Generating an object file in a separate directory using g ++ - compiler - C ++

Question

I am using the following code to compile a cpp file into an object file.

g++ -c main.cpp 

Above the code, .o fles is generated in the same directory as main.cpp.

• Suppose I have a folder called obj and you need to create object files there, how can I write it?
• How to see compiler switches supported by g ++ and it uses?

Any help would be great

Answer 1

Suppose I have a folder called obj and you need to generate object files there, how can I write?

Using:

 g++ -c main.cpp -o obj/main.o 

How to see compiler switches supported by g ++ and it uses?

If you are using a * nix system, use:

 man g++ 

or use info g++

Answer 2

If you type

 $man g++ 

Here is the online help page . You probably have some good information. You can also try

 $g++ --help 

To your question. If you used the -o switch, you can specify the output file to use. So you could do something like

 $g++ -c main.cpp -o obj/main.obj 

Answer 3

Another answer to question 2: More information on compiler switches can be found in the online manual .