c - 在“select.h”中找不到“FD_SET”函数声明

Question

我正在学习unix网络编程。我包含#include <sys/select.h>并调用FD_SET函数。当我gcc手动运行时，代码可以成功编译。

问题是我的 IDEClion无法识别FD_SET，所以它不能帮助我在输入时自动完成其余代码FD_。所以我检查了select.h文件，我在文件中找不到FD_SET声明。

这是select.h我Mac上的源代码：

#ifndef _SYS_SELECT_H_
#define _SYS_SELECT_H_

#include <sys/appleapiopts.h>
#include <sys/cdefs.h>
#include <sys/_types.h>

/*
 * [XSI] The <sys/select.h> header shall define the fd_set type as a structure.
 * The timespec structure shall be defined as described in <time.h>
 * The <sys/select.h> header shall define the timeval structure.
 */
#include <sys/_types/_fd_def.h>
#include <sys/_types/_timespec.h>
#include <sys/_types/_timeval.h>

/*
 * The time_t and suseconds_t types shall be defined as described in
 * <sys/types.h>
 * The sigset_t type shall be defined as described in <signal.h>
 */
#include <sys/_types/_time_t.h>
#include <sys/_types/_suseconds_t.h>
#include <sys/_types/_sigset_t.h>

/*
 * [XSI] FD_CLR, FD_ISSET, FD_SET, FD_ZERO may be declared as a function, or
 *   defined as a macro, or both
 * [XSI] FD_SETSIZE shall be defined as a macro
 */

/*
 * Select uses bit masks of file descriptors in longs.  These macros
 * manipulate such bit fields (the filesystem macros use chars).  The
 * extra protection here is to permit application redefinition above
 * the default size.
 */
#include <sys/_types/_fd_setsize.h>
#include <sys/_types/_fd_set.h>
#include <sys/_types/_fd_clr.h>
#include <sys/_types/_fd_isset.h>
#include <sys/_types/_fd_zero.h>

#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
#include <sys/_types/_fd_copy.h>
#endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */


__BEGIN_DECLS

#ifndef  __MWERKS__
int      pselect(int, fd_set * __restrict, fd_set * __restrict,
    fd_set * __restrict, const struct timespec * __restrict,
    const sigset_t * __restrict)
#if defined(_DARWIN_C_SOURCE) || defined(_DARWIN_UNLIMITED_SELECT)
__DARWIN_EXTSN_C(pselect)
#else /* !_DARWIN_C_SOURCE && !_DARWIN_UNLIMITED_SELECT */
#  if defined(__LP64__) && !__DARWIN_NON_CANCELABLE
__DARWIN_1050(pselect)
#  else /* !__LP64__ || __DARWIN_NON_CANCELABLE */
__DARWIN_ALIAS_C(pselect)
#  endif /* __LP64__ && !__DARWIN_NON_CANCELABLE */
#endif /* _DARWIN_C_SOURCE || _DARWIN_UNLIMITED_SELECT */
;
#endif /* __MWERKS__ */

#include <sys/_select.h>        /* select() prototype */

__END_DECLS


#endif /* !_SYS_SELECT_H_ */

那么，我在哪里可以找到FD_SET声明？我应该如何配置我的clion以便它可以识别它？

标签： cselectclion