[libc] fix the sys/select.h problem (#5790)

components/libc/compilers/common/sys/select.h

@@ -12,7 +12,7 @@
 #ifndef __SYS_SELECT_H__
 #define __SYS_SELECT_H__
 
-#include <rtconfig.h>
+#include <rtthread.h>
 #include <sys/types.h>
 #include <sys/time.h>
 
@@ -53,7 +53,7 @@ typedef struct _types_fd_set {
 #define FD_SET(n, p)    ((p)->fds_bits[(n)/NFDBITS] |= (1L << ((n) % NFDBITS)))
 #define FD_CLR(n, p)    ((p)->fds_bits[(n)/NFDBITS] &= ~(1L << ((n) % NFDBITS)))
 #define FD_ISSET(n, p)  ((p)->fds_bits[(n)/NFDBITS] & (1L << ((n) % NFDBITS)))
-#define FD_ZERO(p)      memset((void*)(p), 0, sizeof(*(p)))
+#define FD_ZERO(p)      rt_memset((void*)(p), 0, sizeof(*(p)))
 #endif /* _SYS_TYPES_FD_SET */
 
 int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout);

components/libc/compilers/newlib/legacy/SConscript

@@ -1,15 +0,0 @@
-# RT-Thread building script for bridge
-
-import os
-from building import *
-
-cwd = GetCurrentDir()
-objs = []
-list = os.listdir(cwd)
-
-for d in list:
-    path = os.path.join(cwd, d)
-    if os.path.isfile(os.path.join(path, 'SConscript')):
-        objs = objs + SConscript(os.path.join(d, 'SConscript'))
-
-Return('objs')

components/libc/compilers/newlib/legacy/_select/SConscript

@@ -1,20 +0,0 @@
-from shutil import copy
-from building import *
-from gcc import *
-Import('rtconfig')
-
-src   = []
-cwd   = GetCurrentDir()
-CPPPATH = [cwd]
-group = []
-
-# sys/select.h does not exist in newlib 2.2.0 or lower version
-if rtconfig.PLATFORM == 'gcc' and (CheckHeader(rtconfig, 'sys/select.h') == False):
-    try:
-        copy("../../../../common/nogcc/sys/select.h", "./sys/select.h") # copy from 'nogcc/sys/select.h'
-    except:
-        pass
-
-    group = DefineGroup('Compiler', src, depend = [''], CPPPATH = CPPPATH)
-
-Return('group')

components/libc/compilers/newlib/legacy/_select/readme.md

@@ -1,2 +0,0 @@
-Newlib 2.2.0 or lower version does not provide `sys/select.h`, and `fd_set` is defined in `sys/types.h`. It will be generated by scons automatically, and **DO NOT** change it.
-

components/libc/compilers/newlib/legacy/_select/sys/select.h

@@ -1,58 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- * 2021-07-21     Meco Man     The first version
- */
-
-#ifndef __SYS_SELECT_H__
-#define __SYS_SELECT_H__
-
-#include <rtconfig.h>
-#include <sys/types.h>
-#include <sys/time.h>
-
-#ifdef _WIN32
-#include <winsock.h>
-#endif
-
-#ifndef  FD_SETSIZE
-#define  FD_SETSIZE  32
-#endif
-
-#ifdef SAL_USING_POSIX
-#ifdef FD_SETSIZE
-#undef FD_SETSIZE
-#endif
-#define FD_SETSIZE      DFS_FD_MAX
-#endif /* SAL_USING_POSIX */
-
-typedef long    fd_mask;
-
-#ifndef _WIN32
-#ifndef _SYS_TYPES_FD_SET /* MIPS */
-
-#define   NBBY    8       /* number of bits in a byte */
-#define   NFDBITS (sizeof (fd_mask) * NBBY)   /* bits per mask */
-#ifndef   howmany
-#define   howmany(x,y)    (((x)+((y)-1))/(y))
-#endif
-
-typedef struct _types_fd_set {
-    fd_mask fds_bits[howmany(FD_SETSIZE, NFDBITS)];
-} _types_fd_set;
-#define fd_set _types_fd_set
-
-#define FD_SET(n, p)    ((p)->fds_bits[(n)/NFDBITS] |= (1L << ((n) % NFDBITS)))
-#define FD_CLR(n, p)    ((p)->fds_bits[(n)/NFDBITS] &= ~(1L << ((n) % NFDBITS)))
-#define FD_ISSET(n, p)  ((p)->fds_bits[(n)/NFDBITS] & (1L << ((n) % NFDBITS)))
-#define FD_ZERO(p)      memset((void*)(p), 0, sizeof(*(p)))
-#endif /* _SYS_TYPES_FD_SET */
-
-int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout);
-#endif /* _WIN32 */
-
-#endif /* __SYS_SELECT_H__ */