[OE-core] musl thoughts

[Andreas Müller]

On Sat, Mar 23, 2019 at 10:53 PM Adrian Bunk <bunk at stusta.de> wrote:
>
> On Sat, Mar 23, 2019 at 10:22:15PM +0100, Andreas Müller wrote:
> > On Sat, Mar 23, 2019 at 10:16 PM Adrian Bunk <bunk at stusta.de> wrote:
> > >
> > > On Fri, Mar 22, 2019 at 03:18:01PM -0700, Khem Raj wrote:
> > > >...
> > > > There are certain design aspects of musl which are actually turning
> > > > out to be good
> > > > e.g. there is no __MUSL__ define, so non-portable code can not be
> > > > hidden which is a good thing,
> > > >...
> > >
> > > Please take a closer look at some of the musl changes to NM that made
> > > upgrading NM so hard for Andreas.
> > >
> > > +#if defined(__GLIBC__)
> > >  #include <net/ethernet.h>
> > > +#else /* musl libc */
> > > +#define ETH_ALEN       6               /* Octets in one ethernet addr   */
> > > +#endif
> > >
> > > Using __GLIBC__ in workarounds for bugs in musl is wrong,
> > > and cannot be upstreamed since it would do the wrong thing
> > > on other non-broken C libraries.
> > >
> > > > While the eyes may hurt
> > > > to see them, it does serve a
> > > > good reminder of whats needed for a given package.
> > > >...
> > >
> > > Who is responsible for fixing the root causes of such bugs in musl,
> > > so that the workaround patches can be dropped from packages like NM?
> > >
> > > cu
> > > Adrian
> > If I am not mistaken nobody is responsible. It is recipe wise: Sending
> > out a patch that fails for musl is rejected usually.
>
> As you have experienced, it does create a huge technical debt to ship
> workaround patches in several recipes instead of fixing the bug in musl.
>
> > The last example could be fixed easily at musl shipping a ethernet.h containing
> > #define ETH_ALEN       6
> >...
>
> That's already shipped by musl.
>
> But there seems to be some incompatibility between musl and the
> kernel headers used by musl.
>
> This has to be sorted out in musl and/or the kernel headers.
>
Although I did not want to I'll start a musl build to create a cleanup
for NM (and maybe) other musl patches.

Andreas