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Using Objective C files in C++ files (mm)

If you're using .mm files (C++) in your project, when you include the header files in .mm files header you may get below mentioned error (Even though you have all the right linker flags set):

1. linker failed with exit code 1
2. directory not found

Solution:

1. Try adding the file to .mm file directly (not to .h file for .mm)
2. Try adding the file as extern
extern "C" {
#import "DetectDevice.h"
}
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