[oe] linux-libc-headers-native, gcc-cross issue

[Khem Raj]

On (21/06/10 21:27), Frans Meulenbroeks wrote:
> 2010/6/21 Tom Rini <tom_rini at mentor.com>:
> > Frans Meulenbroeks wrote:
> >>
> >> Dear all,
> >>
> >> After the introduction of linux-libc-headers-native I've bumped into
> >> the following issue.
> >> linux-libc-headers-native installs unistd.h in sysroots
> >> This causes other recipes to pick up the x86 files instead of the target
> >> ones.
> >> I've seen this happen for both unistd.h and sigcontext.h
> >
> > What DISTRO/MACHINE are you using?
> 
> DISTRO is angstrom-2008.1, MACHINE is NEEK; this one is NIOS2 based
> and not committed yet.
> From examining the gcc-cross dir I suspect some other archtectures
> will also be vulnerable to this (as they also have a linux-unwind.h
> which includes signal.h to get sigcontext).
> The following architectures have a sigcontext struct in their gcc/config dir:
> 
> gcc-cross-4.1.2-r23.1/gcc-4.1.2/gcc/config> grep -r sigcontext .
> ./sh/linux-unwind.h:  struct sigcontext *sc;
> ./sh/linux-unwind.h:      sc = (struct sigcontext *) (void *)
> &rt_->uc.uc_mcontext;
> ./sh/linux-unwind.h:  struct sigcontext *sc;
> ./sh/linux-unwind.h:      sc = (struct sigcontext *) (void *)
> &rt_->uc.uc_mcontext;
> ./alpha/linux-unwind.h:  struct sigcontext *sc;
> ./i386/linux-unwind.h:  struct sigcontext *sc;
> ./i386/linux-unwind.h:      sc = (struct sigcontext *) (void *)
> &uc_->uc_mcontext;
> ./i386/linux-unwind.h:  struct sigcontext *sc;
> ./i386/linux-unwind.h:      sc = (struct sigcontext *) (void *)
> &rt_->uc.uc_mcontext;
> ./mips/linux-unwind.h:    struct sigcontext uc_mcontext;
> ./mips/linux-unwind.h:  struct sigcontext *sc;
> ./mips/linux-unwind.h:	struct sigcontext sigctx;
> ./mips/linux-unwind.h:  /* On o32 Linux, the register save slots in
> the sigcontext are
> ./ia64/linux-unwind.h:/* This works only for glibc-2.3 and later,
> because sigcontext is different
> ./ia64/linux-unwind.h:	struct sigcontext *sc;
> ./ia64/linux-unwind.h:      struct sigcontext *sc = frame_->sc;
> ./ia64/linux-unwind.h:	 in the sigcontext but leaves them intact, so there's no
> ./ia64/linux-unwind.h:	struct sigcontext *sc;
> ./ia64/linux-unwind.h:      struct sigcontext *sc = frame->sc;
> ./ia64/linux-unwind.h:	 in the sigcontext but leaves them intact, so there's no
> ./pa/linux-unwind.h:   tell us how to locate the sigcontext structure.
> ./pa/linux-unwind.h:  struct sigcontext *sc;
> ./nios2/linux-unwind.h:	struct sigcontext ctx;

try to port recipes/gcc/gcc-4.2.4/sh_unwind.patch to nios. This could help
here.

-Khem