David,
I am still compiling with:
env "CC=gcc2 -no-cpp-precomp -D_POSIX_SOURCE
but I still get those errors. ;(
DaR
> -----Original Message-----
> From: David N. Williams [mailto:David.N.Williams@;umich.edu]
> Sent: Friday, October 25, 2002 11:14 AM
> To: [EMAIL PROTECTED]
> Subject: Re: [gforth] --enable-indirect-threaded on PPC?
>
>
> Anton Ertl wrote:
> > Dennis Ruffer wrote:
> >
> >>Anton,
> >>
> >>On Jaguar (10.2.1), your changes produce the following errors:
> >>
> >>signals.c: In function `bsd_signal':
> >>signals.c:77: `SA_ONSTACK' undeclared (first use in this function)
> >>signals.c:77: (Each undeclared identifier is reported only once
> >>signals.c:77: for each function it appears in.)
> >>signals.c: In function `install_signal_handlers':
> >>signals.c:359: `stack_t' undeclared (first use in this function)
> >>signals.c:359: parse error before `sigstack'
> >>signals.c:362: `sigstack' undeclared (first use in this function)
> >>signals.c:362: `SIGSTKSZ' undeclared (first use in this function)
> >>signals.c:365: warning: implicit declaration of function
> `sigaltstack'
> >>signals.c:365: parse error before `)'
> >>
> >>DaR
> >
> >
> > Thanks. Jaguar is a codename for some MacOS X version,
> right? Looks
> > like there's no sigaltstack() and friends there (nor SA_SIGINFO). I
> > expected this from older Unices, but had hoped that this
> functionality
> > would be present in all recent systems (after all, it's in Unix 95).
> > Try putting
> >
> > #define _XOPEN_SOURCE 500
> > #define _XOPEN_SOURCE_EXTENDED
> > #define _POSIX_C_SOURCE 199506L
> >
> > at the start of engine/signals.c and recompile. Let me know if this
> > works or if you find another way to get to sigaltstack().
> If not, you
> > will just have to eliminate this stuff and live with this minor
> > unpleasantness (the absensence of SA_SIGINFO causes much more
> > unpleasantness, though: "Invalid memory address" instead of "Stack
> > underflow" etc.).
>
> I wonder if Dennis is compiling with -D_POSIX_SOURCE to avoid a
> problem with the absence of the signals FPE_INTDIV, FPE_INTOVF,
> and FPE_FLTSUB in MacOS X that was discussed around August 25.
> That prevents the definition of SA_SIGINFO, along with just
> about everything in Dennis's list above, as far as I can see.
>
> In signals.c, gforth has
>
> -----------------
> #ifdef SA_SIGINFO
> static void fpe_handler(int sig, siginfo_t *info, void *_)
> /* handler for SIGFPE */
> {
> int code;
>
> switch(info->si_code) {
> case FPE_INTDIV: code=-10; break; /* integer divide by zero */
> case FPE_INTOVF: code=-11; break; /* integer overflow */
> case FPE_FLTDIV: code=-42; break; /* floating point divide by
> zero */
> case FPE_FLTOVF: code=-43; break; /* floating point overflow */
> case FPE_FLTUND: code=-54; break; /* floating point underflow */
> case FPE_FLTRES: code=-41; break; /* floating point inexact
> result */
> case FPE_FLTINV: /* invalid floating point operation */
> case FPE_FLTSUB: /* subscript out of range */
> default: code=-55; break;
> }
> longjmp(throw_jmp_buf,code);
> }
> ------------------
>
> On the other hand, /usr/include/sys/signals.h only has
>
> ----------------------
> /* Codes for SIGFPE */
> #define FPE_NOOP 0 /* if only I knew... */
> #define FPE_FLTDIV 1 /* floating point divide by zero */
> #define FPE_FLTOVF 2 /* floating point overflow */
> #define FPE_FLTUND 3 /* floating point underflow */
> #define FPE_FLTRES 4 /* floating point inexact result */
> #define FPE_FLTINV 5 /* invalid floating point
> operation */
> ----------------------
>
> That's why I made the suggestion that compiler errors from the
> nonexistent signals could be avoided by not defining SA_SIGINFO,
> which is in signals.h like this:
>
> ----------------------------
> #if !defined(_POSIX_SOURCE)
> #define SA_ONSTACK 0x0001 /* take signal on signal stack */
> #define SA_RESTART 0x0002 /* restart system on signal
> return */
> #define SA_DISABLE 0x0004 /* disable taking signals on
> alternate stack */
> #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking
> signal */
> #define SA_NODEFER 0x0010 /* don't mask the signal we're
> delivering */
> #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */
> #define SA_SIGINFO 0x0040 /* signal handler with
> SA_SIGINFO args */
> #define SA_USERTRAMP 0x0100 /* do not bounce off kernel's
> sigtramp */
> #endif
> ----------------------------
>
> That has the effect of also eliminating the structures, etc.,
> used by sigaltstack(), because they also occur in signal.h in
> the scope of a "#if !defined(_POSIX_SOURCE)" statement.
>
> I was too ignorant to worry about defining _POSIX_SOURCE.
>
> At any rate, maybe it comes down to what's the best way to get
> around the missing signals, FPE_INTDIV, FPE_INTOVF, and FPE_FLTSUB.
>
> -- David
>
>
>
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