* 修改编译方式为CMake

* 删除C++适配代码
* 修改编译告警

common/rt/src/rt_file.cpp

@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <dirent.h>
+
+#include "rt_common.h"
+
+int rt_file_exsit(const char *realpath_file)
+{
+    return (!access(realpath_file, F_OK));
+}
+
+int rt_dir_exsit (const char *realpath)
+{
+    DIR *dir = NULL;
+    int exsit = 0;
+
+    if (unlikely (!realpath))
+		goto finish;
+
+    dir = opendir(realpath);
+    if (!dir) goto finish;
+
+    exsit = 1;
+    closedir(dir);
+finish:
+    return exsit;
+}
+