Calling a function in a .cpp file from a .c file

I've been struggling to solve a problem with a project I'm working on. Lets assume I have a few files:

reflection.h 
sll_insert.c
record_sll.c
io_recorder.cpp

all of the above mentioned cpp and c files use:

#include "reflection.h"

and in "reflection.h" are the following declarations:

extern void io_recorder_fun_entry(char * name, TypedObject args[], int len);

extern void io_recorder_fun_exit(char * name, TypedObject args[], int len);

These two functions are implemented in "io_recorder.cpp" and they use another function from "io_recorder.cpp" called io_record.

now, in "io_recorder.cpp", the two functions are as follows:

extern "C" void io_recorder_fun_entry(char * name, TypedObject args[], int len) {
    cout << "Entering function "<< name << endl; 
    io_record(args, len);
}

extern "C" void io_recorder_fun_exit(char * name, TypedObject args[], int len) {
    cout << "Exiting function "<< name << endl; 
    io_record(args, len);

}

When in io_record, there are calls being made to several functions declared in reflection.h and implemented in"record_sll.c"`.

I have 2 questions:

1. The connection between C and C++ is not working for me in that case (i have experimented with it previously with other files and it seemed to work before). When trying to compile I receive errors like:

   io_recorder.cpp: In function ‘void io_recorder_fun_entry(char*, TypedObject*, int)’:

   io_recorder.cpp:61:79: error: conflicting declaration of ‘void io_recorder_fun_entry(char*, TypedObject*, int)’ with ‘C’ linkage tern "C" void io_recorder_fun_entry(char * name, TypedObject args[], int len) {

   In file included from io_recorder.cpp:4:0: reflection.h:32:13: note: previous declaration with ‘C++’ linkage extern void io_recorder_fun_entry(char * name, TypedObject args[], int len);

Obviously I did something wrong and I can't figure out what. What am I supposed to change in order for it to compile properly?

2. In previous errors, it appeared that io_record did not recognize the functions from record_sll when I used them. Does it have anything to do with the errors from question 1? If not, what should I do to make sure io_record knows them.

Thanks in advance for the help, I hope i can fix this soon.