[compilers] Fix c/c++ compilation warnings and errors

components/drivers/include/ipc/workqueue.h

@@ -13,6 +13,10 @@
 
 #include <rtthread.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 enum
 {
     RT_WORK_STATE_PENDING    = 0x0001,     /* Work item pending state */
@@ -70,7 +74,9 @@ rt_err_t rt_work_urgent(struct rt_work *work);
 rt_err_t rt_work_cancel(struct rt_work *work);
 #endif /* RT_USING_SYSTEM_WORKQUEUE */
 
-
+#ifdef __cplusplus
+}
+#endif
 
 #endif /* RT_USING_HEAP */
 

components/fal/src/fal_partition.c

@@ -43,6 +43,9 @@ struct part_flash_info
 #elif defined (__GNUC__)               /* GNU GCC Compiler */
     #define SECTION(x)                 __attribute__((section(x)))
     #define USED                       __attribute__((used))
+#elif defined (_MSC_VER)
+    #define SECTION(x)
+    #define USED
 #else
     #error not supported tool chain
 #endif /* __CC_ARM */

components/fal/src/fal_rtt.c

@@ -875,7 +875,7 @@ static void fal(uint8_t argc, char **argv) {
                             result = fal_partition_read(part_dev, i, read_data, cur_op_size);
                         }
                         /* data check */
-                        for (int index = 0; index < cur_op_size; index ++)
+                        for (size_t index = 0; index < cur_op_size; index ++)
                         {
                             if (write_data[index] != read_data[index])
                             {

components/libc/compilers/common/extension/fcntl.h

@@ -13,6 +13,10 @@
 
 #include "sys/types.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define O_RDONLY         00
 #define O_WRONLY         01
 #define O_RDWR           02
@@ -68,4 +72,8 @@ int open(const char *file, int flags, ...);
 int fcntl(int fildes, int cmd, ...);
 int creat(const char *path, mode_t mode);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

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

@@ -20,6 +20,10 @@
 #include <winsock.h>
 #endif
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifndef  FD_SETSIZE
 #define  FD_SETSIZE  32
 #endif
@@ -55,4 +59,8 @@ typedef struct _types_fd_set {
 int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout);
 #endif /* _WIN32 */
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* __SYS_SELECT_H__ */

components/libc/compilers/common/extension/sys/stat.h

@@ -14,6 +14,10 @@
 #include <sys/types.h>
 #include <sys/time.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define S_IFMT               00170000
 #define S_IFSOCK             0140000
 #define S_IFLNK              0120000
@@ -80,4 +84,8 @@ int    mknod(const char *, mode_t, dev_t);
 int    stat(const char *, struct stat *);
 mode_t umask(mode_t);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

components/libc/compilers/common/extension/sys/types.h

@@ -16,6 +16,10 @@
 #include <stddef.h>
 #include <time.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef int32_t          clockid_t;
 typedef int32_t          key_t;         /* Used for interprocess communication. */
 typedef int              pid_t;         /* Used for process IDs and process group IDs. */
@@ -39,4 +43,8 @@ typedef unsigned int     u_int;
 typedef unsigned char    u_char;
 typedef unsigned long    u_long;
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

components/libc/compilers/common/extension/sys/unistd.h

@@ -15,6 +15,10 @@
 #include <stddef.h>
 #include "types.h" /* <sys/types.h> */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define STDIN_FILENO    0       /* standard input file descriptor */
 #define STDOUT_FILENO   1       /* standard output file descriptor */
 #define STDERR_FILENO   2       /* standard error file descriptor */
@@ -46,4 +50,8 @@ uid_t geteuid(void);
 gid_t getgid(void);
 gid_t getegid(void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* _SYS_UNISTD_H */

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

@@ -15,6 +15,10 @@
 #include <winsock.h>
 #endif
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct winsize
 {
     unsigned short ws_row;
@@ -271,4 +275,8 @@ struct winsize
 
 int ioctl(int fildes, int cmd, ...);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

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

@@ -12,6 +12,10 @@
 
 #include <stddef.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct statfs
 {
     size_t f_bsize;   /* block size */
@@ -22,4 +26,8 @@ struct statfs
 int statfs(const char *path, struct statfs *buf);
 int fstatfs(int fd, struct statfs *buf);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

components/utilities/var_export/var_export.c

@@ -83,7 +83,7 @@ int var_export_init(void)
     static char __vexp_strbuf1[1024];
     static char __vexp_strbuf2[1024];
     ve_exporter_t ve_exporter_temp;
-    int index_i, index_j;
+    rt_size_t index_i, index_j;
 
     /* past the three members in first ptr_begin */
     ptr_begin += (sizeof(struct ve_exporter) / sizeof(unsigned int));