[bug#68202] [PATCH 5/5] gnu: libsigsegv: Fix building for x86_64-linux-gnux32.

[Efraim Flashner]

On Wed, Jan 03, 2024 at 09:43:32AM +0100, Mathieu Othacehe wrote:
> 
> Hello Efraim,
> 
> > +      ;; On some architectures 'struct sigcontext' gets redefined from
> > +      ;; %linux-libre-headers/include/asm/sigcontext.h
> > +      ,@(cond ((target-mips64el?)
> > +               `(#:phases (modify-phases %standard-phases
> > +                            (add-before 'configure 'patch-mips-old-h
> > +                              (lambda _
> > +                                (substitute* "src/fault-linux-mips-old.h"
> > +                                  (("#include <asm/sigcontext\\.h>") 
> > "")))))))
> > +              ((target-x32?)
> > +               `(#:phases (modify-phases %standard-phases
> > +                            (add-before 'configure 
> > 'patch-linux-x86_64-old-h
> > +                              (lambda _
> > +                                (substitute* "src/fault-linux-x86_64-old.h"
> > +                                  (("#include <asm/sigcontext\\.h>") 
> > "")))))))
> > +              (else '()))))
> >     (description
> >      "GNU libsigsegv is a library to handle page faults, which occur when a
> >  program tries to access an unavailable region of memory, in user mode.  By
> 
> #67859 is doing more or less the same thing, but for x86_64 as a
> whole. Could you maybe replace `target-x32` by `target-x86`?
> 
> Maybe we should come up with a list of architectures that need that kind
> of fix in libsigsegv and patch all the src/fault-linux-xxx-old-h?

I don't have a mips machine hooked up so I can't test if its needed
natively. I did check debian's packaging of libsigsegv and they don't
have anything like this for any architecture.  It wouldn't be hard to
change it to (if (%current-target-system)
                ... (substitute* (find-files "src" "fault.*-old\\.h$")
which would hit every instance of this include

> The rest of the series seems fine to me.
> 
> Thanks,
> 
> Mathieu

-- 
Efraim Flashner   <efraim@flashner.co.il>   רנשלפ םירפא
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