Header Files Not Found (Wrong Path?)

Question

I am trying to compile the a program in Linux and the program contains the following header files:

#include <iostream>
#include <vector>
#include "Minuit2/FCNBase.h"
#include "FunctionMinimum.h"
#include "MnMigrad.h"

etc. The source file is in

home/christian/code

and the header files are all in

/home/christian/root/include/Minuit2

I am trying to compile by running the following command:

g++ -I /Minuit2 niminimzationExample.cpp -o niminimzationExample -L/Minuit2/lib -lMinuit2

But I get the following error message:

In file included from niminimzationExample.cpp:9:0:
/home/christian/root/include/Minuit2/FCNBase.h:13:10: fatal error: Minuit2/MnConfig.h: No such file or directory
 #include "Minuit2/MnConfig.h"

Because the compiler cannot find MnConfig.h which is the first header file inside of FCNBase.h. I have also tried to run

g++ -I /home/christian/root/include/Minuit2 niminimzationExample.cpp -o niminimzationExample -L/Minuit2/lib -lMinuit2

But I still get the same error. What is the write way to include the header files?

Thanks.

Answer 1

If your header is at

/home/christian/root/include/Minuit2/FCNBase.h

Your #include or compile option is wrong.

Currently you are telling the compiler to search for

/Minuit2/Minuit2/FCNBase.h

or

/home/christian/root/include/Minuit2/Minuit2/FCNBase.h

You should specify an option

-I /home/christian/root/include

To have the compiler search for Minuit2/FCNBase.h in the directory /home/christian/root/include.

If you don't want to change the option, you should change the #include to

#include "FCNBase.h"

To have the compiler search for FCNBase.h in the directory /home/christian/root/include/Minuit2.