Exactly. One of the developers on the Haiku forum shared with me the patch
that Haiku uses for qemu, and it has a few lines concerning error codes.
I'll look into this.
https://github.com/haikuports/haikuports/blob/14c2cab5428145b93232cb69683a67bbe68a9f06/app-emulation/qemu/patches/qemu-3.1.1.1.patchset

This is a stopper for the configure script changes? I was thinking that
smaller changes would be best to keep the review more manageable. I'm also
still new around here :)

În dum., 4 iul. 2021 la 05:30, Philippe Mathieu-Daudé <f4...@amsat.org> a
scris:

> On 7/4/21 11:27 AM, Philippe Mathieu-Daudé wrote:
> > On 7/4/21 11:03 AM, Philippe Mathieu-Daudé wrote:
> >> On 7/4/21 12:06 AM, Richard Zak wrote:
> >>> For MIPS (all sub-targets, 64-bit and EL) & xtensa(eb), the compiler
> >>> complains about running out of memory. Best I can see, that's not what
> >>> actually happens, but that's the error message. I was going to
> >>> investigate this later, but this was the error which was causing the
> >>> test with the Haiku VM with that corresponding make target. My desktop
> &
> >>> laptop have 64 GB, and I'm pretty sure it didn't get to that point.
> >>>
> >>>
> >
> /boot/system/develop/tools/bin/../lib/gcc/x86_64-unknown-haiku/8.3.0/../../../../x86_64-unknown-haiku/bin/ld:
> >>> final link failed: memory exhausted
> >
> >> See how Haiku handles POSIX errno:
> >>
> >> https://github.com/haiku/haiku/blob/master/headers/os/support/Errors.h
> >>
> >> #define B_GENERAL_ERROR_BASE   INT_MIN
> >>
> >> #define B_POSIX_ERROR_BASE     (B_GENERAL_ERROR_BASE + 0x7000)
> >>
> >> #define B_POSIX_ENOMEM  B_TO_POSIX_ERROR(B_POSIX_ERROR_BASE + 0)
> >> #define E2BIG           B_TO_POSIX_ERROR(B_POSIX_ERROR_BASE + 1)
> >> #define ECHILD          B_TO_POSIX_ERROR(B_POSIX_ERROR_BASE + 2)
> >> ...
> >>
> >
> > Same problem with Xtensa:
> >
> > static uint32_t errno_h2g(int host_errno)
> > {
> >     static const uint32_t guest_errno[] = {
> >         [EPERM]         = TARGET_EPERM,
> >         [ENOENT]        = TARGET_ENOENT,
> >         [ESRCH]         = TARGET_ESRCH,
> >         [EINTR]         = TARGET_EINTR,
> >         [EIO]           = TARGET_EIO,
> >         [ENXIO]         = TARGET_ENXIO,
> >         [E2BIG]         = TARGET_E2BIG,
> >         [ENOEXEC]       = TARGET_ENOEXEC,
> > ...
>
> Annoyingly enough this is also how linux-user/syscall.c does
> (thinking about code re-use):
>
> /*
>  * This list is the union of errno values overridden in asm-<arch>/errno.h
>  * minus the errnos that are not actually generic to all archs.
>  */
> static uint16_t host_to_target_errno_table[ERRNO_TABLE_SIZE] = {
>     [EAGAIN]            = TARGET_EAGAIN,
>     [EIDRM]             = TARGET_EIDRM,
>     [ECHRNG]            = TARGET_ECHRNG,
>     [EL2NSYNC]          = TARGET_EL2NSYNC,
>     [EL3HLT]            = TARGET_EL3HLT,
>     [EL3RST]            = TARGET_EL3RST,
> ...
>


-- 
Regards,

Richard J. Zak
Professional Genius
PGP Key: https://keybase.io/rjzak/key.asc

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