Re: UML fails to build on arch i386

[Ritesh Raj Sarraf <rrs@researchut.com>]

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Hello Richard,

On Thu, 2018-06-14 at 20:41 +0200, Richard Weinberger wrote:
> > 
> > #ifdef __x86_64__
> >    /* Access TLS data.  */
> >    PTRACE_ARCH_PRCTL = 30,
> > # define PT_ARCH_PRCTL PTRACE_ARCH_PRCTL
> > #endif
> > 
> >    /* Continue and stop at the next syscall, it will not be
> > executed.  */
> >    PTRACE_SYSEMU = 31,
> > #define PT_SYSEMU PTRACE_SYSEMU
> 
> Okay, PTRACE_SYSEMU seems to be part of an enum, that's why UML's
> #ifndef does not
> not protect the #define.
> 
> What libc is this?

This is glibc 2.27 from Debian.

rrs@priyasi:~$ dpkg -S /usr/include/x86_64-linux-gnu/sys/ptrace.h 
libc6-dev:amd64: /usr/include/x86_64-linux-gnu/sys/ptrace.h
12:19 ♒♒♒   ☺ 😄    
rrs@priyasi:~$ apt policy libc6-dev
libc6-dev:
  Installed: 2.27-3
  Candidate: 2.27-3
  Version table:
 *** 2.27-3 900
        900 http://deb.debian.org/debian testing/main amd64 Packages
        500 http://deb.debian.org/debian unstable/main amd64 Packages
        100 /var/lib/dpkg/status
12:19 ♒♒♒   ☺ 😄    



> 
> I think we can remove UML's define check and just assume that every
> system has PTRACE_SYSEMU
> properly defined.
-- 
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."

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