Re: [PATCH] um: use POSIX ucontext_t instead of struct ucontext

[Richard Weinberger]

Am Mittwoch, 15. November 2017, 11:12:39 CET schrieb Krzysztof Mazur:
> glibc 2.26 removed the 'struct ucontext' to "improve" POSIX compliance
> and break programs, including User Mode Linux. Fix User Mode Linux
> by using POSIX ucontext_t.
> 
> This fixes:
> 
> arch/um/os-Linux/signal.c: In function 'hard_handler':
> arch/um/os-Linux/signal.c:163:22: error: dereferencing pointer to incomplete
> type 'struct ucontext' mcontext_t *mc = &uc->uc_mcontext;
> arch/x86/um/stub_segv.c: In function 'stub_segv_handler':
> arch/x86/um/stub_segv.c:16:13: error: dereferencing pointer to incomplete
> type 'struct ucontext' &uc->uc_mcontext);

Do all older glibcs have ucontext_t?
Otherwise this patch will break other stuff.

Thanks,
//richard