last year Rich Felker
> > suggested[1] the following hack for fixing the widespread musl issue with
> > packages using kernel headers:
> > 
> >  --- usr/include/linux/libc-compat.h-orig	2016-11-03 07:25:09.853807823 +0200
> >  +++ usr/include/linux/libc-compat.h	2016-11-03 07:25:49.602834223 +0200
> >  @@ -49,7 +49,7 @@
> >   #define _LIBC_COMPAT_H
> > 
> >   /* We have included glibc headers... */
> >  -#if defined(__GLIBC__)
> >  +#if 1
> > 
> >   /* Coordinate with glibc net/if.h header. */
> >   #if defined(_NET_IF_H) && defined(__USE_MISC)
> > 
> > I verified that it fixes this build failure. What do you think of that as a
> > temporary measure until musl finds a better solution[2]?
> 
> Yes, we probably need to do something like that. I'm sick of all the
> patches we need to fix this structure redefinition mess, so if we have
> a global solution, it would be nice. I guess it needs to be applied in
> both the linux-headers package and the toolchain-external package.

I was thinking if a sed call in TOOLCHAIN_TARGET_FINALIZE_HOOKS to simplify 
the hack. Would that work?

baruch

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