Compile_error - C++ for robotics

Course Support C++ For Robotics
#1

Hello,

user:~/catkin_ws$ cd ~/catkin_ws/src/cpp_course_repo/utilities/
user:~/catkin_ws/src/cpp_course_repo/utilities$ g++ -std=c++11 file.cpp -o name_compiled
/usr/lib/gcc/x86_64-linux-gnu/5/…/…/…/x86_64-linux-gnu/crt1.o: In function _start': (.text+0x20): undefined reference to main’
collect2: error: ld returned 1 exit status

What is the reason for this error?

Regards,

#2

This that your main function does not exist or you are trying to call it before it’s defined. You fix that :slight_smile:

#3

Could you elaborate more? How can I do it?

#4

Please carefully follow the instructions in the notes, making sure you are not missing or skipping anything and you should be good.