use vector instead of pointer, test=develop (#24620)

paddle/fluid/platform/init.cc

@@ -50,7 +50,7 @@ std::once_flag glog_init_flag;
 std::once_flag p2p_init_flag;
 std::once_flag glog_warning_once_flag;
 
-bool InitGflags(std::vector<std::string> argv) {
+bool InitGflags(std::vector<std::string> args) {
   bool successed = false;
   std::call_once(gflags_init_flag, [&]() {
     FLAGS_logtostderr = true;
@@ -59,20 +59,23 @@ bool InitGflags(std::vector<std::string> argv) {
     // commandline strings from idx 1.
     // The reason is, it assumes that the first one (idx 0) is
     // the filename of executable file.
-    argv.insert(argv.begin(), "dummy");
-    int argc = argv.size();
-    char **arr = new char *[argv.size()];
+    args.insert(args.begin(), "dummy");
+    std::vector<char *> argv;
     std::string line;
-    for (size_t i = 0; i < argv.size(); i++) {
-      arr[i] = &argv[i][0];
-      line += argv[i];
+    int argc = args.size();
+    for (auto &arg : args) {
+      argv.push_back(const_cast<char *>(arg.data()));
+      line += arg;
       line += ' ';
     }
     VLOG(1) << "Before Parse: argc is " << argc
             << ", Init commandline: " << line;
+
+    char **arr = argv.data();
     google::ParseCommandLineFlags(&argc, &arr, true);
-    VLOG(1) << "After Parse: argc is " << argc;
     successed = true;
+
+    VLOG(1) << "After Parse: argc is " << argc;
   });
   return successed;
 }