Re: [Qemu-devel] Fix build break during configuration on musl-libc based Linux systems.

[Peter Maydell]

On 17 February 2017 at 08:56, Paolo Bonzini <address@hidden> wrote:
> So I do think that if musl wants to support _GNU_SOURCE, it should also 
> auto-define;
> however it doesn't, see 
> https://git.musl-libc.org/cgit/musl/tree/include/features.h.

Yes, I agree that this looks like a musl bug. I spoke to a musl
developer I happen to know, and he agreed to submit a patch to
see what the other musl devs think.

In the meantime, we should probably work around this system
bug for the benefit of the existing musl installs in the field.

Defining _XOPEN_SOURCE is easy enough, and I think we should
do it unconditionally. We should check what effect this has
on the BSD hosts though I guess. (You could argue that we
should be defining _XOPEN_SOURCE anyway for the benefit of
the non-glibc BSD/Solaris/etc platforms.)

thanks
-- PMM