[Buildroot] [PATCH] ipkg: needs MMU

[Baruch Siach <baruch@tkos.co.il>]

Hi Thomas,

On Tue, Jul 26, 2016 at 10:01:01AM +0200, Thomas Petazzoni wrote:
> On Tue, 26 Jul 2016 09:59:29 +0200, Thomas Petazzoni wrote:
> > I think this needs more investigation, because:
> > 
> > BR2_bfin=y
> > BR2_TOOLCHAIN_EXTERNAL=y
> > BR2_INIT_NONE=y
> > # BR2_PACKAGE_BUSYBOX is not set
> > BR2_PACKAGE_IPKG=y
> > # BR2_TARGET_ROOTFS_TAR is not set
> > 
> > which is a noMMU configuration, is able to build ipkg just fine.
> 
> I was indeed a bit surprised to see this patch: we have been having
> Blackfin configurations for a long time in the autobuilders, and we
> never had to add a BR2_USE_MMU dependency on this package.
> 
> So I believe there's something a bit more subtle going on here.

Right. It's this code from libbb/libbb.h:

/* Cope with mmu-less systems somewhat gracefully */
#if defined(__UCLIBC__) && !defined(__ARCH_HAS_MMU__)
#define fork    vfork
#endif

This breaks musl that does not define __UCLIBC__. I posted an updated patch to 
uses HAVE_FORK instead.

Is there anyone actually using this package anyway? Even its homepage is not 
accessible here (handhelds.org does not resolve).

Thanks for reviewing,
baruch

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