from your paste above I presume  
You Want to get this data from the object files **( *.obj )** and not from the compiled and linked executable 

if yes then COFF (component object file format ) is pretty well documented 
all you need to parse  is COFF SYMBOL TABLE 

you can use dumpbin /SYMBOLS to look for all functions 


    C:\Users\xx\source\repos\dumpfuncs>dumpbin /symbols dumpfuncs.obj | grep -i (
    
    Microsoft (R) COFF/PE Dumper Version 14.16.27035.0
    
    Copyright (C) Microsoft Corporation.  All rights reserved.
    
    010 00000000 SECT5  notype ()    External     | ?CmdLn@@YAPADXZ (char * __cdecl CmdLn(void))
    011 00000010 SECT5  notype ()    External     | ?FileName@@YAPADXZ (char * __cdecl FileName(void))
    012 00000020 SECT5  notype ()    External     | _main