[Axiom-developer] Re: MAC OSX port

[Martin Snelgrove]

Tim,

I'll split my response into a couple of mails, to reduce my own confusion. Here's the result of looking around in my
Mac 10.3.8 +Fink + darwinports for sigaction in includes. Next mail runs the requested compile.

sigaction appears in /usr/include/signal.h and also /usr/include/sys/signal.h (which have the Apple&BSD license stuff at the top): 
I'll paste in extracts in the general area below. Re Fink, I didn't find it in grepping  /sw/include/*.h, and there is no /sw/include/sys.

I see -I/usr/include/sys but not -I/usr/include in the transcript file.

As to Fink; first off I should point out that there's also the "darwinports.org" project, which I believe puts things in /opt. Here's
a clip of me looking for signal.h in both /opt and /sw:

include $ find /opt -name signal.h
include $ find /sw -name signal.h
/sw/lib/gcc/powerpc-apple-darwin7.7.0/3.4.3/include/sys/signal.h
/sw/src/g77-3.4-20031015-2/darwin/gcc/include/sys/signal.h
/sw/src/g77-3.4-20031015-2/gcc-3.4-20031015/gcc/fixinc/tests/base/sys/signal.h
/sw/src/g77-3.4-20031015-2/gcc-3.4-20031015/libstdc++-v3/include/c_compatibility/signal.h

which I interpret to mean that the Fink gcc and g77 compilers have their own ideas about signal.h, or don't trust Apple.

regards
ws

here's the head of /usr/include/signal.h after the comments:

#ifndef _USER_SIGNAL_H
#define _USER_SIGNAL_H

#include <sys/types.h>
#include <sys/cdefs.h>
#include <sys/signal.h>

#if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
extern __const char *__const sys_signame[NSIG];
extern __const char *__const sys_siglist[NSIG];
#endif

__BEGIN_DECLS
int     raise(int);
#ifndef _ANSI_SOURCE
int     kill(pid_t, int);
int     sigaction(int, const struct sigaction *, struct sigaction *);

--------------------- CUT -------------------------------

and here's the piece in /usr/include/sys/signal.h

/* union for signal handlers */
union __sigaction_u {
void    (*__sa_handler)(int);
void    (*__sa_sigaction)(int, struct __siginfo *,
void *);
};

/* Signal vector template for Kernel user boundary */
struct  __sigaction {
union __sigaction_u __sigaction_u;  /* signal handler */
void    (*sa_tramp)(void *, int, int, siginfo_t *, void *);
sigset_t sa_mask;               /* signal mask to apply */
int     sa_flags;               /* see signal options below */
};

/*
* Signal vector "template" used in sigaction call.
*/
struct  sigaction {
union __sigaction_u __sigaction_u;  /* signal handler */
sigset_t sa_mask;               /* signal mask to apply */
int     sa_flags;               /* see signal options below */
};
/* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */
#define sa_handler      __sigaction_u.__sa_handler
#define sa_sigaction    __sigaction_u.__sa_sigaction



On Feb 14, 2005, at 01.19, root wrote:

> Martin,
>
> It appears from the warning messages that there are incomplete include files.
> The message:
>
> bsdsignal.c:68: warning: implicit declaration of function `sigaction'
>
> implies that there was no declaration of the 'sigaction' function. The
> declarations are normally in include files and sigaction is fundamental
> so it would come from a system include file. From your environment strings
> I can see the options for the CCFLAGS and it appears that the include
> files are all found but they don't seem to declare sigaction.
>
> Please try the following and send the output:
>
> cd /Users/snelgar/downloads/axiom/int/lib
> gcc -E -Wall -D_GNU_SOURCE -DMACOSXplatform -I/usr/X11/include -I/usr/include/sys bsdsignal.c
>
> The -E flag run the preprocessor and inline all of the include files.
> If sigaction is not declared then we have to figure out where the MAC
> would hide the declaration.
>
> Does Fink have a special directory which has include files?
> If so, grep for sigaction and let me know what files contain it.
>
> Tim