linux based C++ project-how to start

Dear group, I have a C++ project taht contain many fiels .cc and .h, no file named main or so...how cah I trace the project and start it step by step to understand its concept, should I draw a map for files calling each other, how to find first one to be executed, and what is the meaing of pro

make failed, cant find a file

Dear group, I am trying to use make for a C++ project and I got the folloing ERROR: /usr/include/linux/errno.h:1:23: fatal error: asm/errno.h: No such file or directory #include thanks in advance RaGia _