https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
--- Comment #18 from Eric Gallager ---
(In reply to Sergey Fedorov from comment #17)
> (In reply to Eric Gallager from comment #15)
> > This is one of the things blocking bug 46986, isn't it?
>
> ucontext is supported on macOS, AFAIK.
Only on
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
Sergey Fedorov changed:
What|Removed |Added
CC||vital.had at gmail dot com
--- Comment
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
--- Comment #16 from Ian Lance Taylor ---
This may be a blocker for macOS support, but I don't think it's a major one.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
Eric Gallager changed:
What|Removed |Added
CC||egallager at gcc dot gnu.org
--- Commen
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
--- Comment #14 from Ian Lance Taylor ---
Note that on x86_64 Linux libgo no longer uses ucontext.h. (Well, the #include
is still there, but it is not used.) So we have a clear path to removing
ucontext.h on any given system, but it does unfor
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
Joel Sherrill changed:
What|Removed |Added
CC||joel at gcc dot gnu.org
--- Comment #13
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
--- Comment #12 from Ian Lance Taylor ---
libgo/runtime/runtime.h:
#if defined(__x86_64__) && defined(__linux__) && !defined(__CET__)
...
#else
#define __go_context_t ucontext_t
#define __go_getcontext(c) getcontext(c)
#define __go_setcon
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
--- Comment #11 from Alexander von Gluck ---
Hm.. Could you point me to where Linux is using the (get/set/swap)context
calls? I still haven't found them in the codebase.
I don't want to miss any edge cases if I work up a patch.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
--- Comment #10 from Ian Lance Taylor ---
The makecontext/getcontext/setcontext functions are called by libgo on
GNU/Linux for all targets other than x86_64. It is not the case that they are
used only on *BSD systems.
The default gc implementa
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
--- Comment #9 from Alexander von Gluck ---
Doing a little research, it looks like complaints of ucontext.h have come up
before multiple times:
Similar issue on OpenBSD a long time ago:
https://gcc-help.gcc.gnu.narkive.com/Xx1bResV/can-t-build-
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
--- Comment #8 from Alexander von Gluck ---
Not at all a dumb question :-)
I'm working through compiling libgo / gccgo on Haiku.We have our own lovely
libc which tests posix compliant.
Some historic consideration behind us not having ucont
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
--- Comment #7 from Andrew Pinski ---
Let me ask a dumb question, are you porting GCC/gccgo to a libc which does not
have ucontext.h ? If so what is the libc my I ask?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
--- Comment #6 from Alexander von Gluck ---
For added clairity. Searching the upstream go sources:
```
grep -R getcontext
src/cmd/vendor/golang.org/x/sys/unix/syscall_netbsd.go:// getcontext
src/cmd/vendor/golang.org/x/sys/unix/zsysnum_freebsd
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
--- Comment #5 from Alexander von Gluck ---
> I understand that makecontext/getcontext/setcontext were removed from POSIX.
> However, there is no adequate replacement. Their functionality is absolutely
> required for what libgo does.
No Linu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
--- Comment #4 from Ian Lance Taylor ---
I understand that makecontext/getcontext/setcontext were removed from POSIX.
However, there is no adequate replacement. Their functionality is absolutely
required for what libgo does. Fortunately GNU/Li
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
--- Comment #3 from Alexander von Gluck ---
Good call out. It looks like in 2004 these functions were flagged as
obsolescent though:
https://pubs.opengroup.org/onlinepubs/009695399/functions/makecontext.html
Here's the note on it in the linux
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
--- Comment #2 from Ian Lance Taylor ---
Note that except on x86_64 GNU/Linux, libgo requires the makecontext,
getcontext, and setcontext functions that are declared in ucontext.h. There is
no adequate replacement for those functions on strict
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113143
--- Comment #1 from Alexander von Gluck ---
$ grep -R ucontext.h gcc/libgo
gcc/libgo/configure:#include
gcc/libgo/configure.ac:#include
gcc/libgo/go/runtime/runtime2.go:// _sizeof_ucontext_t is defined by
mkrsysinfo.sh from .
gcc/libgo/misc/c
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