gcc编译 signal-信号

rt-thread内核的libc_signal.h头文件没有gcc编译器的宏定义

发布于 2020-08-07 20:09:25 浏览：2237 订阅该版

```c
#if defined(__CC_ARM) || defined(__CLANG_ARM)

#define SIGHUP       1
/* #define SIGINT       2 */
#define SIGQUIT      3
/* #define SIGILL       4 */
#define SIGTRAP      5
/* #define SIGABRT      6 */
#define SIGEMT       7
/* #define SIGFPE       8 */
#define SIGKILL      9
#define SIGBUS      10
/* #define SIGSEGV     11 */
#define SIGSYS      12
#define SIGPIPE     13
#define SIGALRM     14
/* #define SIGTERM     15 */
#define SIGURG      16
#define SIGSTOP     17
#define SIGTSTP     18
#define SIGCONT     19
#define SIGCHLD     20
#define SIGTTIN     21
#define SIGTTOU     22
#define SIGPOLL     23
#define SIGWINCH    24
/* #define SIGUSR1     25 */
/* #define SIGUSR2     26 */
#define SIGRTMIN    27
#define SIGRTMAX    31
#define NSIG        32

#define SIG_SETMASK 0   /* set mask with sigprocmask() */
#define SIG_BLOCK   1   /* set of signals to block */
#define SIG_UNBLOCK 2   /* set of signals to, well, unblock */

struct sigaction
{
    _sig_func_ptr sa_handler;
    sigset_t sa_mask;
    int sa_flags;
};

#define sigaddset(what,sig) (*(what) |= (1<<(sig)), 0)
#define sigdelset(what,sig) (*(what) &= ~(1<<(sig)), 0)
#define sigemptyset(what)   (*(what) = 0, 0)
#define sigfillset(what)    (*(what) = ~(0), 0)
#define sigismember(what,sig) (((*(what)) & (1<<(sig))) != 0)

int sigprocmask (int how, const sigset_t *set, sigset_t *oset);
int sigaction(int signum, const struct sigaction *act, struct sigaction *oldact);

#elif defined(__IAR_SYSTEMS_ICC__)

#define SIGHUP       1
#define SIGINT       2
#define SIGQUIT      3
#define SIGILL       4
#define SIGTRAP      5
/* #define SIGABRT      6 */
#define SIGEMT       7
#define SIGFPE       8
#define SIGKILL      9
#define SIGBUS      10
#define SIGSEGV     11
#define SIGSYS      12
#define SIGPIPE     13
#define SIGALRM     14
#define SIGTERM     15
#define SIGURG      16
#define SIGSTOP     17
#define SIGTSTP     18
#define SIGCONT     19
#define SIGCHLD     20
#define SIGTTIN     21
#define SIGTTOU     22
#define SIGPOLL     23
#define SIGWINCH    24
#define SIGUSR1     25
#define SIGUSR2     26
#define SIGRTMIN    27
#define SIGRTMAX    31
#define NSIG        32

#define SIG_SETMASK 0   /* set mask with sigprocmask() */
#define SIG_BLOCK   1   /* set of signals to block */
#define SIG_UNBLOCK 2   /* set of signals to, well, unblock */

struct sigaction
{
    _sig_func_ptr sa_handler;
    sigset_t sa_mask;
    int sa_flags;
};

int sigprocmask (int how, const sigset_t *set, sigset_t *oset);
int sigaction(int signum, const struct sigaction *act, struct sigaction *oldact);
#endif
```
 
这个头文件只涉及到ARMCC，ARMCLANG和IAR的编译器的宏，gcc编译器的宏不见了，以致于官方给的信号的例程编译出错，找不到SIGUSR1。
![a9dcb1816438bbb3c20b753257687fc4.png](/uploads/20200807/a9dcb1816438bbb3c20b753257687fc4.png)