Re: [ptxdist] External Kconfig menuconfig/nconfig failed

[Alexander Aring <alex.aring@gmail.com>]

On Fri, Oct 23, 2015 at 04:54:34PM +0200, Wim Vinckier wrote:
...
> 
> I actually fixed it by running `ptxdist clean host-ncurses` first.  I
> saw scripts/kconfig/mconf was linked against that library so I thought
> I could give that idea a try.  But now it compiles.
> 

I guess I know what's happening here.

1. You have some pre compiled "scripts/kconfig/mconf".

2. Running system upgrade -> it updates something at libncurses (or
   maybe other dependency, don't know it right now. When I had this
   issue I downgrade libncurses and it doesn't solve the issue).

3. Then it doesn't works anymore. A recompile of "host-ncurses" and new
   building/linking of "scripts/kconfig/mconf" helps.

This sounds like some real-host vs ptxdist-host issue. Something is
provided by ptxdist-host, but also uses parts from real-host.

But this always exists e.g. glibc.


Or maybe ptxdist used at "scripts/kconfig/mconf" from ptxdist-host while
building/linking. But the LD_PRELOAD_PATH, etc isn't right set when
calling "scripts/kconfig/mconf" so a real-host env will be used. I think
this is more likely.

Then I remember that a "ptxdist kernelconfig" doesn't work, but inside
the kernel source tree a "scripts/kconfig/mconf" worked. I think
"host-ncurses" should not link against "host-ncurses" to avoid such
issues. The internal "ptxdist menuconfig" works because it's linked
against "real-host" ncurses lib. (when you type make inside ptxdist
source).

So we should be sure that for Kconfig building/linking and execution
the "real-host" env is used, not anything from "ptxdist-host". Not
"ptxdist-host" because you don't want have linked binaries from
"ptxdist-host" in external source tree's.

This all occurs because our systems has updated some libaries which was
ncurses related, otherwise it looks that it was somehow compatible
together.

Anyway seems like a very rarely issue.

Thanks for providing a solution here.

- Alex

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