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git://sourceware.org/git/newlib-cygwin.git
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4eca8ea0cf
Hi, As I mentioned recently [1], newlib is providing a "kill" symbol to link against, without declaring "kill" in signal.h. This is confusing for the libgfortran build, which tries to link against kill (which succeeds), then tries to use it (which triggers -Werror=implicit-function-declaration). This patch implements my suggestion in that thread - making the declaration of 'kill' in libc/include/sys/signal.h unconditional. I've tested this by building a modified libgfortran on AArch64/ARM to see that the Werror goes away, and the libgfortran build succeeds. Is something like this OK for newlib? If so, can someone please commit it on my behalf, as I have no commit access here. Otherwise, what is your preferred direction for me to take this patch? Thanks, James
367 lines
12 KiB
C
367 lines
12 KiB
C
/* sys/signal.h */
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#ifndef _SYS_SIGNAL_H
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#define _SYS_SIGNAL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "_ansi.h"
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#include <sys/cdefs.h>
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#include <sys/features.h>
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#include <sys/types.h>
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#include <sys/_timespec.h>
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/* #ifndef __STRICT_ANSI__*/
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/* Cygwin defines it's own sigset_t in include/cygwin/signal.h */
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#ifndef __CYGWIN__
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typedef unsigned long sigset_t;
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#endif
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#if defined(__rtems__)
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#if defined(_POSIX_REALTIME_SIGNALS)
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/* sigev_notify values
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NOTE: P1003.1c/D10, p. 34 adds SIGEV_THREAD. */
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#define SIGEV_NONE 1 /* No asynchronous notification shall be delivered */
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/* when the event of interest occurs. */
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#define SIGEV_SIGNAL 2 /* A queued signal, with an application defined */
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/* value, shall be delivered when the event of */
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/* interest occurs. */
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#define SIGEV_THREAD 3 /* A notification function shall be called to */
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/* perform notification. */
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/* Signal Generation and Delivery, P1003.1b-1993, p. 63
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NOTE: P1003.1c/D10, p. 34 adds sigev_notify_function and
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sigev_notify_attributes to the sigevent structure. */
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union sigval {
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int sival_int; /* Integer signal value */
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void *sival_ptr; /* Pointer signal value */
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};
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struct sigevent {
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int sigev_notify; /* Notification type */
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int sigev_signo; /* Signal number */
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union sigval sigev_value; /* Signal value */
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#if defined(_POSIX_THREADS)
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void (*sigev_notify_function)( union sigval );
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/* Notification function */
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pthread_attr_t *sigev_notify_attributes; /* Notification Attributes */
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#endif
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};
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/* Signal Actions, P1003.1b-1993, p. 64 */
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/* si_code values, p. 66 */
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#define SI_USER 1 /* Sent by a user. kill(), abort(), etc */
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#define SI_QUEUE 2 /* Sent by sigqueue() */
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#define SI_TIMER 3 /* Sent by expiration of a timer_settime() timer */
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#define SI_ASYNCIO 4 /* Indicates completion of asycnhronous IO */
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#define SI_MESGQ 5 /* Indicates arrival of a message at an empty queue */
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typedef struct {
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int si_signo; /* Signal number */
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int si_code; /* Cause of the signal */
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union sigval si_value; /* Signal value */
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} siginfo_t;
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#endif
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/* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 */
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#define SA_NOCLDSTOP 0x1 /* Do not generate SIGCHLD when children stop */
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#define SA_SIGINFO 0x2 /* Invoke the signal catching function with */
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/* three arguments instead of one. */
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#if __BSD_VISIBLE || __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
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#define SA_ONSTACK 0x4 /* Signal delivery will be on a separate stack. */
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#endif
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/* struct sigaction notes from POSIX:
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*
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* (1) Routines stored in sa_handler should take a single int as
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* their argument although the POSIX standard does not require this.
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* This is not longer true since at least POSIX.1-2008
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* (2) The fields sa_handler and sa_sigaction may overlap, and a conforming
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* application should not use both simultaneously.
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*/
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typedef void (*_sig_func_ptr)(int);
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struct sigaction {
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int sa_flags; /* Special flags to affect behavior of signal */
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sigset_t sa_mask; /* Additional set of signals to be blocked */
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/* during execution of signal-catching */
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/* function. */
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union {
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_sig_func_ptr _handler; /* SIG_DFL, SIG_IGN, or pointer to a function */
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#if defined(_POSIX_REALTIME_SIGNALS)
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void (*_sigaction)( int, siginfo_t *, void * );
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#endif
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} _signal_handlers;
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};
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#define sa_handler _signal_handlers._handler
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#if defined(_POSIX_REALTIME_SIGNALS)
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#define sa_sigaction _signal_handlers._sigaction
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#endif
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#elif defined(__CYGWIN__)
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#include <cygwin/signal.h>
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#else
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#define SA_NOCLDSTOP 1 /* only value supported now for sa_flags */
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typedef void (*_sig_func_ptr)(int);
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struct sigaction
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{
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_sig_func_ptr sa_handler;
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sigset_t sa_mask;
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int sa_flags;
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};
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#endif /* defined(__rtems__) */
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#if __BSD_VISIBLE || __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
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/*
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* Minimum and default signal stack constants. Allow for target overrides
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* from <sys/features.h>.
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*/
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#ifndef MINSIGSTKSZ
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#define MINSIGSTKSZ 2048
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#endif
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#ifndef SIGSTKSZ
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#define SIGSTKSZ 8192
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#endif
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/*
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* Possible values for ss_flags in stack_t below.
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*/
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#define SS_ONSTACK 0x1
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#define SS_DISABLE 0x2
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#endif
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/*
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* Structure used in sigaltstack call.
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*/
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typedef struct sigaltstack {
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void *ss_sp; /* Stack base or pointer. */
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int ss_flags; /* Flags. */
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size_t ss_size; /* Stack size. */
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} stack_t;
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#define SIG_SETMASK 0 /* set mask with sigprocmask() */
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#define SIG_BLOCK 1 /* set of signals to block */
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#define SIG_UNBLOCK 2 /* set of signals to, well, unblock */
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/* These depend upon the type of sigset_t, which right now
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is always a long.. They're in the POSIX namespace, but
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are not ANSI. */
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#define sigaddset(what,sig) (*(what) |= (1<<(sig)), 0)
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#define sigdelset(what,sig) (*(what) &= ~(1<<(sig)), 0)
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#define sigemptyset(what) (*(what) = 0, 0)
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#define sigfillset(what) (*(what) = ~(0), 0)
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#define sigismember(what,sig) (((*(what)) & (1<<(sig))) != 0)
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int _EXFUN(sigprocmask, (int how, const sigset_t *set, sigset_t *oset));
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#if defined(_POSIX_THREADS)
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int _EXFUN(pthread_sigmask, (int how, const sigset_t *set, sigset_t *oset));
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#endif
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#if defined(__CYGWIN__) || defined(__rtems__)
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#undef sigaddset
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#undef sigdelset
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#undef sigemptyset
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#undef sigfillset
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#undef sigismember
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#ifdef _COMPILING_NEWLIB
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int _EXFUN(_kill, (pid_t, int));
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#endif /* _COMPILING_NEWLIB */
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#endif /* __CYGWIN__ || __rtems__ */
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int _EXFUN(kill, (pid_t, int));
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#if defined(__CYGWIN__) || defined(__rtems__)
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int _EXFUN(killpg, (pid_t, int));
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int _EXFUN(sigaction, (int, const struct sigaction *, struct sigaction *));
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int _EXFUN(sigaddset, (sigset_t *, const int));
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int _EXFUN(sigdelset, (sigset_t *, const int));
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int _EXFUN(sigismember, (const sigset_t *, int));
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int _EXFUN(sigfillset, (sigset_t *));
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int _EXFUN(sigemptyset, (sigset_t *));
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int _EXFUN(sigpending, (sigset_t *));
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int _EXFUN(sigsuspend, (const sigset_t *));
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int _EXFUN(sigpause, (int));
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#if defined(__CYGWIN__) || defined(__rtems__)
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#if __BSD_VISIBLE || __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
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int _EXFUN(sigaltstack, (const stack_t *__restrict, stack_t *__restrict));
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#endif
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#endif
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#if defined(_POSIX_THREADS)
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#ifdef __CYGWIN__
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# ifndef _CYGWIN_TYPES_H
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# error You need the winsup sources or a cygwin installation to compile the cygwin version of newlib.
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# endif
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#endif
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int _EXFUN(pthread_kill, (pthread_t thread, int sig));
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#endif
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#if defined(_POSIX_REALTIME_SIGNALS)
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/* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76
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NOTE: P1003.1c/D10, p. 39 adds sigwait(). */
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int _EXFUN(sigwaitinfo, (const sigset_t *set, siginfo_t *info));
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int _EXFUN(sigtimedwait,
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(const sigset_t *set, siginfo_t *info, const struct timespec *timeout)
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);
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int _EXFUN(sigwait, (const sigset_t *set, int *sig));
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/* 3.3.9 Queue a Signal to a Process, P1003.1b-1993, p. 78 */
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int _EXFUN(sigqueue, (pid_t pid, int signo, const union sigval value));
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#endif /* defined(_POSIX_REALTIME_SIGNALS) */
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#endif /* defined(__CYGWIN__) || defined(__rtems__) */
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/* #endif __STRICT_ANSI__ */
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#if defined(___AM29K__)
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/* These all need to be defined for ANSI C, but I don't think they are
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meaningful. */
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#define SIGABRT 1
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#define SIGFPE 1
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#define SIGILL 1
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#define SIGINT 1
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#define SIGSEGV 1
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#define SIGTERM 1
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/* These need to be defined for POSIX, and some others do too. */
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#define SIGHUP 1
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#define SIGQUIT 1
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#define NSIG 2
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#elif defined(__GO32__)
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#define SIGINT 1
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#define SIGKILL 2
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#define SIGPIPE 3
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#define SIGFPE 4
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#define SIGHUP 5
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#define SIGTERM 6
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#define SIGSEGV 7
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#define SIGTSTP 8
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#define SIGQUIT 9
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#define SIGTRAP 10
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#define SIGILL 11
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#define SIGEMT 12
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#define SIGALRM 13
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#define SIGBUS 14
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#define SIGLOST 15
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#define SIGSTOP 16
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#define SIGABRT 17
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#define SIGUSR1 18
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#define SIGUSR2 19
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#define NSIG 20
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#elif !defined(SIGTRAP)
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#define SIGHUP 1 /* hangup */
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#define SIGINT 2 /* interrupt */
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#define SIGQUIT 3 /* quit */
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#define SIGILL 4 /* illegal instruction (not reset when caught) */
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#define SIGTRAP 5 /* trace trap (not reset when caught) */
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#define SIGIOT 6 /* IOT instruction */
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#define SIGABRT 6 /* used by abort, replace SIGIOT in the future */
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#define SIGEMT 7 /* EMT instruction */
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#define SIGFPE 8 /* floating point exception */
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#define SIGKILL 9 /* kill (cannot be caught or ignored) */
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#define SIGBUS 10 /* bus error */
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#define SIGSEGV 11 /* segmentation violation */
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#define SIGSYS 12 /* bad argument to system call */
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#define SIGPIPE 13 /* write on a pipe with no one to read it */
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#define SIGALRM 14 /* alarm clock */
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#define SIGTERM 15 /* software termination signal from kill */
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#if defined(__rtems__)
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#define SIGURG 16 /* urgent condition on IO channel */
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#define SIGSTOP 17 /* sendable stop signal not from tty */
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#define SIGTSTP 18 /* stop signal from tty */
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#define SIGCONT 19 /* continue a stopped process */
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#define SIGCHLD 20 /* to parent on child stop or exit */
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#define SIGCLD 20 /* System V name for SIGCHLD */
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#define SIGTTIN 21 /* to readers pgrp upon background tty read */
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#define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */
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#define SIGIO 23 /* input/output possible signal */
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#define SIGPOLL SIGIO /* System V name for SIGIO */
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#define SIGWINCH 24 /* window changed */
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#define SIGUSR1 25 /* user defined signal 1 */
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#define SIGUSR2 26 /* user defined signal 2 */
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/* Real-Time Signals Range, P1003.1b-1993, p. 61
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NOTE: By P1003.1b-1993, this should be at least RTSIG_MAX
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(which is a minimum of 8) signals.
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*/
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#define SIGRTMIN 27
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#define SIGRTMAX 31
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#define __SIGFIRSTNOTRT SIGHUP
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#define __SIGLASTNOTRT SIGUSR2
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#define NSIG 32 /* signal 0 implied */
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#elif defined(__svr4__)
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/* svr4 specifics. different signals above 15, and sigaction. */
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#define SIGUSR1 16
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#define SIGUSR2 17
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#define SIGCLD 18
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#define SIGPWR 19
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#define SIGWINCH 20
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#define SIGPOLL 22 /* 20 for x.out binaries!!!! */
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#define SIGSTOP 23 /* sendable stop signal not from tty */
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#define SIGTSTP 24 /* stop signal from tty */
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#define SIGCONT 25 /* continue a stopped process */
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#define SIGTTIN 26 /* to readers pgrp upon background tty read */
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#define SIGTTOU 27 /* like TTIN for output if (tp->t_local<OSTOP) */
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#define NSIG 28
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#else
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#define SIGURG 16 /* urgent condition on IO channel */
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#define SIGSTOP 17 /* sendable stop signal not from tty */
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#define SIGTSTP 18 /* stop signal from tty */
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#define SIGCONT 19 /* continue a stopped process */
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#define SIGCHLD 20 /* to parent on child stop or exit */
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#define SIGCLD 20 /* System V name for SIGCHLD */
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#define SIGTTIN 21 /* to readers pgrp upon background tty read */
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#define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */
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#define SIGIO 23 /* input/output possible signal */
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#define SIGPOLL SIGIO /* System V name for SIGIO */
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#define SIGXCPU 24 /* exceeded CPU time limit */
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#define SIGXFSZ 25 /* exceeded file size limit */
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#define SIGVTALRM 26 /* virtual time alarm */
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#define SIGPROF 27 /* profiling time alarm */
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#define SIGWINCH 28 /* window changed */
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#define SIGLOST 29 /* resource lost (eg, record-lock lost) */
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#define SIGUSR1 30 /* user defined signal 1 */
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#define SIGUSR2 31 /* user defined signal 2 */
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#define NSIG 32 /* signal 0 implied */
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#endif
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#endif
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#ifdef __cplusplus
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}
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#endif
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#if defined(__CYGWIN__)
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#if __POSIX_VISIBLE >= 200809
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#include <sys/ucontext.h>
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#endif
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#endif
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#ifndef _SIGNAL_H_
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/* Some applications take advantage of the fact that <sys/signal.h>
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* and <signal.h> are equivalent in glibc. Allow for that here. */
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#include <signal.h>
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#endif
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#endif /* _SYS_SIGNAL_H */
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